Pinpoint Test C: DTC B1484 - Brake Pedal Input Open Circuit

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.

C1 CHECK THE STOPLAMPS

Apply the brake pedal.
Do the stoplamps illuminate?

Yes

GO to C2.

REFER to EXTERIOR LIGHTING .

C2 CHECK THE ABS MODULE BOO_ABS PID

Connect the diagnostic tool.
Key in ON position.
Monitor the ABS module PID BOO_ABS, while applying and releasing the brake pedal.
Does the ABS module PID BOO_ABS indicate ON with the brake pedal pressed and OFF with the brake pedal released?

Yes

CLEAR the DTCs. REPEAT the self-test. If the DTC B1484 is retrieved, GO to C4.

GO to C3.

C3 CHECK CIRCUIT 810 (RD/LG) FOR OPEN

NOTE: Make sure the brake pedal is released for this step.

Disconnect: ABS Module C135.
Press and hold the brake pedal.
Measure the voltage between the ABS module C135 pin 6, circuit 810 (RD/LG), harness side and the ABS module C135 pin 12, circuit 57 (BK) harness side.
Is voltage greater than 10 volts?

Yes

GO to C4.

REPAIR circuit 810 (RD/LG) or circuit 57 (BK). CLEAR the DTCs. TEST the system for normal operation.

C4 CHECK FOR CORRECT ABS MODULE OPERATION

Disconnect all ABS module connectors.
Check for the following:
- Corrosion
- Puzzle out pins
Connect all the ABS module connectors and make sure they are seated correctly.
Operate the system and determine if the concern is still present.
Is the concern still present?

Yes

INSTALL a new ABS module. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . CLEAR the DTCs.

The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.