Inspection Procedure
WARNING: This page is about a different variant/trim than selected.
- Check operation (overdrive).
- Drive the vehicle after the engine warms up.
- Check that overdrive ON - OFF occurs by an operation of the O/D switch ON - OFF.
NO , go to ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION [ECT].
YES , go to step 2.
- Inspect terminal voltage (OD).
- Remove the cruise control ECU assy with the connector still connected.
- Turn the ignition switch to ON.
- Disconnect the cruise control ECU assy connector.
- Measure voltage between terminal 14 (OD) of harness side connector of cruise control ECU assy and body ground. See Fig 1.
OK: Voltage: 10-14 V
NG , go to step 5.
OK , go to step 3.
- Inspect terminal voltage (ECT).
- Connect the cruise control ECU assy connector.
- Perform the test drive after engine warms up.
- Check voltage between terminal 6 (ECT), see Fig 2, of cruise control ECU assy connector and body ground when O/D switch is ON and OFF. See 2ZZ-GE: .
OK:
2ZZ-GE:O/D Switch Position Voltage On 8-16V Off Below 0.5V
OK proceed to next circuit inspection shown on problem symptoms table. See PROBLEM SYMPTOMS TABLE under PROBLEM SYMPTOMS TABLE.
NG , go to step 4
- check harness and connector (between cruise control ECU assy and electronically control).
- Check for open and short circuit in harness and connector between cruise control ECU assy and electronically controlled transmission solenoid. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
NO , repair or replace harness or connector.
OK , check and replace cruise control ECU assy. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
- Check harness and connector (between cruise control ECU assy and ECM).
- Check for open and short circuit in harness and connector between cruise control ECU assy and ECM. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .
NG , repair or replace harness or connector.
OK
OK , check and replace cruise control ECU assy. See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS .