Inspection Procedure 6

INSPECTION PROCEDURE 6: When "CRUISE" (MAIN) 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 PCM detects "CRUISE" (MAIN) 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 PCM and the combination meter, power supply to the PCM, the combination meter, the PCM may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the combination meter.
- Damaged harness or connector.
- Malfunction of the PCM.

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. 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 CAN, Diagnosis - Can Bus Diagnostic Chart). Then go to Step 4.

STEP 2. Using scan tool MB991958, read the MFI diagnostic trouble code.






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. Check for MFI system diagnostic trouble code (Refer to MFI Diagnosis - Diagnostic Function - How to Read and Erase Diagnostic Trouble Code) With Manufacturer's Scan Tool [2.4L engine] or (Refer to MFI Diagnosis - Diagnostic Function - How to Read and Erase Diagnostic Trouble Code) [3.8L engine].

4. Turn the ignition switch to the "LOCK" (OFF) position. (5) Disconnect scan tool MB991958.

Q: Is DTC U1108 set?

YES : Refer to MFI Diagnosis - Diagnostic Trouble Code Procedures - DTC U1108: Combination Meter-ECU CAN Communication Time Out U1108 [2.4L engine] or Refer to MFI Diagnosis - Diagnostic Trouble Code Procedures - DTC U1108: Combination Meter-ECU CAN Communication Time Out [3.8L engine]. Then go to Step 4.

NO : Go to Step 3.

STEP 3. Retest the system.

Q: Does the "CRUISE" indicator light illuminate when the "CRUISE" (MAIN) switch is turned "ON"?

YES : It can be assumed that this malfunction is intermittent. (Refer to General, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction).

NO : Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to Chassis Electrical, Ignition Switch - Encrypted Code Registration Criteria Table. Then go to Step 4.

STEP 4. Retest the system.

Q: Does the "CRUISE" indicator light illuminate when the "CRUISE" (MAIN) switch is turned "ON"?

YES : The procedure is complete.

NO : Return to Step 1.