DTC 34
DTC 34: Master Cylinder Brake Fluid Pressure Sensor Circuit Open/ShortDTC 35: Master Cylinder Brake Fluid Pressure Sensor Center Position Error
DTC 36: Master Cylinder Brake Fluid Pressure Sensor Shift Error
1. Turn the ignition switch ON (II).
2. Clear the DTCs with the HDS.
3. Watch the adaptive cruise control (ACC) indicator.
Does the adaptive cruise control (ACC) indicator stay off?
YES - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
NO - Go to step 4.
4. Press the brake pedal.
5. Watch the adaptive cruise control (ACC) indicator.
Does the adaptive cruise control (ACC) indicator stay off?
YES - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
NO - Go to step 6.
6. Check for DTCs with the HDS.
Is DTC 34, 35, or 36 indicated?
YES - Go to step 7.
NO - Troubleshoot the indicated DTC.
7. With the brake pedal released, check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.
Is there about 0.5 V?
YES - Go to step 8.
NO - Check the VSA system.
8. Do the brake booster test.
9. Press the brake pedal with about 314 N (32 kgf, 70.6 lbf) pressure.
10. Check the master cylinder brake fluid pressure voltage (BRAKE P) with the HDS.
Is there about 2.5 V?
YES - Go to step 11.
NO - Check the VSA system.
11. Check the brake switch signal (BRAKE SW (N.O.)) with the HDS.
Does the indication show ON when the brake pedal is pressed, and show OFF when the brake pedal is released?
YES - Check for loose or poor connections. If OK, replace the adaptive cruise control (ACC) unit.
NO - Go to step 12.
12. Check for DTCs with the HDS.
Is DTC 60, 110 or 111 indicated?
YES - Troubleshoot the indicated DTC(s).
NO - Troubleshoot the brake pedal position switch circuit.