P1851

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

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

1. Turn the ignition switch OFF.
2. Disconnect TCM connectors A (26P) and B (22P).
3. Turn the ignition switch ON (II).





4. Measure the voltage between TCM connector terminals B18 and A4 or A17.
Is there voltage?
YES-Repair short to power in the wire between TCM connector terminal B18 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 B18 and A4 or A17.
Is there continuity?
YES-Repair short to ground in the wire between TCM connector terminal B18 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 B18 and A4 or A17.
Is there 8 - 24 Ohms ?
YES-Check for loose terminal fit in the TCM connectors. If necessary, substitute a known-good TCM and recheck.
NO-Check for an open in the wire between TCM connector terminal B18 and the creep aid system solenoid valve B. If the wire is OK, replace the creep aid system solenoid valves A and B.