Table A Antilock Indicator on With No DTCS Set

Table A (Part 1 Of 2):

Table A (Part 2 Of 2):

ABS/TCS Circuit Schematic:

CIRCUIT DESCRIPTION
When the ignition is first turned to RUN, the Electronic Brake/Traction Control Module (EBCM/EBTCM) goes through a self-test lasting 2-4 seconds. During this test, the EBCM/EBTCM grounds terminal 52 causing the amber ANTILOCK indicator to light. This serves as an indicator bulb test.

When a low fluid condition exists, the EBCM/EBTCM turns ON the amber ANTILOCK and TRACTION OFF indicators but does not set a DTC. A low fluid level condition usually lights the red BRAKE warning lamp since the master cylinder supplies the Brake Pressure Modulator Valve (BPMV) reservoir. However, restrictions or air in the hose could cause a low fluid condition in the BPMV reservoir without lighting the red BRAKE warning lamp.

DIAGNOSTIC AIDS
Possible Causes:
- Open in CKT 441, 800, 1451, 849 or 853.
- Low brake fluid level or open BPMV fluid level switch circuit.
- Short to ground in CKT 441, 800 or 852.