CUSTOMER CONCERN Customer states the ABS warning light is on. DTCs C1321, C1475 and U2023 are stored. CAUSE No external brake-fluid leaks were found, confirming an internal failure of the ABS hydraulic unit/control module assembly. CORRECTION Remove and replace ABS hydraulic control unit/control module assembly. Program module, perform hybrid ABS bleed procedure and clear DTCs.

CUSTOMER CONCERN Customer states the ABS warning light is on and brake-pedal operation feels abnormal. The ABS module stores C1524, C1526 and U2023. CAUSE Circuit testing at the brake-pedal position sensor found the sensor signal did not agree with the 5-volt reference circuits on the Blue/Brown and Brown/White wires, confirming a failed BPP sensor. CORRECTION Remove and replace brake-pedal position sensor. Perform sensor calibration and clear ABS DTCs.