DTC Troubleshooting

DTC P1810 TROUBLESHOOTING CHART

Step	Action	YES	NO
1	Was "CVT System Check" performed?	Go to Step 2.	Go to CVT SYSTEM CHECK .
2	Lock-up/select switching solenoid valve drive circuit check Turn off ignition switch and disconnect TCM and solenoid connectors. Check for proper terminal connection to TCM and solenoid connectors. If connections are OK, check that lockup/select switching solenoid valve drive circuit (A1) is as follows. Wiring harness of lock-up/select switching solenoid valve drive circuit is less than 1 Ω. Insulation resistance of lock-up/select switching solenoid valve drive circuit is infinity between solenoid connector and vehicle body ground. Insulation resistance of wire harness is infinity between lock-up/select switching solenoid valve drive circuit terminal and each terminal at solenoid connector. Circuit voltage of lock-up/select switching solenoid valve drive circuit 0 - 1 V with ignition switch ON position. Are they in good condition?	Go to Step 3.	Repair or replace defective wire harness.
3	Lock-up/select switching solenoid valve check Check resistance of lock-up/select switching solenoid valve. See Solenoid Valve On-Vehicle Inspection Is it in good condition?	Substitute a known-good TCM and recheck.	Replace lock-up/select switching solenoid valve (CVT assembly).