DTC 15: Cruise Control Switch System: 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
MB991223: Harness Set
MB992006: Extra Fine Probe
MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool MB991958, check the data list item 75: Cancel switch, item 86: Main switch, item 91: Resume switch and item 92: Set switch.
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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to data reading mode for cruise control system (Refer to HOW TO ERASE 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.
    
    Fig 1: Connecting Scan Tool MB991958 To Data Link Connector
    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    - 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."
Q: Is the switch operating properly?
1. YES: Go to Step 25.
2. NO: Go to Step 2.
STEP 2. Measure the power supply voltage at cruise control switch connector C-203 by backprobing.
1. Remove the cruise control switch from the steering wheel with the cruise control switch connector connected (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE NON-TURBO, 2.4L ENGINE > ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE TURBO > ) < 2.0L ENGINE Turbo >.
2. Connect the negative (-) battery cable that was disconnected when the driver's air bag module was removed.
3. Do not disconnect cruise control switch connector C-203.
4. Turn the ignition switch to the "ON" position.
5. Do not operate the cruise control switch.
6. Measure the power supply voltage between cruise control switch connector C-203 terminal number 3 and body ground by backprobing.
Q: Is the measured voltage between 4.7 and 5.0 V?
1. YES: Go to Step 14.
2. NO: Go to Step 3.
STEP 3. Measure the power supply voltage at ECM connector B-109.
1. Disconnect the ECM connectors [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Non-turbo >, [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Turbo >, or [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.4L ENGINE >.
2. Connect special tool MB992110 between the ECM and the body-side harness connector.
3. Turn the ignition switch to the "ON" position.
4. Do not operate the cruise control switch.
  
  Fig 2: Connecting Special Tool MB992110 Between ECM And Body-Side Harness Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. Measure the power supply voltage between special tool 48-pin connector terminal number 107 (ECM connector B-109 terminal number 107) and body ground.
Q: Is the measured voltage between 4.7 and 5.0 V?
1. YES: Go to Step 10.
2. NO: Go to Step 4.
  
  Fig 3: Measuring Power Supply Voltage Between Special Tool 48-Pin Connector Terminal Number 107 And Body Ground
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Check ECM connector B-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connector and terminal in good condition?
1. YES: Go to Step 5.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 5. Check the harness wire for short circuit to body ground between the ECM connector B-109 terminal number 107 and the cruise control switch connector C-203 terminal number 3.
1. Disconnect ECM connector B-109 and measure at the harness connector side [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Non-turbo >, [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Turbo >, or [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.4L ENGINE >.
2. Turn the ignition switch to the "LOCK" (OFF) position.
3. Measure the continuity between ECM connector B-109 terminal number 107 and body ground.
Q: Is the measured continuity open circuit?
1. YES: Go to Step 24.
2. NO: Go to Step 6.
STEP 6. Check intermediate connector C-127, cruise control switch connector C-203, and clock spring connectors C-204 and C-205, for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connector and terminal in good condition?
1. YES: Go to Step 7.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 7. Check the harness wire between ECM connector B-109 terminal number 107 and clock spring connector C-205 terminal number 5, and between clock spring connector C-204 terminal number 2 and cruise control switch connector C-203 terminal number 3, for damage.
- Check harness wire for short circuit and damage.
Q: Is the harness wire in good condition?
1. YES: Go to Step 8.
2. NO: Repair or replace the damaged harness wire. Then go to Step 26.
STEP 8. Check the clock spring.
Refer to CLOCK SPRING CHECK < 2.0L ENGINE Non-turbo and 2.4L ENGINE >.

Refer to INSPECTION < 2.0L ENGINE Turbo >.

Q: Is the clock spring in good condition?
1. YES: Go to Step 9.
2. NO: Replace the clock spring (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 9. Check the cruise control switch.
Refer to CRUISE CONTROL SYSTEM COMPONENT CHECK .

Q: Is the cruise control switch in good condition?
1. YES: Go to Step 13.
2. NO: Replace the cruise control switch (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE NON-TURBO, 2.4L ENGINE > ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE TURBO > ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 10. Check ECM connector B-109, intermediate connector C-127, cruise control switch connector C-203, and clock spring connectors C-204 and C-205, for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connectors and terminal in good condition?
1. YES: Go to Step 11.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 11. Check the harness wire between ECM connector B-109 terminal number 107 and clock spring connector C-205 terminal number 5, and between clock spring connector C-204 terminal number 2 and cruise control switch connector C-203 terminal number 3, for damage.
- Check harness wire for open circuit and damage.
Q: Is the harness wire in good condition?
1. YES: Go to Step 12.
2. NO: Repair or replace the damaged harness wire. Then go to Step 26.
STEP 12. Check the clock spring.
Refer to INSPECTION < 2.0L ENGINE Non-turbo and 2.4L ENGINE. >

Refer to INSPECTION < 2.0L ENGINE Turbo >.

Q: Is the clock spring in good condition?
1. YES: Go to Step 13.
2. NO: Replace the clock spring (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 13. Using scan tool MB991958, check the 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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to data reading mode for cruise control system (Refer to HOW TO ERASE 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."
Q: Is the switch operating properly?
1. YES: Go to Step 25.
2. NO: Go to Step 14.
STEP 14. Measure the ground voltage at cruise control switch connector C-203 by backprobing.
1. Remove the cruise control switch from the steering wheel with the cruise control switch connector connected (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE NON-TURBO, 2.4L ENGINE > ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE TURBO > ) < 2.0L ENGINE Turbo >.
2. Connect the negative (-) battery cable that was disconnected when the driver's air bag module was removed.
3. Do not disconnect cruise control switch connector C-203.
4. Turn the ignition switch to the "ON" position.
5. Press and hold the "ON/OFF" switch, and measure the ground voltage between cruise control switch connector C-203 terminal number 2 and body ground by backprobing.
Q: Is the measured voltage 0.5 V or less?
1. YES: Go to Step 20.
2. NO: Go to Step 15.
STEP 15. Measure the ground voltage at ECM connector B-109.
1. Disconnect the ECM connectors [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Non-turbo >, [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Turbo >, or [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.4L ENGINE >.
2. Connect special tool MB992110 between the ECM and the body-side harness connector.
3. Turn the ignition switch to the "ON" position.
4. Press and hold the "ON/OFF" switch, and measure the ground voltage between special tool 48-pin connector terminal number 95 (ECM connector B-109 terminal number 95) and body ground.
Q: Is the measured voltage 0.5 V or less?
1. YES: Go to Step 17.
2. NO: Go to Step 16.
  
  Fig 4: Measuring Voltage Between Special Tool 48-Pin Connector Terminal Number 95 And Body Ground
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 16. Check ECM connector B-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connector and terminal in good condition?
1. YES: Go to Step 24.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 17. Check intermediate connector C-127, cruise control switch connector C-203, and clock spring connectors C-204 and C-205, for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connectors and terminal in good condition?
1. YES: Go to Step 18.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 18. Check the harness wire between ECM connector B-109 terminal number 95 and clock spring connector C-205 terminal number 4, and between clock spring connector C-204 terminal number 3 and cruise control switch connector C-203 terminal number 2, for damage.
- Check harness wire for open circuit and damage.
Q: Is the harness wire in good condition?
1. YES: Go to Step 19.
2. NO: Repair or replace the damaged harness wire. Then go to Step 26.
STEP 19. Check the clock spring.
Refer to INSPECTION < 2.0L ENGINE Non-turbo and 2.4L ENGINE. >

Refer to INSPECTION < 2.0L ENGINE Turbo. >

Q: Is the clock spring in good condition?
1. YES: Go to Step 24.
2. NO: Replace the clock spring (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 20. Check ECM connector B-109, intermediate connector C-127, cruise control switch connector C-203, and clock spring connectors C-204 and C-205, for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to HARNESS CONNECTOR INSPECTION .

Q: Is the connectors and terminal in good condition?
1. YES: Go to Step 21.
2. NO: Repair or replace the damaged connector. Then go to Step 26.
STEP 21. Check the harness wire between ECM connector B-109 terminal number 95 and clock spring connector C-205 terminal number 4, and between clock spring connector C-204 terminal number 3 and cruise control switch connector C-203 terminal number 2, for damage.
- Check harness wire for short circuit and damage.
Q: Is the harness wire in good condition?
1. YES: Go to Step 22.
2. NO: Repair or replace the damaged harness wire. Then go to Step 26.
STEP 22. Check the clock spring.
Refer to INSPECTION < 2.0L ENGINE Non-turbo and 2.4L ENGINE. >

Refer to INSPECTION < 2.0L ENGINE Turbo >.

Q: Is the clock spring in good condition?
1. YES: Go to Step 23.
2. NO: Replace the clock spring (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to DRIVER'S AIR BAG MODULES AND CLOCK SPRING ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 23. Check the cruise control switch.
Refer to CRUISE CONTROL SYSTEM COMPONENT CHECK .

Q: Is the cruise control switch in good condition?
1. YES: Go to Step 24.
2. NO: Replace the cruise control switch (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE NON-TURBO, 2.4L ENGINE > ) < 2.0L ENGINE Non-turbo and 2.4L ENGINE > or (Refer to REMOVAL AND INSTALLATION < 2.0L ENGINE TURBO > ) < 2.0L ENGINE Turbo >. Then go to Step 26.
STEP 24. Using scan tool MB991958, check the 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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to data reading mode for cruise control system (Refer to HOW TO ERASE 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."
Q: Is the switch operating properly?
1. YES: Go to Step 25.
2. NO: Replace the ECM [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Non-turbo >, [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Turbo >, or [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.4L ENGINE >. When the ECM is replaced, register the encrypted code (Refer to ID registration procedure manual - ID codes registration judgement table) < Vehicle with WCM installed >. Then go to Step 26.
STEP 25. Read the 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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
Q: Is DTC 15 set?
1. YES: Replace the ECM [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Non-turbo >, [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.0L ENGINE Turbo >, or [Refer to ENGINE CONTROL MODULE (ECM) ] < 2.4L ENGINE >. When the ECM is replaced, register the encrypted code (Refer to ID registration procedure manual - ID codes registration judgement table) < Vehicle with WCM installed >. Then go to Step 26.
2. NO: It can be assumed that this malfunction is intermittent (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
STEP 26. 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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991958 to data reading mode for cruise control system (Refer to HOW TO ERASE 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."
Q: Is the switch operating properly?
1. YES: Go to Step 27.
2. NO: Return to Step 2.
STEP 27. Read the 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 (Refer to HOW TO ERASE DIAGNOSTIC TROUBLE CODES ).
Q: Is DTC 15 set?
1. YES: Return to Step 1.
2. NO: The procedure is complete.