VSA DTC 69-1 (2014 2015)
DTC 69-1 : Brake Diag Circuit OFF Failure
NOTE: Before you troubleshoot, review the how to troubleshoot the VSA system - Refer to:
How to Troubleshoot the VSA System (2014 2015 2016)
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| 69-1 Brake Diag Circuit OFF Failure |
DTCs (VSA)
- Problem verification
- 1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
- 4. After the VSA indicator goes off, press the brake pedal for 3 seconds or more.
- 5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame 69-1 Brake Diag Circuit OFF Failure Is DTC 69-1 indicated?
YES
The failure is duplicated. Go to step 2.
NO
The failure is not duplicated. Go to step 5.
- Open wire check (STOP SW line)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
Brake pedal position switch 4P connector Brake light relay 5P connector - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake pedal position switch 4P connector: disconnected Brake light relay 5P connector: disconnected Test circuit STOP SW Test point 1 Brake pedal position switch 4P connector No. 1 (PUR) Test point 2 Brake light relay 5P connector No. 4 (PUR) Is there continuity?
YES
The STOP SW wire is OK. Go to step 3.
NO
Repair an open in the wire between the brake pedal position switch and the brake light relay.
- Open wire check (BRAKE DIAG line)
- 1. Disconnect the following connector.
VSA modulator-control unit 38P connector - 2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake pedal position switch 4P connector: disconnected Brake light relay 5P connector: disconnected VSA modulator-control unit 38P connector: disconnected Test circuit BRAKE DIAG Test point 1 Brake light relay 5P connector No. 1 (ORN) Test point 2 VSA modulator-control unit 38P connector No. 18 (ORN) Is there continuity?
YES
The BRAKE DIAG wire is OK. Go to step 4.
NO
Repair an open in the wire between the VSA modulator-control unit and the brake light relay.
- Brake light relay check (substitution)
- 1. Substitute a known-good brake light relay.
- 2. Reconnect the following connectors.
Brake pedal position switch 4P connector Brake light relay 5P connector VSA modulator-control unit 38P connector - 3. Turn the vehicle to the ON mode.
- 4. Clear the DTC with the HDS.
- 5. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
- 6. After the VSA indicator goes off, press the brake pedal for 3 seconds or more.
- 7. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame 69-1 Brake Diag Circuit OFF Failure Is DTC 69-1 indicated?
YES
Go to step 9.
NO
Replace the original brake light relay.
- Open wire check (BRAKE LAMP line) 1
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
VSA modulator-control unit 38P connector - 3. Connect terminals 1 and 2 with a jumper wire.
Terminal 1 VSA modulator-control unit 38P connector No. 14 (YEL) Terminal 2 Body ground - 4. Turn the vehicle to the ON mode.
- 5. Check the brake lights without pressing the brake pedal.
Are the brake lights on?
YES
Go to step 8.
NO
Go to step 6.
- Open wire check (BRAKE LAMP line) 2
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the jumper wire.
- 3. Disconnect the following connector.
Brake light relay 5P connector - 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake light relay 5P connector: disconnected VSA modulator-control unit 38P connector: disconnected Test circuit BRAKE LAMP Test point 1 Brake light relay 5P connector No. 5 (YEL) Test point 2 VSA modulator-control unit 38P connector No. 14 (YEL) Is there continuity?
YES
The BRAKE LAMP wire is OK. Go to step 7.
NO
Repair an open in the wire between the VSA modulator-control unit and the brake light relay.
- Open wire check (IG1 METER line)
- 1. Turn the vehicle to the ON mode.
- 2. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode Brake light relay 5P connector: disconnected VSA modulator-control unit 38P connector: disconnected Test circuit IG1 METER Test point 1 Brake light relay 5P connector No. 3 (PNK) Test point 2 Body ground Is there battery voltage?
YES
Replace the brake light relay.
NO
Repair an open in the wire between the brake light relay and the No. D11 (7. 5 A) fuse in the driver's under-dash fuse/relay box.
- Open wire check (BRAKE DIAG line)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Brake light relay 5P connector - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Brake light relay 5P connector: disconnected VSA modulator-control unit 38P connector: disconnected Test circuit BRAKE DIAG Test point 1 Brake light relay 5P connector No. 1 (ORN) Test point 2 VSA modulator-control unit 38P connector No. 18 (ORN) Is there continuity?
YES
The BRAKE DIAG wire is OK. Go to step 9.
NO
Repair an open in the wire between the VSA modulator-control unit and the brake light relay.
- VSA modulator-control unit check (update)
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Reconnect the following connectors.
Brake light relay 5P connector (if disconnected) VSA modulator-control unit 38P connector (if disconnected) - 3. Update the VSA modulator-control unit if it does not have the latest software.
- 4. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
- 5. After the VSA indicator goes off, press the brake pedal for 3 seconds or more.
- 6. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame Is DTC 69-1 indicated?
YES
Check for loose terminals in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .
NO
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.