ULEV Model

DTC P1851: Problem in Creep Aid System Solenoid Valve B Circuit
ULEV Model

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1. Turn the ignition switch OFF.
2. Disconnect TCM connectors A (31P) and B (24P).
3. Turn the ignition switch ON (II).





4. Measure the voltage between TCM connector terminals B5 and A23 or A24.
Is there voltage?
YES- Repair short to power in the wire between TCM connector terminal B5 and the creep aid system solenoid valve B.
NO- Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the 4P connector from the creep aid system solenoid valves A and B.





7. Check for continuity between TCM connector terminals B5 and A23 or A24.
Is there continuity?
YES- Repair short to ground in the wire between TCM connector terminal B5 and the creep aid system solenoid valve B.
NO- Go to step 8.
8. Connect the creep aid system solenoid valves A and B connector.





9. Measure the resistance between TCM connector terminals B5 and A23 or A24.
Is there 8 - 24 Ohms?
YES- Check the terminal fit at TCM connector terminal B5. If the connection is OK, update the TCM if it does not have the latest software, or substitute a known-good TCM, then recheck. If the symptom/indication goes away with a known-good TCM, replace the original TCM.
NO- Check for an open in the wire between TCM connector terminal B5 and the creep aid system solenoid valve B. and between the creep aid system solenoid valve B and ground (G201). If the wire is OK, replace the creep aid system solenoid valves A and B.