YES -
Troubleshoot the indicated DTC(s).?
NO -
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.?
17. Press the MAIN switch ON.
18. Clear the DTCs with the HDS.
19. Select ADAPTIVE CRUISE CONTROL (ACC) from the DRIVING SUPPORT menu, then enter the FUNCTION TEST.
20. Activate the BRAKE ACTUATOR 3 from the FUNCTION TEST.
21. Check for DTCs with the HDS.
Is DTC 43 indicated?
YES -
Check the brake fluid pressure sensor for proper installation or leaks See: Brakes and Traction Control/Hydraulic System/Brake Fluid Pressure
Sensor/Switch/Service and Repair. If OK, go to step 22.
NO -
Troubleshoot the indicated DTC(s). If there is no DTCs, the system is OK at this time.?
22. Without the brake pedal pressed, check the left front brake fluid pressure voltage (LF BRAKE P) with the HDS.
Is there about 0.5 V?
YES -
Go to step 23.
NO -
Go to step 26.
23. Test the brake booster See: Brakes and Traction Control/Power Brake Assist/Vacuum Brake Booster/Testing and Inspection.
24. Start the engine, then press the brake pedal with about 314 N (32 kgf, 70.6 lbf) pressure.
25. Check the left front brake fluid pressure voltage (LF BRAKE P) with the HDS.
Is there about 2.5 V?
YES -
The left front brake fluid pressure signal is OK, check for loose or poor connections. If OK, update the ACC unit See: Cruise Control/Testing and
Inspection/Programming and Relearning, then recheck. If the ACC unit was already updated, replace the ACC unit See: Cruise Control/Cruise
Control Module/Service and Repair.?
NO -
Go to step 26.
26. Check for DTCs with the HDS.
Is DTC 43 indicated?
YES -
Check for loose or poor connections. If OK, update the ACC unit See: Cruise Control/Testing and Inspection/Programming and Relearning, then
recheck. If the ACC unit was already updated, replace the ACC unit See: Cruise Control/Cruise Control Module/Service and Repair.?
NO -
Troubleshoot the indicated DTC(s). If there are no DTCs, the system is OK at this time.?
