Inspection Procedure H-3

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.

NOTE:
This troubleshooting procedure requires use of scan tool MB991958 and SWS monitor kit MB991813. For details on how to use the SWS monitor, refer to "How to use SWS monitor How to Use SWS Monitor."






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 backup light switch may be defective
- The ETACS-ECU may be defective
- The wiring harness may be damaged or the connectors may have loose, corroded or damaged terminals, pushed back in the connector


DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles communication interface (V.C.I.)
- MB991827: M.U.T.-III USB cable
- MB991911: M.U.T.-III Main harness B
- MB991813: SWS monitor kit
- MB991806: SWS monitor cartridge
- MB991812: SWS monitor harness (for column-ECU)
- MB991922: Probe harness

STEP 1. Verify the rear wiper.

Q. Does the rear wiper operate?

YES [M/T] : Go to Step 2.
YES [A/T] : Go to Step 3.
NO [Rear wiper does not work.] : Refer to Inspection Procedure H-1 "Rear wiper does not work at all Inspection Procedure H-1."
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 backup light switch.

- 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 special tool MB991910 before connecting special tool MB991812. Be sure to connect special tool MB991806 after turning on special tool MB991824.









(1)Connect the special tool. Refer to "How to connect SWS monitor How to Connect SWS Monitor."
(2)Operate scan tool MB991958 according to the procedure below to display "REV.INTER LOCK."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "SWS MONITOR."

.....Select "Function Diag."

.....Select "REAR WIPER."

.....Select "REV.INTER LOCK."
(3)Check that normal conditions are displayed on the item described in the table below.





Q. Are normal conditions displayed?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Immobilizer System. When the selector lever is moved to the "R" position, the rear wiper should operate consecutively approximately twice.

NO Refer to Inspection Procedure M-4 "ETACS-ECU does not receive "R" position signal from the backup light switch [M/T] Inspection Procedure M-4 ."

STEP 3. Using scan tool MB991958, diagnose the CAN bus line.





(1)
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 scan tool MB991958. Refer to "How to connect SWS monitor How to Connect SWS Monitor."
(2)Turn the ignition switch to the "ON" position.
(3)Diagnose the CAN bus line.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the CAN bus line found to be normal?

YES Go to Step 4.

NO Repair the CAN bus line CAN Bus Diagnostics Chart).

STEP 4. Using scan tool MB991958, read the PCM [A/T] diagnostic trouble code.





Check whether engine and automatic transaxle DTCs are set or not.
(1)Turn the ignition switch to the "ON" position.
(2)Check for engine and automatic transaxle DTCs.
(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Diagnose the PCM [A/T] Multiport Fuel Injection (MFI) [2.4 L engine] or Multiport Fuel Injection (MFI) [3.8 L engine]).

NO Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Immobilizer System. When the selector lever is moved to the "R" position, the rear wiper should operate consecutively approximately twice.