- No communication with the anti-lock brake system (ABS) module
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- Fuse
- Circuitry
- ABS module
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- ABS false activation, ABS too sensitive, ABS activates on normal stop
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- Front anti-lock brake sensor tone rings
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- INSPECT both front wheel speed sensor tone rings for damaged teeth. CHECK the wheel speed sensor gap.
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- Chafed wire insulation or pinched wire
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- INSPECT the wiring harness from the front wheel speed sensor knuckle to the frame and from the rear axle to the frame.
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- Rear wheel speed sensor, excessive variance in air gap between wheel speed sensor and sensor ring
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- INSPECT both rear wheel speed sensor rings for damaged teeth. CHECK the wheel speed sensor air gap (0.16-1.65 mm). CHECK the sensor ring run out (0.28 mm max.). If the air gap or run out are not within specification, INSTALL a new hub assembly. Refer to
WHEEL HUBS AND BEARINGS - FULL FLOATING AXLE - DANA
.
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- Open or shorted wheel speed sensor circuit
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- Rear wheel speed sensor tone ring
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- INSPECT the rear ABS wheel speed sensor tone ring.
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- Rear brake adjustment
- Linings
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- The red brake warning indicator does not self-check
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- Instrument cluster
- Brake fluid level
- Circuitry
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- The red brake warning indicator stays on when the ignition is in RUN
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- Circuitry
- Brake fluid level
- Instrument cluster
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- RETRIEVE all DTCs and GO TO the DTC indexes. If no DTCs are present, REFER to
INSTRUMENT CLUSTER
.
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- The yellow anti-lock brake system (ABS) warning indicator does not self-check
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- Instrument cluster
- Brake fluid level
- Circuitry
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- The stability/traction control switch indicator is inoperative
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- Instrument cluster
- Circuitry
- Traction control switch
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- The traction control/roll stability control indicator (sliding car icon) is flashing
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- ABS module not configured or system not initialized
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