Inspection Procedure 6
Inspection Procedure 6: When "ON/OFF" Switch is Turned "ON", "CRUISE" Indicator Light Inside Combination Meter does not Illuminate (However, Auto-cruise Control System is Normal).Auto-cruise Control Indicator Light Drive Circuit Part 1:
Auto-cruise Control Indicator Light Drive Circuit Part 2:
CIRCUIT OPERATION
The ECM detects "ON/OFF" switch "ON" signal to illuminate the "CRUISE" indicator light on the combination meter.
COMMENT
Connector(s), wiring harness in the CAN bus line between the ECM and the combination meter, power supply to the ECM, the combination meter, the ETACS-ECU, the ECM may be defective.
TROUBLESHOOTING HINTS
Malfunction of the combination meter.
Damaged harness or connector.
Malfunction of the ETACS-ECU
Malfunction of the ECM
DIAGNOSIS
Required Special Tools:
MB991958: Scan Tool (M.U.T.-III Sub Assembly)
MB991824: V.C.I.
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
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.
1. Connect scan tool MB991958 to the data link connector.
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.
5. Disconnect scan tool MB991958.
Q: Is the check result satisfactory?
YES: Go to Step 2
NO: Repair the CAN bus lines. Then go to Step 5.
STEP 2. Using scan tool MB991958, read the MFI system diagnostic trouble code.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system diagnostic trouble code (Refer to Diagnostic Function - How to Read and Erase Diagnostic Trouble Codes). Reading Diagnostic Trouble Codes
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U0141 set?
YES: Refer to Diagnostic Trouble Code Procedures - DTC U0141: ETACS-ECU Time Out. Then go to Step 5. U0141
NO: Go to Step 3.
STEP 3. Using scan tool MB991958, read the ETACS system diagnostic trouble code.
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Check for ETACS system diagnostic trouble code (Refer to Diagnostic Function - How to Read and Erase Diagnostic Trouble Codes).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U0155 set?
YES: Refer to Diagnostic Trouble Code Procedures - DTC U0155: Combination Meter CAN Time-out. Then go to Step 5.
NO: Go to Step 4.
STEP 4. Retest the system.
Q: Does the "CRUISE" indicator light illuminate when the "ON/OFF" switch is turned "ON"?
YES: It can be assumed that this malfunction is intermittent.
NO: Replace the ECM. When the ECM is replaced, register the encrypted code (Refer to Diagnosis - ID Code Registration Necessity Judgment Table). Then go to Step 5.
STEP 5. Retest the system.
Q: Does the "CRUISE" indicator light illuminate when the "ON/OFF" switch is turned "ON"?
YES: The procedure is complete.
NO: Return to Step 1.