Inspection Procedure 7
INSPECTION PROCEDURE 7: When "ON/OFF" Switch is Turned ON, "CRUISE" Indicator Light Inside Combination Meter 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 on the combination meter.
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
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
CAUTION:
- If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines.
- Whenever the ECM is replaced, ensure that the CAN bus lines are normal.
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. Scan Tool Connecting
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line. How to 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 (Refer to Controller Area Network, Diagnosis-Can Bus Diagnostic Chart). 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. Scan Tool Connecting
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system DTC (Refer to MFI, Diagnosis-Diagnostic Function). Diagnostic Function
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U0141 set?
YES : Refer to MFI, Diagnosis, Diagnostic Trouble Code Procedures-DTC U0141: ETACS-ECU CAN Communication Time Out. 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. Scan Tool Connecting
2. Turn the ignition switch to the "ON" position.
3. Check for ETACS system DTC (Refer to Chassis Electrical, ETACS, Troubleshooting Diagnostic Function).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U0155 set?
YES : Refer to Chassis Electrical, ETACS, Troubleshooting, Diagnostic Trouble Code Procedures-DTC U0155: Combination Meter-ECU CAN Communication Time. Then go to Step 6.
NO : Go to Step 4.
STEP 4. Using scan tool MB991958, check the combination meter system data list item F7: Cruise control indicator.
1. Connect scan tool MB991958 to the data link connector. Scan Tool Connecting
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to data reading mode for combination meter system item F7: Cruise control indicator (Refer to Chassis Electrical, Combination Meter Data List Reference Table).
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 5.
NO : Repair the combination meter system (Refer to Chassis Electrical, 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. 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 (Refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points-How to Cope with Intermittent Malfunction).
NO : Replace the ECM [Refer to MFI, Engine Control Module (ECM)]. When the ECM is replaced, register the encrypted code (Refer to Wireless Control Module, Diagnosis-ID Code Registration Judgment Table). Then go to Step 6.
STEP 6. 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.