P1850
DTC P1850: Problem in Creep Aid System Solenoid Valve A Circuit2005 Model
NOTE:
^ Record all freeze data and review General Troubleshooting Information before you troubleshoot.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
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 B11 and A4 or A17.
Is there voltage?
YES- Repair short to power in the wire between TCM connector terminal B11 and the creep aid system solenoid valve A.
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 B11 and A4 or A17.
Is there continuity?
YES- Repair short to ground in the wire between TCM connector terminal B11 and the creep aid system solenoid valve A.
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 B11 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, 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 B11 and the creep aid system solenoid valve A. If the wire is OK, replace the creep aid system solenoid valves A and B.