Inspection Procedure 11

Inspection Procedure 11: When The "ON/OFF" Switch Is Turned ON, "CRUISE" Indicator Light Does Not Illuminate (However, Cruise Control System Is Normal.)

CIRCUIT OPERATION
- The ECM detects "ON/OFF" switch ON signal to illuminate the "CRUISE" indicator light.
- The "CRUISE" indicator light illuminate signal is transmitted from the ECM to the combination meter via CAN bus line.

COMMENT
- The CAN bus line between the ECM and the ETACS-ECU and between the ETACS-ECU and the combination meter may be defective.
- The combination meter, ETACS-ECU or ECM may also be defective.

TROUBLESHOOTING HINTS
- Malfunction of CAN bus system.
- Damaged harness or connector.
- Malfunction of the combination meter.
- Malfunction of the ETACS-ECU.
- Malfunction of the ECM.

DIAGNOSTIC PROCEDURE

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

CAUTION: If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code (DTC) may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to Trouble code diagnosis.) Scan Tool Testing and Procedures

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. How to Connect the Scan Tool (M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line. How to Diagnose the CAN Bus Line

Q: Is the check result satisfactory?

YES : Go to Step 2.

NO : Repair the CAN bus lines (Refer to Diagnosis - Can Bus Diagnostic Chart.) CAN Bus Diagnostics Table Then go to Step 6.

STEP 2. Using scan tool MB991958, check for MFI system DTC.

1. Connect scan tool MB991958 to the data link connector. How to Connect the Scan Tool (M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system DTC (Refer to MFI Diagnosis - Diagnostic Function) [2.0L ENGINE] Diagnostic Function or (Refer to MFI Diagnosis - Diagnostic Function) [2.4L ENGINE.] Diagnostic Function

Q: Is DTC U0141 set?

YES : Repair the MFI system (Refer to MFI Diagnosis, Diagnostic Trouble Code Procedures - DTC U0141: ETACS-ECU CAN Communication Time Out) [2.0L ENGINE] U0141 or (Refer to MFI Diagnosis, Diagnostic Trouble Code Procedures - DTC U0141: ETACS-ECU CAN Communication Time Out) [2.4L ENGINE.] U0141 Then go to Step 6.

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, check for ETACS system DTC.

1. Connect scan tool MB991958 to the data link connector. How to Connect the Scan Tool (M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Check for ETACS system DTC (Refer to ETACS, Troubleshooting - Diagnostic Function.) Reading and Clearing Diagnostic Trouble Codes

Q: Is DTC U0155 set?

YES : Repair the ETACS system (Refer to ETACS, Troubleshooting, Diagnostic Trouble Code Procedures - DTC U0155: Combination Meter-ECU CAN Communication Time Out.) ETACS Then go to Step 6.

NO : Go to Step 4.

STEP 4. Using scan tool MB991958, check the combination meter system actuator test item 7: Cruise indicator 1.

1. Connect scan tool MB991958 to the data link connector. How to Connect the Scan Tool (M.U.T.-Iii.)
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to check the actuator test for combination meter system item 7: indicator 1 (Refer to Combination Meter, Troubleshooting - Actuator Test Table.) Actuator Test Table

Q: Is the check result satisfactory?

YES : Go to Step 5.

NO : Repair the combination meter system (Refer to Combination Meter, Troubleshooting, Symptom Procedures - Inspection Procedure 5: The combination meter light does not illuminate normally or the multi information display is not displayed normally.) Inspection Procedure 5 Then go to Step 6.

STEP 5. Check the symptoms.

Q: When the "ON/OFF" switch is turned ON, is the "CRUISE" indicator light illuminated?

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 Judgment Table.) ID Codes Registration Judgment Table Then go to Step 6.

STEP 6. Check the symptoms.

Q: When the "ON/OFF" switch is turned ON, is the "CRUISE" indicator light illuminated?

YES : The procedure is complete.

NO : Return to Step 1.