connection at G303. Refer to intermittent failures troubleshooting.?
7. Turn the ignition switch to LOCK (0).
8. Disconnect the brake pedal position switch 4P connector.
9. Do the brake pedal position switch test See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Braking
Sensor/Switch/Testing and Inspection.
Is the switch OK?
YES -
Check for fuel and emissions systems DTCs See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial
Inspection and Diagnostic Overview, and troubleshoot those DTCs first, if no fuel and emissions systems DTCs are found troubleshoot the brake
pedal position switch signal circuit See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and
General Diagnostics/Brake Pedal Position Switch Signal Circuit Troubleshooting.?
NO -
Replace the brake pedal position switch See: Brakes and Traction Control/Brake Pedal Assy/Adjustments.?
10. Update the VSA modulator-control unit if it does not have the latest software See: Brakes and Traction Control/Antilock Brakes / Traction
Control Systems/Traction Control Module/Testing and Inspection. If the unit already has the latest software, substitute a known-good VSA
modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control Module/Service and
Repair.
11. Test-drive the vehicle at 10 mph (15 km/h) for 60 seconds or more.
NOTE: Drive the vehicle on the road, not on a lift.
12. Check for DTCs with the HDS.
Is DTC 68 indicated?
YES -
Check for loose terminals in the VSA modulator-control unit 46P connector. Check for a loose connection at G303. If the VSA modulator-control
unit was updated, substitute a known-good VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control
Systems/Traction Control Module/Service and Repair, then retest. If the VSA modulator-control unit was substituted, go to step 1.
NO -
If the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the
original VSA modulator-control unit See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Traction Control
Module/Service and Repair. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.?
69
VSA DTC Troubleshooting: 69
DTC 69:
BRK DIAG Signal Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
4. After the TSA warning goes off, press the brake pedal for 3 seconds or more.
5. Check for DTCs with the HDS and the TSA warning.
Is DTC 69 indicated and the TSA warning?
