Inspection Procedure 3

INSPECTION PROCEDURE 3: When the selector lever is moved to "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode.


























CIRCUIT OPERATION

The ETACS-ECU operates the rear wiper consecutively 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, the transmission range switch ("R" position) or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

- The back-up 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

STEP 1. Verify the rear wiper.

Check that the rear wiper system works normally by operating the rear wiper switch.

Q. Does the rear wiper operate?

YES [CVT, A/T] : Go to Step 2.
YES [M/T, TC-SST] : Go to Step 4.
NO [Rear wiper does not work.] : Refer to Inspection Procedure 1 "Rear wiper does not work at all Inspection Procedure 1."
STEP 2. Use the scan tool MB991958 to diagnose the CAN bus lines.





Connect the scan tool. Reading and Clearing Diagnostic Trouble Codes."

Q. Is the check result normal?

YES Go to Step 3.

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

STEP 3. Use the scan tool MB991958 to diagnose other system diagnostic trouble code

Check that the CVT-ECU sets a diagnostic trouble code.

Q. Is the diagnostic trouble code set?

YES Diagnose the CVT-ECU ).
NO Go to Step 10.
STEP 4. Connector check: B-110 Back-up light switch [M/T] or C-49 shift lever [TC-SST] connector

Q. Is the check result normal?

YES Go to Step 5.
NO Repair the damaged connector.
STEP 5. Back-up light switch [M/T] or shift lever [TC-SST] check

Check that the back-up light switch [M/T] ) or shift lever [TC-SST] Shift Lever Operation Check) operates normally.

Q. Is the check result normal?

YES Go to Step 6.
NO Replace the back-up light switch.
STEP 6. Voltage measurement at the B-110 back-up light switch [M/T] or C-49 shift lever [TC-SST] connector

(1)Disconnect the connector, and measure at the wiring harness-side connector.

(2)Turn the ignition switch to the ON position.

(3)Measure the voltage between the B-110 back-up light switch [M/T] connector terminal No. 2 or C-49 shift lever [TC-SST] connector terminal No. 4 and body ground.
OK: Battery positive voltage


Q. Is the check result normal?

YES Go to Step 8.
NO Go to Step 7.
STEP 7. Check the wiring harness between B-110 back-up light switch [M/T] connector terminal No. 2 or C-49 shift lever [TC-SST] connector terminal No. 4 and the ignition switch (IG1).

NOTE:
Prior to the wiring harness inspection, check intermediate connector A-10, intermediate connector C-39, and junction block connector C-313 and C-317, and repair if necessary.

- Check the power supply line for open circuit.

Q. Is the check result normal?

YES Go to Step 10.
NO Repair the wiring harness.
STEP 8. Check ETACS-ECU connector C-304 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is ETACS-ECU connector C-304 in good condition?

YES Go to Step 9.
NO Repair the damaged connector.
STEP 9. Check the wiring harness between B-110 back-up light switch [M/T] connector terminal No. 1 or C- 49 shift lever [TC-SST] connector terminal No. 3 and C-304 ETACS-ECU connector terminal No. 2.

NOTE:
Prior to the wiring harness inspection, check intermediate connector A-10, and repair if necessary.

- Check the output lines for open circuit and short circuit.

Q. Is the check result normal?

YES Go to Step 10.
NO Repair the wiring harness.
STEP 10. Retest the system.

Check that the rear wiper operates continuously when the selector lever is moved to the R position during the rear wiper operation.

Q. Is the check result normal?

YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace the ETACS-ECU.