Test A: DTC C1300 - ABS Hydraulic Pump Motor Circuit Failure

Pinpoint Test A: DTC C1300 - ABS Hydraulic Pump Motor Circuit Failure
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
Fused battery voltage is provided to the ABS module from battery junction box (BJB) fuses 109 (20A) and 106 (40A) along circuits 483 (RD) and 601 (LB/PK) respectively. Fused ignition voltage is provided from central junction box (CJB) fuse 13 (10A) along circuit 1003 (GY/YE). When necessary, the ABS module supplies voltage to the hydraulic control unit (HCU) assembly and the pump motor is activated. The ABS module is provided a ground along circuit 57 (BK) and the hydraulic pump motor is provided a ground internally through the HCU.
^ DTC C1300 ABS Hydraulic Pump Motor Circuit Failure - When the ignition key is in the RUN position, if the ABS module detects an open circuit, a short to voltage, a short to ground or a seized pump motor, DTC C1300 will be set.

This pinpoint test is intended to diagnose the following:
^ Fuse(s)
^ Wiring, terminals or connectors
^ ABS module
^ HCU assembly

A1-A4:

A4 (Continued)-A6: