Pinpoint Test Ac: DTC C1029:00, C102B:00
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
- AC1 BLEED THE BRAKES
- Bleed the brakes. Refer to
BRAKE SYSTEM - GENERAL INFORMATION
article.
- Clear the DTCs.
- Road test the vehicle.
- Is the concern still present?
- Yes : GO to AC2
- No : The system is operating correctly at this time. The concern may have been caused by air in the brake system.
- Bleed the brakes. Refer to
BRAKE SYSTEM - GENERAL INFORMATION
article.
- AC2 MONITOR THE ABS PRIMARY AND SECONDARY CHANNEL PRESSURES
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: ABS Module DataLogger.
- Select the following PIDs to monitor the primary and secondary channels.
- Left front brake pressure (LF_BRK_PRS)
- Right rear brake pressure (RR_BRK_PRS)
- Right front brake pressure (RF_BRK_PRS)
- Left rear brake pressure (LR_BRK_PRS)
- Depress the brake pedal firmly and note the brake pressures displayed by each PID.
- Add the pressures for the left front brake pressure and the right rear brake pressure together (secondary channel).
- Add the pressures for the right front brake pressure and the left rear brake pressure together (primary channel).
- Are the primary and secondary channel pressures within 10% of each other?
- Yes : CLEAR the DTCs, REPEAT the self-test. If C1029:00 or C102B:00 returns, INSTALL a new HCU. REFER to HYDRAULIC CONTROL UNIT (HCU) in this service information.
- No : CLEAR the DTCs, REPEAT the self-test. If C1029:00 or C102B:00 returns, INSTALL a new brake master cylinder. REFER to HYDRAULIC BRAKE SYSTEM ACTUATION article.