Pinpoint Test G: The Yellow Abs Warning Indicator Is Never/Always On

Test Step

G1 CHECK THE YELLOW ABS WARNING INDICATOR OPERATION

Result / Action to Take

Yes

Go to G2.

Go to G4.

Test Step

G2 CHECK THE YELLOW ABS WARNING INDICATOR

Key in OFF position.
Connect a fused (5A) jumper wire between the traction control module C135 pin 44, circuit 31S-CF28 (BK/RD), harness side and ground.

Fig 1: Checking Yellow ABS Warning Indicator
Courtesy of FORD MOTOR CO.
Key in ON position.
Is the yellow ABS warning indicator illuminated?

Result / Action to Take

Yes

Go to G3.

INSTALL a new HCU. REFER to ANTI-LOCK CONTROL . REPEAT the self-test. TEST the system for normal operation.

Test Step

G3 CHECK CIRCUIT 31S-CF28 (BK/RD) FOR AN OPEN

Key in OFF position.
Disconnect: Instrument Cluster C220a.
Measure the resistance between the traction control module C135 pin 44, circuit 31S-CF28 (BK/RD), harness side and the instrument cluster C220a pin 6, circuit 31S -CF28 (BK/RD), harness side.

Fig 2: Checking Circuit 31S-CF28 (BK/RD) For Open
Courtesy of FORD MOTOR CO.
Is the resistance less than 5 ohms?

Result / Action to Take

Yes

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

Test Step

G4 CHECK CIRCUIT 31S-CF38 (BK/RD) FOR A SHORT TO GROUND

Key in OFF position.
Disconnect: Instrument Cluster C220a.
Measure the resistance between the traction control module C135 pin 44, circuit 31S-CF28 (BK/RD) harness side and ground.

Fig 3: Checking Check Circuit 31S-CF38 (BK/RD) For Short To Ground
Courtesy of FORD MOTOR CO.
Is the resistance greater than 10,000 ohms?

Result / Action to Take

Yes

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.