DTC 15
DTC 15: Cruise Control Switch SystemCruise Control Switch System Circuit (Part 1):
Cruise Control Switch System 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 given.
- 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 "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF".
- Item 91: Resume switch.
- When "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF".
- Item 92: Set switch.
- When "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "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-201 by backprobing.
1. With the harness connector, remove the cruise control switch.
2. Connect the negative (-) battery cable.
3. Do not disconnect cruise control switch connector C-201.
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-201 terminal number 3 and ground by backprobing.
7. Turn the ignition switch to the "LOCK" (OFF) position.
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-10.
1. Remove the ECM.
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-10 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. Install the ECM.
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-10 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to General (Electrical), Harness Connector Inspection.
Q: Is the connector and terminals in good condition?
YES : Go to Step 5.
NO: Repair or replace the faulty connector. Install the cruise control switch. Then go to Step 21.
STEP 5. Check the harness for short circuit to ground between the ECM connector B-10 terminal number 107 and the cruise control switch connector C-201 terminal number 3.
1. Disconnect ECM connector B-10 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-10 terminal number 107 and ground.
4. Reconnect ECM connector B-10.
Q: Is the measured continuity open circuit?
YES : Install the cruise control switch.Then go to Step 19.
NO : Go to Step 6.
STEP 6. Check intermediate connector C-130, cruise control switch connector C-201 and clock spring connectors C-202 and C-205 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to General (Electrical), Harness Connector Inspection.
Q: Is the connectors and terminals in good condition?
YES : Go to Step 7.
NO : Repair or replace the faulty connector. Install the cruise control switch. Then go to Step 21.
STEP 7. Check the harness wire between ECM connector B-10 terminal number 107 and cruise control switch connector C-201 terminal number 3 for damage.
Q: Is the harness wires in good condition?
YES : Go to Step 8.
NO : Repair the damaged harness wire. Install the cruise control switch. Then go to Step 21.
STEP 8. Check the clock spring. Refer to SRS, Driver's Air Bag Module Inspection.
Q: Is the clock spring in good condition?
YES : Go to Step 9.
NO : Replace the clock spring (Refer to SRS, Driver's Air Bag Module and Clock Spring). Install the cruise control switch. Then go to Step 21.
STEP 9. 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 "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF".
- Item 91: Resume switch.
- When "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF".
- Item 92: Set switch.
- When "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "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 (Refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points-How to Cope with Intermittent Malfunction General (Body and Chassis). Install the cruise control switch.
NO : Return to Step 2.
STEP 10. Measure the ground voltage at cruise control switch connector C-201 by backprobing.
1. Do not disconnect cruise control switch connector C-201.
2. Turn the ignition switch to the "ON" position.
3. Press the "ON/OFF" switch.
4. Measure the ground voltage between cruise control switch connector C-201 terminal number 2 and ground by backprobing.
5. Release the "ON/OFF" switch.
6. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.52 volt or less?
YES : Go to Step 17.
NO : Go to Step 11.
STEP 11. Measure the ground voltage at ECM connector B-10.
1. Remove the ECM [Refer to MFI, Engine Control Module (ECM)].
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 the "ON/OFF" switch.
5. Measure the ground voltage between special tool 48-pin connector terminal number 95 (ECM connector B-10 terminal number 95) and ground.
6. Release the "ON/OFF" switch.
7. Turn the ignition switch to the "LOCK" (OFF) position.
8. Disconnect special tool MB992110 between the ECM and the body-side harness connector.
9. Install the ECM [Refer to MFI, Engine Control Module (ECM)].
Q: Is the measured voltage 0.52 volt or less?
YES : Go to Step 13.
NO : Go to Step 12.
STEP 12. Check ECM connector B-10 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to General (Electrical), Harness Connector Inspection.
Q: Is the connector and terminals in good condition?
YES : Install the cruise control switch. Then go to Step 19.
NO : Repair or replace the faulty connector. Install the cruise control switch. Then go to Step 21.
STEP 13. Check ECM connector B-10, intermediate connector C-130, cruise control switch connector C-201 and clock spring connectors C-202 and C-205 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to General (Electrical), Harness Connector Inspection.
Q: Is the connectors and terminals in good condition?
YES : Go to Step 14.
NO : Repair or replace the faulty connector. Install the cruise control switch. Then go to Step 21.
STEP 14. Check the harness wire between ECM connector B-10 terminal number 95 and cruise control switch connector C-201 terminal number 2 for damage.
Q: Is the harness wires in good condition?
YES : Go to Step 15.
NO : Repair the damaged harness wire. Install the cruise control switch. Then go to Step 21.
STEP 15. Check the clock spring.
Refer to SRS, Driver's Air Bag Module Inspection.
Q: Is the clock spring in good condition?
YES : Go to Step 16.
NO : Replace the clock spring (Refer to SRS, Driver's Air Bag Module and Clock Spring). Install the cruise control switch. Then go to Step 21.
STEP 16. 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 "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF".
- Item 91: Resume switch.
- When "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF".
- Item 92: Set switch.
- When "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "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 (Refer to General (Body and Chassis), How to Use Troubleshooting/Inspection Service Points-How to Cope with Intermittent Malfunction). Install the cruise control switch.
NO : Return to Step 2.
STEP 17. Check cruise control switch connector C-201 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Refer to General (Electrical), Harness Connector Inspection.
Q: Is the connector and terminals in good condition?
YES : Go to Step 18.
NO : Repair or replace the faulty connector. Install the cruise control switch. Then go to Step 21.
STEP 18. Check the cruise control switch.
1. Remove the cruise control switch.
2. Check the cruise control switch.
Q: Is the resistance within specifications?
YES : Install the cruise control switch. Then go to Step 19.
NO : Replace the cruise control switch. 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 "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF".
- Item 91: Resume switch.
- When "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF".
- Item 92: Set switch.
- When "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "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 [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 Wireless Control Module). Then go to Step 21.
STEP 20. Read the DTC.
1. Disconnect the negative (-) battery terminal, to erase the DTC of the cruise control system.
2. Connect the negative (-) battery cable.
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 diagnostic trouble code of the cruise control system.
Q: Is DTC 15 set?
YES : 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 21.
NO : 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).
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 "ON/OFF" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ON/OFF" switch is pressed again, the display on scan tool MB991958 should be "OFF".
- Item 91: Resume switch.
- When "ACC/RES" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "ACC/RES" switch is released, the display on scan tool MB991958 should be "OFF".
- Item 92: Set switch.
- When "COAST/SET" switch is pressed, the display on scan tool MB991958 should be "ON".
- When "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 DTC.
1. Disconnect the negative (-) battery terminal, to erase the DTC of the cruise control system.
2. Connect the negative (-) battery cable.
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 diagnostic trouble code of the cruise control system.
Q: Is DTC 15 set?
YES : Return to Step 1.
NO : The procedure is complete.