DTC 15
DIAGNOSTIC TROUBLE CODE PROCEDURESDTC 15: Cruise Control Switch System [2.0L ENGINE Non-turbo, 2.4L ENGINE]
Cruise Control Switch Circuit (Part 1):
Cruise Control Switch Circuit (Part 2):
CIRCUIT OPERATION
This circuit judges the signals of each switch ("ON/OFF", "CANCEL", "COAST/SET" and "ACC/RES") of the cruise control switch. The ECM detects the state of the cruise control switch by sensing the voltages shown below.
- When all switches are released: 4.7 - 5.0 volts
- When the "ON/OFF" switch is pressed: 0 - 0.5 volt
- When the "CANCEL" switch is pressed: 1.0 - 1.8 volts
- When the "COAST/SET" switch is pressed: 2.3 - 3.0 volts
- When the "ACC/RES" switch is pressed: 3.5 - 4.2 volts
DTC SET CONDITIONS
Check Condition
- The "CRUISE" indicator light illuminates.
Judgment Criteria
- This DTC is set when the "COAST/SET" switch or "ACC/RES" switch is stuck to ON.
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CASE:)
- Damaged harness or connector.
- Malfunction of the cruise control switch.
- Malfunction of the clock spring.
- 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
- 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. 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 20.
NO: Go to Step 2.
STEP 2. Measure the power supply voltage at cruise control switch connector C-203 by backprobing.
1. Remove the driver's air bag module.
2. Remove the cruise control switch from the steering wheel with the cruise control switch connector connected.
3. Connect the negative (-) battery cable that was disconnected when the driver's air bag module was removed.
4. Do not disconnect cruise control switch connector C-203.
5. Turn the ignition switch to the "ON" position.
6. Do not operate the cruise control switch.
7. Measure the power supply voltage between cruise control switch connector C-203 terminal number 3 and ground by backprobing.
8. Turn the ignition switch to the "LOCK" (OFF) position.
9. Install the cruise control switch to the steering wheel.
Q: Is the measured voltage between 4.7 and 5.0 volts?
YES: Go to Step 10.
NO: Go to Step 3.
STEP 3. Measure the power supply voltage at ECM connector B-109.
1. Disconnect the ECM connectors.
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.
5. Measure the power supply voltage between special tool 48-pin connector terminal number 107 (ECM connector B-109 terminal number 107) and ground.
6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Disconnect special tool MB992110 between the ECM and the body-side harness connector.
8. Connect the ECM connectors.
Q: Is the measured voltage between 4.7 and 5.0 volts?
YES: Go to Step 6.
NO: Go to Step 4.
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. Connector Continuity and Voltage Test
Q: Is the connector and terminal in good condition?
YES: Go to Step 5.
NO: Repair or replace the damaged connector. Install the driver's air bag module. Then go to Step 21.
STEP 5. Check the harness for short circuit to 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.
2. Turn the ignition switch to the "LOCK" (OFF) position.
3. Measure the continuity between ECM connector B-109 terminal number 107 and ground.
4. Reconnect ECM connector B-109.
Q: Is the measured continuity open circuit?
YES: Install the driver's air bag module Then go to Step 19.
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. Connector Continuity and Voltage Test
Q: Is the connector and terminal in good condition?
YES : Go to Step 7.
NO: Repair or replace the damaged connector. Install the driver's air bag module. Then go to Step 21.
STEP 7. Check the harness wire between ECM connector B-109 terminal number 107 and cruise control switch connector C-203 terminal number 3, for damage.
Q: Is the harness wire in good condition?
YES: Go to Step 8.
NO: Repair the damaged harness wire. Install the driver's air bag module. Then go to Step 21.
STEP 8. Check the clock spring.
Refer to Driver's Air Bag Modules and Clock Spring Inspection. Inspection
Q: Is the clock spring in good condition?
YES : Go to Step 9.
NO : Replace the clock spring and install the driver's air bag module. Then go to Step 21.
STEP 9. 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. 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 : It can be assumed that this malfunction is intermittent. Install the driver's air bag module.
NO : Return to Step 2.
STEP 10. 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.
2. Do not disconnect cruise control switch connector C-203.
3. Turn the ignition switch to the "ON" position.
4. Press and hold the "ON/OFF" switch, and measure the ground voltage between cruise control switch connector C-203 terminal number 2 and ground by backprobing.
5. Release the "ON/OFF" switch.
6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Install the cruise control switch to the steering wheel.
Q: Is the measured voltage 0.5 volt or less?
YES : Go to Step 17.
NO : Go to Step 11.
STEP 11. Measure the ground voltage at ECM connector B-109.
1. Disconnect the ECM connectors.
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 ground.
5. Release the "ON/OFF" switch.
6. Turn the ignition switch to the "LOCK" (OFF) position.
7. Disconnect special tool MB992110 between the ECM and the body-side harness connector.
8. Connect the ECM connectors.
Q: Is the measured voltage 0.5 volt or less?
YES : Go to Step 13.
NO : Go to Step 12.
STEP 12. Check ECM connector B-109 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to Harness Connector Inspection. Connector Continuity and Voltage Test
Q: Is the connector and terminal in good condition?
YES : Install the driver's air bag module. Then go to Step 19.
NO : Repair or replace the damaged connector. Install the driver's air bag module. Then go to Step 21.
STEP 13. 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. Connector Continuity and Voltage Test
Q: Is the connectors and terminal in good condition?
YES : Go to Step 14.
NO : Repair or replace the damaged connector. Install the driver's air bag module. Then go to Step 21.
STEP 14. Check the harness wire between ECM connector B-109 terminal number 95 and cruise control switch connector C-203 terminal number 2, for damage.
Q: Is the harness wire in good condition?
YES : Go to Step 15.
NO : Repair the damaged harness wire. Install the driver's air bag module. Then go to Step 21.
STEP 15. Check the clock spring.
Refer to Driver's Air Bag Modules and Clock Spring Inspection. Inspection
Q: Is the clock spring in good condition?
YES : Go to Step 16.
NO : Replace the clock spring and install the driver's air bag module. Then go to Step 21.
STEP 16. 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. 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 : It can be assumed that this malfunction is intermittent Install the driver's air bag module.
NO : Return to Step 2.
STEP 17. Check cruise control switch connector C-203 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to Harness Connector Inspection. Connector Continuity and Voltage Test
Q: Is the connector and terminal in good condition?
YES : Go to Step 18.
NO : Repair or replace the damaged connector. Install the driver's air bag module. Then go to Step 21.
STEP 18. Check the cruise control switch.
1. Remove the cruise control switch.
2. Measure the resistance between terminal number 2 and terminal number 3 when each of the "ON/OFF", "COAST/SET", "ACC/RES" and "CANCEL" switch is pressed.
Q: Is the resistance within specifications?
YES : Install the cruise control switch, and install the driver's air bag module. Then go to Step 19.
NO : Replace the cruise control switch. Install the driver's air bag module. Then go to Step 21.
STEP 19. 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 20.
NO : Replace the ECM. When the ECM is replaced, register the encrypted code. Then go to Step 21.
STEP 20. 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.
Q: Is DTC 15 set?
YES : Replace the ECM. When the ECM is replaced, register the encrypted code. Then go to Step 21.
NO : It can be assumed that this malfunction is intermittent.
STEP 21. 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 22.
NO : Return to Step 2.
STEP 22. 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.
Q: Is DTC 15 set?
YES : Return to Step 1.
NO : The procedure is complete.