C0047-62

C0047-62-BRAKE PRESSURE SENSOR - SIGNAL COMPARE FAILURE

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on and no system under voltage condition present.

- Set Condition:
The Anti-lock Brake System (ABS) Module is unable to activate the correct solenoid valve.





1. VERIFY THE DTC IS ACTIVE

NOTE: This DTC must be active for the results of this test to be valid.

1. Turn the ignition on.
2. With the scan tool, read and record DTCs.
3. With the scan tool, read and record Freeze Fame information.
4. With the scan tool, erase DTCs.
5. Start the engine.
6. Press the brake pedal firmly and release.
7. With the scan tool, read and record DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Perform ABS-INTERMITTENT CONDITION TEST ABS Intermittent Condition Test.

2. CHECK BRAKE PRESSURE SENSOR
1. Start the engine.
2. With the scan tool look at Brake Pressure Sensor Signal and the Brake Switch Signal.
3. With the brakes not applied the Pressure Sensor should read ±15 bar (218 psi).
4. Apply the brakes the Pressure Sensor should read above 15 bar (218 psi).

Did Brake Pressure Sensor increase above 15 bar (218 psi)?

Yes

- NOTE: For this failure it is necessary to replace both the ABS Module and the HCU as a complete unit.
- Replace the Anti-lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Replace the Hydraulic Control Unit (HCU). Hydraulic Control unit (HCU) - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 3

3. CHECK FOR AIR IN BRAKE SYSTEM

NOTE: Before continuing the brake system must be bled to verify there is no air in the brake system.

1. Turn ignition off.
2. Bleed brake system.

Was there any air in the brake system?

Yes

- Repair as needed.
- Perform ABS VERIFICATION TEST ABS Verification Test.

No

- NOTE: For this failure it is necessary to replace both the ABS Module and the HCU as a complete unit.
- Replace the Anti-lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Replace the Hydraulic Control Unit (HCU). Hydraulic Control unit (HCU) - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.