Inspection Procedure M-8

ETACS-ECU does not Receive a Signal from the Vehicle Speed Sensor.

Vehicle Speed Sensor Input Circuit:

CIRCUIT OPERATION
The ETACS-ECU controls the windshield intermittent wiper interval according to the vehicle speed sensor signal.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the wiper interval, which is described in "CIRCUIT OPERATION", will not be changed correctly. If the signal is not normal, the vehicle speed sensor or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS
- Vehicle speed sensor
- Malfunction of the ETACS-ECU
- Damaged harness wipes or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)

STEP 1. Check that the combination meter (speedometer) works normally.

Q: Does the combination meter (speedometer) work normally?

YES: Go to Step 2.

NO: Refer to Inspection Procedure L-7 "ETACS-ECU does not receive a signal from the windshield mist switch."







STEP 2. Check ETACS-ECU connector C-228 and vehicle speed sensor connector B-04 for damage.

Q: Are ETACS-ECU connector C-228 and vehicles speed sensor connector B-04 in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.










STEP 3. Check the wiring harness between ETACS-ECU connector C-228 and vehicle speed sensor connector B-04.

NOTE: Also check intermediate connector C-124 and joint connector C-21. If intermediate connector C-124 or joint connector C-21 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between ETACS-ECU connector C-228 and vehicle speed sensor connector B-04 in good condition?

YES: Replace the ETACS-ECU. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.

NO: Repair the wiring harness. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.

ETACS-ECU does not Receive Vehicle Speed Signal

Vehicles Speed Signal Input Circuit:

CIRCUIT OPERATION
The ETACS-ECU controls the windshield intermittent wiper interval according to the vehicle speed signal, which the powertrain control module sends.

TECHNICAL DESCRIPTION (COMMENT)
If the signal is not normal, the wiper interval, which is described in "CIRCUIT OPERATION", will not be changed correctly. If the signal is not normal, the
powertrain control module or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS
- powertrain control module
- Malfunction of the ETACS-ECU
- Damaged harness wipes or connectors

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set
- MB991502: Scan Tool (MUT-II)

STEP 1. Check that the combination meter (speedometer) works normally.

Q: Does the combination meter (speedometer) work normally?

YES: Go to Step 2.

NO: Refer to Inspection Procedure L-7 "ETACS-ECU does not receive a signal from the windshield mist switch."

STEP 2. Check ETACS-ECU connector C-228 and powertrain control module connector C-116 for damage.

Q: Are ETACS-ECU connector C-228 and powertrain control module connector C-116 in good condition?

YES: Go to Step 3.

NO: Repair or replace the connector. Refer to Harness Connector Inspection. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.

STEP 3. Check the wiring harness between ETACS-ECU connector C-228 and powertrain control module connector C-116.

NOTE: Also check intermediate connector C-124 and joint connector C-21. If intermediate connector C-124 or joint connector C-21 is damaged, repair or replace the connector as described in Harness Connector Inspection.

Q: Is the wiring harness between ETACS-ECU connector C-228 and powertrain control module connector C-116 in good condition?

YES: Replace the ETACS-ECU. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.

NO: Repair the wiring harness. If the wiper interval can be adjusted normally, it indicates that the windshield intermittent wiper interval adjusting knob should send a signal to the ECU.