P1816

DTC P1816

DTC Detecting Condition and Trouble Area






Wiring Diagram










DTC Confirmation Procedure

NOTE:

Check that the following conditions are satisfied when using this procedure.

- Battery voltage > 10.5 V

1) Turn ignition switch to ON position for 10 sec.

DTC Troubleshooting

1.
Was "CVT System Check" performed?
YES -
Go to Step 2.
NO -
Go to CVT System Check CVT System Check.

2. Stepper motor 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 stepper motor drive circuit (A1 - A4) is as follows.
- Wiring harness resistance of stepper motor circuit is less than 1 ohms.
- Insulation resistance of stepper motor circuit is infinity between solenoid connector and vehicle body ground.
- Insulation resistance of wire harness is infinity between stepper motor drive circuit terminal and each terminal at solenoid connector.
- Circuit voltage of stepper motor circuit is 0 - 1 V with ignition switch in ON position.

Are they in good condition?
YES -
Go to Step 3.
NO -
Repair or replace defective wire harness.

3. Stepper motor check

Turn ignition switch to "OFF" position.
Disconnect connector (1) from solenoid harness.
Check for proper terminal connection to solenoid connector.
Check resistance of stepper motor circuit as follows.

Stepper motor resistance:
Between terminals "1" and "15" of solenoid connector: Approx. 30 ohms at 20 °C (68 °F)
Between terminals "13" and "14" of solenoid connector: Approx. 30 ohms at 20 °C (68 °F)
Between terminal "1" of solenoid connector and transaxle: Approx. 15 ohms at 20 °C (68 °F)
Between terminal "15" of solenoid connector and transaxle: Approx. 15 ohms at 20 °C (68 °F)
Between terminal "13" of solenoid connector and transaxle: Approx. 15 ohms at 20 °C (68 °F)
Between terminal "14" of solenoid connector and transaxle: Approx. 15 ohms at 20 °C (68 °F)





Is it in good condition?
YES -
Substitute a known-good TCM and recheck.
NO -
Replace stepper motor (valve body assembly).