Enabling/Set Conditions And Possible Causes
PTU SYSTEM ENABLING CONDITIONS AND FAULT SETTING CRITERIA
The PTU faults have these shared Monitoring Conditions:
- With the ignition on.
- Battery voltage between 6.0 and 16.0 volts for more than 500 ms.
- Engine is not cranking.
- No under voltage or over voltage faults present.
- No loss of communication with the PTU/RDM smart actuator fault present.
Additional Monitoring Conditions for Circuit/Performance/Internal/Mismatch faults:
- No loss of communication with PTU/RDM smart actuator fault present.
Additional Monitoring Conditions for Circuit/Performance/Internal/Loss of Communication faults:
- PROXI Configuration is valid.
| FAULT SETTING CRITERIA | |
|---|---|
(C1492-00, C1493-00) - Internal actuator performance
|
The smart actuator detects an internal hardware or software issue. |
| (C2206-00, C2223-00) - Configuration Mismatch fault | The vehicle PROXI configuration is incorrect or an ECU was swapped in from another vehicle. |
(U1203-00, U1204-00) - Loss of Communication Fault
|
Will set for one of the following:
|
| POSSIBLE CAUSES |
|---|
| FUSED IGNITION SUPPLY TO THE SMART ACTUATOR OPEN/HIGH RESISTANCE OR SHORTED TO GROUND (LOSS OF COMM FAULTS) |
| GROUND TO THE SMART ACTUATOR OPEN/HIGH RESISTANCE (LOSS OF COMM FAULTS) |
| INCORRECT VEHICLE CONFIGURATION/INCORRECT DTCM OR SMART ACTUATOR INSTALLED (MISMATCH FAULTS) |
| FAULTY SMART ACTUATOR |
| FAULTY DRIVETRAIN CONTROL MODULE (DTCM) |
Default Actions:
- ALL WHEEL DRIVE (AWD) WARNING INDICATOR: On, except for overtemp fault.
- ELECTRONIC VEHICLE INFORMATION CENTER (EVIC) MESSAGE: AWD System Service Required.
- PTU SHIFTING: PTU will continue attempting to perform shifts between FWD and AWD.
- REAR DRIVELINE MODULE (RDM) CLUTCH: Normal operation unless fault occurred during shift-in-progress.