C1614

DTC C1614: Parking Brake Switch System (ON Sticking)

Parking brake switch system circuit





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.
^ Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION
AWC-ECU receives the parking brake switch signal from the combination meter via ETACS-ECU.

DTC SET CONDITIONS
If the parking brake switch is on sticking, the code is set.

PROBABLE CAUSES
^ Parking brake switch malfunction
^ Damaged harness wires and connectors
^ Malfunction of the ETACS-ECU
^ Malfunction of the combination meter
^ Malfunction of AWC-ECU
^ Driving with the parking brake pulled

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the CAN bus lines. After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.

Q: Is DTC No. C1614 set?
YES: Go to Step 3.
NO: This diagnosis is complete.

STEP 3. Scan tool data list
Item 40: Parking brake switch.

Q: Is the check result normal?
YES: Go to Step 9.
NO: Go to Step 4.

STEP 4. Scan tool diagnostic trouble code
^ Check whether the combination meter-related DTC is set.
^ Check the ETACS diagnostic trouble code.

Q: Is the DTC set?
YES: Perform the relevant troubleshooting.
NO: Go to Step 5.

STEP 5. Check the parking brake switch.
Check the parking brake switch.

Q: Is the check result normal?
YES: Go to Step 6.
NO: Replace the parking brake switch. Then go to Step 9.

STEP 6. Combination meter connector, intermediate connector, and parking brake switch connector check: C-04, C-21, C-117
Check the contact status of the terminals.

Q: Is the check result normal?
YES: Go to Step 7.
NO: Repair the defective connector. Then go to Step 9.

STEP 7. Check the wiring harness between C-04 combination meter connector terminal No.4 and C-117 parking brake switch connector terminal No.1.
Check the output line for short circuit.

Q: Is the check result normal?
YES: Replace the combination meter. Then go to Step 8.
NO: Repair the wiring harness. Then go to Step 8.

STEP 8. Check whether the DTC is reset.

Q: Is DTC No. C1614 set?
YES: Replace the AWC-ECU. Then go to Step 9.
NO: Intermittent malfunction. (Refer to How to Cope with Intermittent Malfunction).

STEP 9. Check whether the DTC is reset.

Q: Is DTC No. C1614 set?
YES: Return to Step 1.
NO: This diagnosis is complete.