Pinpoint Test A: No Communication With The Abs Module

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

A1 CHECK THE VOLTAGE TO THE ABS MODULE

Key in OFF position.
Disconnect: ABS Module C135.
Key in ON position.
Measure the voltage between ABS module C135-4, circuit 20-CF6A (PK/YE), harness side and ground.

Fig 1: Measuring Voltage Between ABS Module C135-4, Circuit 20-Cf6A (PK/YE), Harness Side And Ground
Courtesy of FORD MOTOR CO.
Is the voltage greater than 10 volts?

Yes

GO to A2.

REPAIR circuit 20-CF6A (PK/YE). REPEAT the self-test.

A2 CHECK THE ABS MODULE GROUNDS

Key in OFF position.
Measure the resistance between ABS module C135-16, circuit 31-CF6A (BK/YE), harness side, and ground; and between ABS module C135-47 circuit 31-CF6B (BK/YE) harness side, and ground.

Fig 2: Measuring Resistance Between ABS Module C135-16, Circuit 31-Cf6A (BK/YE), Harness Side
Courtesy of FORD MOTOR CO.
Are the resistances less than 5 ohms?

Yes

CHECK the module communications network. REFER to MODULE COMMUNICATIONS NETWORK .

REPAIR circuit 31-CF6A (BK/YE) or 31-CF6B (BK/YE). REPEAT the self-test.