The hybrid system uses a combination of diesel engine and electric power to provide varying levels of torque during vehicle operation. If the hybrid system has a fault, or if a hybrid component is above the optimum operating temperature, the vehicle will reduce the amount of available Motor/Generator torque. This is when you should perform the Eaton Fuller hybrid transmission hybrid performance test.
Note: Some faults codes affect the amount of torque available from the Motor/Generator which will be noticeable to the driver.
Note: This symptom-based test should only be performed when directed by the Symptom-Driven Diagnostics Index and there are no Active fault codes.
Eaton Fuller Hybrid Transmission Hybrid Performance Test Detection
The following symptoms may have been experienced:
- Vehicle acceleration performance is not acceptable.
Fallback for performing Eaton Fuller Hybrid Transmission Hybrid Performance Test:
Some faults codes affect the amount of torque available from the Motor/Generator and will be noticeable to the driver.
Possible Causes for performing the Hybrid Performance Test
This fault code can be caused by any of the following:
- Hybrid liquid cooling system
- PEC air cooling system restriction or poor air flow
- Reduce engine power
- Truckload capacity above the rated amount