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Home >> Mitsubishi >> 2009 >> Lancer L4-2.0L (4B11) >> Repair and Diagnosis >> Cruise Control >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Inspection Procedure 6

Inspection Procedure 6

Inspection Procedure 6: Cruise Control System cannot be Set (No Response when the "COAST/SET" Switch and the "ACC/RES" Switch is Pressed.) [2.0L ENGINE Non-turbo, 2.4L ENGINE]

COMMENT
The fail-safe function is probably canceling cruise control system. In this case, checking the cruise control system, MFI system, CVT system and CAN bus line system DTCs. The scan tool MB991958 can also be used to check if the circuits of each input switch are normal or not by checking the input switch codes.

NOTE: Press the cruise control switches one by one securely. Otherwise, the cruise control system may not be started.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CASE:)
- Malfunction of the CAN bus line system.
- Malfunction of the MFI system.
- Malfunction of the CVT system. [CVT]
- Malfunction of the cruise control switch.
- Malfunction of the stoplight switch.
- Malfunction of the clutch switch. [M/T]
- Malfunction of the transmission. range switch [CVT]
- Malfunction of the TCM. [CVT]
- 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 diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines. (Refer to Trouble code diagnosis) Diagnostic Trouble Code Descriptions

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. Then go to Step 10.

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 Diagnostic Function [2.0L ENGINE Non-turbo Diagnostic Function) or (Refer to Diagnostic Function [2.4L ENGINE. Diagnostic Function
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.

Q: Is any DTC set?

YES : Diagnose the MFI system. (Refer to Diagnostic Trouble Code Chart) [2.0L ENGINE Non-turbo> Diagnostic Trouble Code Descriptions) or (Refer to Diagnostic Trouble Code Chart) [2.4L ENGINE> Diagnostic Trouble Code Descriptions Then go to Step 10.

NO : Go to Step 4. [M/T]
NO : Go to Step 3. [CVT]

STEP 3. Using scan tool MB991958, check for CVT system DTC. [CVT]

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 CVT system DTC. (Refer to Diagnostic Funtion Reading and Clearing Diagnostic Trouble Codes)
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.

Q: Is any DTC set?

YES : Diagnose the CVT system. (Refer to Diagnostic Trouble COde Chart Diagnostic Trouble Code Descriptions). Then go to Step 10.

NO : Go to Step 4.

STEP 4. Check for cruise control system DTC.

1. Disconnect the negative (-) battery terminal, to erase the DTC of the cruise control system.
2. Connect the negative (-) battery terminal.
3. Turn the ignition switch to the "ON" position, and press the "ON/OFF" switch to turn the cruise control system to ON (turn on the "CRUISE" indicator light.)
4. After turning the cruise control system to ON, when 2 minutes or more has elapsed without operating the cruise control switches, read the DTC of the cruise control system. Reading Diagnostic Trouble Codes

Q: Is DTC set?

YES : Diagnose the cruise control system. (Refer to Diagnostic Trouble Code Chart Diagnostic Trouble Code Descriptions) Then go to Step 10.

NO : Go to Step 5.

STEP 5. Using scan tool MB991958, check data list item 75: Cancel switch, item 86: Main switch, item 91: Resume switch and item 92: Set switch.

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 cruise control system. Reading Diagnostic Trouble Codes
- Item 75: Cancel switch.
- When "CANCEL" switch is pressed, the display on scan tool MB991958 should be "ON."
- When "CANCEL" switch is released, the display on scan tool MB991958 should be "OFF."

- Item 86: Main switch.
- When the "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON."
- When the "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF."

- Item 91: Resume switch.
- When the "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON."
- When the "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF."

- Item 92: Set switch.
- When the "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON."
- When the "COAST/SET" switch is released, the display on scan tool MB991958 should be "OFF."

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

Q: Is the switch operating properly?

YES : Go to Step 6.

NO : Repair the cruise control switch system. Then go to Step 10.

STEP 6. Using scan tool MB991958, check data list item 74: Brake light switch and item 89: Normally closed brake switch.

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 cruise control system. Reading Diagnostic Trouble Codes
- Item 74: Brake light switch.
- When the brake pedal is depressed, the display on scan tool MB991958 should be "ON."
- When the brake pedal is released, the display on scan tool MB991958 should be "OFF."

- Item 89: Normally closed brake switch.
- When the brake pedal is depressed, the display on scan tool MB991958 should be "ON."
- When the brake pedal is released, the display on scan tool MB991958 should be "OFF."

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

Q: Is the switch operating properly?

YES : Go to Step 7. [M/T]
YES : Go to Step 8. [CVT]

NO : Repair the stoplight switch system. Then go to Step 10.

STEP 7. Using scan tool MB991958, check data list item 78: Clutch switch. [M/T]

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 cruise control system. Reading Diagnostic Trouble Codes
- Item 78: Clutch switch.
- When the clutch pedal is depressed, the display on scan tool MB991958 should be "ON."
- When the clutch pedal is released, the display on scan tool MB991958 should be "OFF."

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

Q: Is the switch operating properly?

YES : Go to Step 9.

NO : Repair the clutch switch system. Then go to Step 10.

STEP 8. Using scan tool MB991958, check data list item 87: Neutral switch. [CVT]

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 cruise control system. Reading Diagnostic Trouble Codes
- Item 88: Neutral switch.
- When selector lever is at the "P" and "N" position, the display on scan tool MB991958 should be "ON."
- When selector lever is other than "P" and "N" position, the display on scan tool MB991958 should be "OFF."

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

Q: Is the switch operating properly?

YES : Go to Step 9.

NO : Repair the transmission range switch system. Then go to Step 10.

STEP 9. Check the symptoms.

Q: Can cruise control system be set?

YES : It can be assumed that this malfunction is intermittent.

NO : Replace the ECM. When the ECM is replaced, register the encrypted code. Then go to Step 10.

STEP 10. Check the symptoms.

Q: Can cruise control system be set?

YES : The procedure is complete.

NO : Return to Step 1.
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