Inspection Procedure H-3
Rear Wiper and Washer: When the selector lever is moved to "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode."R" Position During Rear Wiper Operation Circuit:
CIRCUIT OPERATION
The ETACS-ECU operates the rear wiper consecutively approximately twice when the selector lever is moved to "R" position while the rear wiper is turned on.
TECHNICAL DESCRIPTION (COMMENT)
If the rear wiper does not work consecutively approximately twice, the transmission range switch ("R" position) or the ETACS-ECU may be defective.
TROUBLESHOOTING HINTS
- The transmission range switch may be defective
- The ETACS-ECU may be defective
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector.
DIAGNOSIS
Required Special Tools:
- MB991223: Harness Set
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991911: MUT-III Main Harness B
- MB991862: SWS monitor kit
STEP 1. Verify the rear wiper.
Q: Does the rear wiper operate?
YES: Go to Step 2.
NO: Refer to Inspection Procedure H-1 "Rear wiper does not work at all."
STEP 2. Check the input signal by using "FUNCTION DIAG." menu of the SWS monitor.
Set each switch to the following condition before checking input signal from the transmission range switch ("R" position).
- Ignition switch: ON
- Rear wiper switch: ON
- Shift position: R position
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. Connect the DLC harness before connecting the column-ECU harness. Be sure to connect SWS monitor kit MB991862 after turning on scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector.
2. Connect SWS monitor kit MB991862 to the column switch connector.
3. Operate scan tool MB991958 according to the procedure below to display "REV. INTERLOCK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "REAR WIPER."
6. Select "REV. INTERLOCK."
4. Check that normal conditions are displayed on the item described in the table.
Q: Is normal condition displayed?
YES: Replace the ETACS-ECU. When the selector lever is moved to the "R" position, the rear wiper should operate consecutively approximately twice.
NO: Refer to Inspection Procedure N-3 "ETACS-ECU does not receive a signal from the backup light switch