CAUTIONCOMMENTS ON TROUBLE SYMPTOM
If the rear wiper does not work normally, the input signal circuits to the components
below, the rear wiper motor or the ETACS-ECU may be defective.- Ignition switch (ACC)
- Rear wiper switch
POSSIBLE CAUSES
- Malfunction of the rear wiper motor
- Malfunction of the column switch
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. ECU check by using the SWS monitor
- Ignition switch: ACC
ECUS TO BE CHECKED
- COLUMN ECU
- ETACS ECU
OK: "OK" are displayed for all the items
Q: Is the check result normal?
"OK" are displayed for all the items:
Go to Step 2
."NG" is displayed on the "COLUMN ECU" menu.: Refer to Inspection Procedure A-2 "Communication with column switch (column-ECU) is not possible
.""NG" is displayed on the "ETACS ECU" menu.: Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible
."Step 2. Function diagnosis by using the SWS monitor
<Selected item>
REAR WIPER
- Ignition switch: ACC
- Rear wiper switch: ON
| Item No. |
Item name |
Normal condition |
|---|---|---|
| Item 13 |
REAR WIPER SW |
ON |
| Item 31 |
IG SW (ACC) |
ON |
OK: Normal conditions are displayed for all the items.
Q: Is the check result normal?
Normal conditions displayed for all the items:
Go to Step 3.Normal condition is not displayed for item No.13: Replace the column switch.
Normal condition is not displayed for item No.31: Refer to Inspection Procedure P-1 "The ignition switch (ACC) signal is not received
."Step 5. Measure the resistance at the F-02 rear wiper motor connector.
- Disconnect the connector, and measure at the wiring harness side.
- Resistance between F-02 rear wiper motor connector terminal No.1 and body earth
OK: 2 Ω
or less
Q: Is the check result normal?
YES:
Go to Step 7.NO: Go to Step 6
.Step 6. Check the wiring harness between F-02 rear wiper motor connector
terminal No.1 and body earth.
NOTE: Prior to the wiring harness inspection, check intermediate connector F-05 and repair if
necessary.
- Check the earth line for open or short 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.
Step 8. Check the wiring harness between C-217 ETACS-ECU connector
terminal No.16 and F-02 rear wiper motor connector terminal No.2.
NOTE: Prior to the wiring harness inspection, check intermediate connector F-05 and junction
block connectors C-209 <L.H. drive vehicles>, C-221 <R.H. drive vehicles>
and repair
if necessary.
- Check the power supply line for open or short circuit.
Q: 1Is the check result normal?
YES:
Go to Step 9.NO: Repair the wiring harness.