CAUTIONCOMMENTS ON TROUBLE SYMPTOM
Input signal from the inhibitor switch (reverse position) is used to operate the rear wiper. If the signal is abnormal, the rear wiper will not work normally.POSSIBLE CAUSES
- Malfunction of the inhibitor switch
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 3. Measure the voltage at the C-220 ETACS-ECU connector.
- Disconnect the connector, and measure at the wiring harness side.
- Ignition switch: ON
- Shift position: R position
- Voltage between C-220 ETACS-ECU connector terminal No.39 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Replace the ETACS-ECU.NO: Go to Step 4
.Step 4. Measure the voltage at the B-22 inhibitor switch connector.
- Disconnect the connector, and measure at the wiring harness side.
- Ignition switch: ON
- Voltage between B-22 inhibitor switch connector terminal No.8 and body earth
OK: Battery positive voltage
Q: Is the check result normal?
YES:
Go to Step 5.NO: Go to Step 6
.Step 5. Check the wiring harness between B-22 inhibitor switch connector terminal No.7 and C-220 ETACS-ECU connector terminal No.39.
NOTE: Prior to the wiring harness inspection, check joint connector C-02 and intermediate connector C-105, and repair if necessary.
- Check the input line for open circuit.
Q: Is the check result normal?
YES:
Go to Step 7.NO: Repair the wiring harness.
Step 6. Check the wiring harness between B-22 inhibitor switch connector terminal No.8 and the ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-106, joint connector C-16 and junction block connectors C-202 and C-203, and repair if necessary.
- Check the power supply line to the ignition switch (IG1) for open circuit.
Q: Is the check result normal?
YES:
The trouble can be an intermittent malfunction (Refer to GROUP 00 -
How to Cope with Intermittent Malfunction 
).NO: Repair the wiring harness.