[fusion_builder_container hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” hundred_percent_height_center_content=”yes” equal_height_columns=”no” menu_anchor=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” publish_date=”” class=”” id=”” background_color=”” background_image=”” background_position=”center center” background_repeat=”no-repeat” fade=”no” background_parallax=”none” enable_mobile=”no” parallax_speed=”0.3″ video_mp4=”” video_webm=”” video_ogv=”” video_url=”” video_aspect_ratio=”16:9″ video_loop=”yes” video_mute=”yes” video_preview_image=”” border_size=”” border_color=”” border_style=”solid” margin_top=”35″ margin_bottom=”” padding_top=”” padding_right=”” padding_bottom=”” padding_left=””][fusion_builder_row][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_text columns=”” column_min_width=”” column_spacing=”” rule_style=”default” rule_size=”” rule_color=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””]

Eaton Fuller Hybrid Transmission Fault Code 37 – Power Supply (TECU)

[/fusion_text][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” hundred_percent_height_center_content=”yes” equal_height_columns=”no” menu_anchor=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” publish_date=”” class=”” id=”” background_color=”” background_image=”” background_position=”center center” background_repeat=”no-repeat” fade=”no” background_parallax=”none” enable_mobile=”no” parallax_speed=”0.3″ video_mp4=”” video_webm=”” video_ogv=”” video_url=”” video_aspect_ratio=”16:9″ video_loop=”yes” video_mute=”yes” video_preview_image=”” border_size=”” border_color=”” border_style=”solid” margin_top=”” margin_bottom=”” padding_top=”” padding_right=”” padding_bottom=”” padding_left=””][fusion_builder_row][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_text columns=”” column_min_width=”” column_spacing=”” rule_style=”default” rule_size=”” rule_color=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””]

Fault code for Eaton Hybrid Drive Systems models (MY08) EH-8E306A-U, EH-8E306A-UPG, EH-8E306A-UP, EH-8E306A-CD, EH-8E306A-T, EH-6E606B-CD, (MY09) EH-8E406A-U/P, EH-8E406A-UP, EH-8E406A-UPG, EH-8E406A-CD, EH-8E406A-CDG, EH-8E406A-CDR, EH-8E406A-T, EH-6E706B-CD, EH-6E706B-P and EH-6E706B-UPG. The Transmission Electronic Control Unit (TECU) is mounted to the transmission and contains the software that controls the transmission operation; however, the Hybrid Control Module (HCM) controls the operation of the TECU during normal hybrid mode. The TECU main battery power is a fused, 12-volt feed that runs through the TECU 38-Way Vehicle Connector with the main ground wire returning to the battery negative terminal.

Fault Code 37 – Power Supply (TECU) Detection

The following preconditions must be met before the system detects the fault:

TECU ignition voltage is greater than 7 volts and less than 16 volts.
TECU only runs this test if the Electric Shifter is being cycled from N to gear.

Note: When troubleshooting an Inactive code refer to the Product Diagnostic Mode (PDM)

Conditions to Set Fault Code Active

FMI 5 is set when the TECU power supply resistance is measured before and during an electric shifter test and the results show a measurement of 0.4 ohms or greater.

Fallback When Fault Code 37 is set the following conditions occur:

Fault is stored in TECU memory.

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Conditions to Set Fault Code Inactive

Only Inactive faults can be cleared from the Transmission Electronic Control Unit (TECU) or HCM history using ServiceRanger. The TECU automatically clears the faults from history after 200 hours and the HCM automatically clears the faults from history after the fault has been Inactive for 200 hours.

This fault code can be caused by any of the following:

FMI 5
- Power supply to TECU
- Low batteries or bad main power connection
- Broken or corroded battery interconnect straps may also be the cause of high resistance readings

Fault Code 37 – Power Supply (TECU) Test

Component Identification:

[/fusion_text][/fusion_builder_column][fusion_builder_column type=”1_1″ layout=”1_2″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_imageframe image_id=”14126|full” max_width=”” style_type=”” blur=”” stylecolor=”” hover_type=”none” bordersize=”” bordercolor=”” borderradius=”” align=”center” lightbox=”no” gallery_id=”” lightbox_image=”” lightbox_image_id=”” alt=”Harness Front View TECU – Vehicle Interface Connector” link=”” linktarget=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]https://www.globaltransmissionsupply.com/wp-content/uploads/Harness-Front-View-TECU.jpg[/fusion_imageframe][fusion_text columns=”” column_min_width=”” column_spacing=”” rule_style=”default” rule_size=”” rule_color=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””]

Front View
(TECU – Vehicle Interface Connector)

NOTE: Refer to the Eaton Hybrid Component and Connector Location for Connector Locations in MY08 Systems

NOTE: Refer to the Eaton Hybrid Component and Connector Location for Connector Locations in MY09 Systems.

[/fusion_text][/fusion_builder_column][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_imageframe image_id=”14205|full” max_width=”” style_type=”” blur=”” stylecolor=”” hover_type=”none” bordersize=”” bordercolor=”” borderradius=”” align=”center” lightbox=”no” gallery_id=”” lightbox_image=”” lightbox_image_id=”” alt=”Eaton TECU battery connector” link=”” linktarget=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]https://www.globaltransmissionsupply.com/wp-content/uploads/TECU-battery-connector.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_image_id=”” background_color=”” background_image=”” background_position=”left top” undefined=”” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”15″ margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_text columns=”” column_min_width=”” column_spacing=”” rule_style=”default” rule_size=”” rule_color=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””]

Warning! – Do Not Load Test at Diagnostic Port

[/fusion_text][fusion_imageframe image_id=”14206|800″ max_width=”” style_type=”” blur=”” stylecolor=”” hover_type=”none” bordersize=”” bordercolor=”” borderradius=”” align=”none” lightbox=”no” gallery_id=”” lightbox_image=”” lightbox_image_id=”” alt=”Eaton Fuller transmission 4 pin diagnostic port” link=”” linktarget=”_self” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]https://www.globaltransmissionsupply.com/wp-content/uploads/4-pin-diagnostic-port-800×495.jpg[/fusion_imageframe][/fusion_builder_column][fusion_builder_column type=”1_2″ layout=”1_2″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_text columns=”” column_min_width=”” column_spacing=”” rule_style=”default” rule_size=”” rule_color=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””]

4-Pin Diagnostic Port
(Located at the left rear corner of the transmission.)

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B – Service Bat. +
C – Service Bat. –
A – Service Ignition +

[/fusion_text][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” hundred_percent_height_center_content=”yes” equal_height_columns=”no” menu_anchor=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” publish_date=”” class=”” id=”” background_color=”” background_image=”” background_position=”center center” background_repeat=”no-repeat” fade=”no” background_parallax=”none” enable_mobile=”no” parallax_speed=”0.3″ video_mp4=”” video_webm=”” video_ogv=”” video_url=”” video_aspect_ratio=”16:9″ video_loop=”yes” video_mute=”yes” video_preview_image=”” border_size=”” border_color=”” border_style=”solid” margin_top=”” margin_bottom=”” padding_top=”” padding_right=”” padding_bottom=”” padding_left=””][fusion_builder_row][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_modal name=”warnings_cautions” title=”Warnings & Cautions” size=”large” background=”” border_color=”” show_footer=”yes” class=”” id=””]Danger: Danger indicates you will be severely injured or killed if do not follow the indicated procedure.
Warning: Warning indicates an immediate hazard, which could result in severe personal injury if you do not follow the indicated procedure.
Caution: Caution indicates vehicle or property damage could occur if you do not follow the indicated procedure.

Note: Note indicates additional detail that will aid in the diagnosis or repair of a component/system.

Follow the specified procedures in the indicated order to avoid personal injury:

1. If the high-voltage cones are around the vehicle and the lockout is installed on the PEC, the only person that should be allowed to start the vehicle is the person who signed the lockout tag.
2. Before working on a vehicle or leaving the cab while the engine is running, you should place the shift lever in “N” set the parking brake, and block the wheels.
3. For safety reasons, always engage the service brakes prior to selecting gear positions from “N.”
4. Before starting a vehicle always be seated in the driver’s seat, select “N” on the shift control, and set the parking brakes.
5. In vehicles with ePTO, the engine and/or
Motor/Generator can start in ePTO mode. Never perform any maintenance or work on vehicle, while in this mode.
6. 12-Volt Battery positive (+) and negative (-) must be disconnected prior to any welding on any Hybrid equipped vehicle.

Caution: Follow the specified procedures in the indicated order to avoid equipment malfunction or damage.
Caution: Do not release the parking brake or attempt to select a gear until the air pressure is at the correct level.
Caution: To avoid damage to the transmission during towing place the shift lever in “N” and lift the drive wheels off the ground or disconnect the driveline.

High-Voltage Warnings & Cautions

Use CO2 or Dry Chemical Fire Extinguishers.
The high-voltage wiring is covered in orange insulation or convoluted tubing and marked with warning labels at the connectors.
All Eaton® Hybrid Diesel/Electric vehicles will be marked ‘Hybrid’ on the outside of the vehicle, along with the shift label on the dash.
Refer to OEM for specific location of chassis mounted hybrid components.
Do NOT cut into the orange high-voltage cables.
Do NOT cut into or open the PEC.
Do NOT cut into or open the DC/DC Converter.
Do NOT cut into or open the Inverter.

A buffer zone must be set up and high-voltage insulated rubber gloves (class 0 with leather protectors) are required prior to working on high-voltage. Failure to follow these instructions may result in severe personal injury or death.
The rubber-insulated gloves that must be worn while working on the high-voltage system are class 0 with leather protectors. The rubber gloves should be tested before EVERY use following the rubber insulation gloves testing procedure found in “Diagnostic Tools/Service Publications” on page 6. Failure to follow these instructions may result in severe personal injury or death.
Before inspecting or working on any high-voltage cables or components the “High-Voltage Service Shutdown and Power-Up Procedure” on page 4 should be followed. Failure to follow these instructions may result in severe personal injury or death.
The Lockout and Tagout devices should only be removed by the technician that placed the Lockout and Tagout devices on the vehicle. Failure to follow these instructions may result in severe personal injury or death.
High-voltage rubber insulated gloves (class 0 with leather protectors) must be worn when working on any
high-voltage cables. The “High-Voltage Service Shutdown and Power-Up Procedure” on page 4 must be followed prior to removing any high-voltage cables. Failure to follow these instructions may result in severe personal injury or death.
High-voltage cables and wiring are orange and contain a warning label at the connectors. High-voltage components are marked with a label. High-voltage rubber insulated gloves (class 0 with leather protectors) must be used when working on any of these components. Failure to follow these instructions may result in severe personal injury or death.

High-Voltage Service Shutdown Procedures

1. Follow “High-Voltage Work Area” procedure.
2. Locate the red PEC Service Switch on the front of the PEC and push switch off.
3. Remove the Service Switch Cover and install the Lockout Bracket (J48506).
4. Fasten tag to the Lockout Bracket.
5. Ensure the PEC Service Switch can not move from the off position.
6. Allow the system to set for a minimum of 5 minutes to discharge high voltage.
7. Connect ServiceRanger and view the Data Monitor PID 116 called “High-Voltage Battery Potential.” Use SPN 520323 for J1939 connection “Battery Voltage RB” (Relay Box).
8. The voltage should be 30 volts or less. If the voltage is above 30 volts, do not work on the vehicle and contact Eaton® at 1-800-826-HELP (4357).
9. Turn ignition key off and proceed to repair or troubleshooting step.
Note: The voltage drops to zero when the key is off.

High-Voltage Service Power-Up Procedure

1. Install all high-voltage connectors into their locked positions.
2. If you are the person working on the vehicle, remove the Lockout Bracket and tag.
3. Reinstall the Lockout Bracket over the Service Switch.
4. Pull the Service Switch out and let vehicle set for 2 minutes.
5. Start vehicle when appropriate.[/fusion_modal][fusion_modal name=”component_location” title=”Eaton Hybrid Component and Connector Location ” size=”large” background=”#ffffff” border_color=”” show_footer=”yes” class=”” id=””]

[/fusion_modal][fusion_modal name=”component_location2″ title=”Eaton Hybrid Component and Connector Location MY09 Systems” size=”large” background=”#ffffff” border_color=”” show_footer=”yes” class=”” id=””]

[/fusion_modal][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container hundred_percent=”no” hundred_percent_height=”no” hundred_percent_height_scroll=”no” hundred_percent_height_center_content=”yes” equal_height_columns=”no” menu_anchor=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” status=”published” publish_date=”” class=”” id=”” background_color=”” background_image=”” background_position=”center center” background_repeat=”no-repeat” fade=”no” background_parallax=”none” enable_mobile=”no” parallax_speed=”0.3″ video_mp4=”” video_webm=”” video_ogv=”” video_url=”” video_aspect_ratio=”16:9″ video_loop=”yes” video_mute=”yes” video_preview_image=”” border_size=”” border_color=”” border_style=”solid” margin_top=”” margin_bottom=”” padding_top=”” padding_right=”” padding_bottom=”” padding_left=””][fusion_builder_row][fusion_builder_column type=”1_1″ layout=”1_1″ spacing=”” center_content=”no” link=”” target=”_self” min_height=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=”” background_color=”” background_image=”” background_image_id=”” background_position=”left top” background_repeat=”no-repeat” hover_type=”none” border_size=”0″ border_color=”” border_style=”solid” border_position=”all” padding_top=”” padding_right=”” padding_bottom=”” padding_left=”” margin_top=”” margin_bottom=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=”” last=”no”][fusion_content_boxes layout=”clean-horizontal” columns=”2″ title_size=”18px” heading_size=”3″ title_color=”#ffffff” body_color=”#ffffff” backgroundcolor=”#4f4f4f” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” icon_circle=”” icon_circle_radius=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” icon_size=”” icon_hover_type=”” hover_accent_color=”” image=”” image_id=”” image_width=”” image_height=”” link_type=”” button_span=”” link_area=”” link_target=”” icon_align=”left” animation_type=”” animation_delay=”” animation_offset=”” animation_direction=”left” animation_speed=”0.3″ margin_top=”” margin_bottom=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””][fusion_content_box title=”STEP 1. Check for Active or Inactive fault code status and perform Electrical Pretest.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”Read More” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Retrieve Active fault codes and FMIs with ServiceRanger using the 9-Way Diagnostic Connector.
Perform the Electrical Pretest.
- If Fault Code 37 is Active after performing the Electrical Pretest, go to Step 2.
- If Fault Code 37 is Inactive after performing the Electrical Pretest, clear codes, see Clear Inactive Faults. Go to Step 6.

[/fusion_content_box][fusion_content_box title=”STEP 2. Verify voltage at Transmission Harness Diagnostic Connector.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Locate diagnostic port on Transmission Harness.
Key on.
Measure voltage between Pin C and the battery negative post.
- If voltage between Pin C and battery negative post is 0.70 volts or less, go to Step 3.
- If voltage is outside of range, repair battery ground supply to TECU, then go to Step 6.

[/fusion_content_box][/fusion_content_boxes][fusion_content_boxes layout=”clean-horizontal” columns=”2″ title_size=”18px” heading_size=”3″ title_color=”#ffffff” body_color=”#ffffff” backgroundcolor=”#4f4f4f” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” icon_circle=”” icon_circle_radius=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” icon_size=”” icon_hover_type=”” hover_accent_color=”” image=”” image_id=”” image_width=”” image_height=”” link_type=”” button_span=”” link_area=”” link_target=”” icon_align=”left” animation_type=”” animation_delay=”” animation_offset=”” animation_direction=”left” animation_speed=”0.3″ margin_top=”” margin_bottom=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””][fusion_content_box title=”STEP 3. Verify voltages at Transmission Harness diagnostic connector.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”Read More” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Locate diagnostic port on Transmission Harness.
Key on.
Measure voltage between Pin B and Pin C.
- If voltage between Pin B and Pin C is within 0.6 volts of battery voltage, go to Step 4.
- If voltage is outside of range, repair battery power supply to TECU. Fuse may be blown. Repeat test.

[/fusion_content_box][fusion_content_box title=”STEP 4. Verify voltages at Transmission Harness diagnostic connector.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Key on.
Measure voltage between Pin A and Pin C.
- If voltage between Pin A and Pin C is within 0.6 volts of battery voltage, go to Step 5.
- If voltage is outside of range, repair Ignition Power Supply to ECU. Fuse may be blown. Repeat test.

[/fusion_content_box][/fusion_content_boxes][fusion_content_boxes layout=”clean-horizontal” columns=”2″ title_size=”18px” heading_size=”3″ title_color=”#ffffff” body_color=”#ffffff” backgroundcolor=”#4f4f4f” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” icon_circle=”” icon_circle_radius=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” icon_size=”” icon_hover_type=”” hover_accent_color=”#f41000″ image=”” image_id=”” image_width=”” image_height=”” link_type=”” button_span=”” link_area=”” link_target=”” icon_align=”left” animation_type=”” animation_delay=”” animation_offset=”” animation_direction=”left” animation_speed=”0.3″ margin_top=”” margin_bottom=”” hide_on_mobile=”small-visibility,medium-visibility,large-visibility” class=”” id=””][fusion_content_box title=”STEP 5. Verify integrity of Vehicle Interface Harness connections.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Key off.
Disconnect negative battery cable.
Disconnect the Vehicle Harness 38-Way Connector.
Inspect main power 38-Way Connector Terminals Pin 36 and Pin 38, inline fuse holder, and power supply connections for integrity and corrosion.
- If no problem found, go to Step 6.
- If problem is found, repair power/ground path for the Main Power Supply, then go to Step 6.

[/fusion_content_box][fusion_content_box title=”STEP 6. Verify repair.” backgroundcolor=”” icon=”” iconflip=”” iconrotate=”” iconspin=”no” iconcolor=”” circlecolor=”” circlebordersize=”” circlebordercolor=”” outercirclebordersize=”” outercirclebordercolor=”” image=”” image_id=”” image_width=”” image_height=”” link=”” linktext=”Read More” link_target=”” animation_type=”” animation_direction=”left” animation_speed=”0.3″ animation_offset=””]

Key off.
Clean and reconnect all connectors.
Key on.
Clear codes, see Clear Inactive Faults.
Drive the vehicle and attempt to reset the code.
Check for codes, see View Active and Inactive Faults.
- If no codes, test is complete.
- If fault Code 37 appears, find error in testing, go to Step 1.
- If a code other than 37 appears, see Fault Code Index List.

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