18
Troubleshooting Diagnostic Trouble Codes:
Wheel Speed Sensors
2 Left Steer Axle Sensor
3 Right Steer Axle Sensor
4 Left Drive Axle Sensor
5 Right Drive Axle Sensor
14 Left Additional Axle Sensor
15 Right Additional Axle Sensor
1st. Blink
Code
Location
2nd. Diagnostic
Blink Trouble Code
Code Description
1 Excessive
Air Gap
2 Output Low
at Drive-off
3 Open or
Shorted
4 Loss of
Sensor Signal
5 Wheel End
6 Erratic Sensor
Signal
7 Tire Size
Calibration
8 Configuration
Error
Adjust sensor to contact exciter ring. Rotate wheel and verify a minimum of 0.25
VAC sensor output at ~ 0.5 RPS. Verify condition of sensor head. Verify mounting
of exciter ring and condition of teeth. Verify proper bearing endplay. Verify condition
and retention of clamping sleeve. Verify sensor lead routing and clamping.
Adjust sensor to contact exciter ring. Rotate wheel and verify a minimum of 0.25
VAC sensor output at ~ 0.5 RPS. Verify condition of sensor head. Verify mounting
of exciter ring and condition of teeth. Verify proper bearing end-play. Verify
condition and retention of clamping sleeve. Verify sensor lead routing and
clamping.
Verify 1500 – 2500 ohms across sensor leads. Verify no continuity between
sensor leads and ground or voltage. Verify no continuity between sensor leads
and other sensors. Check for corroded/damaged wiring or connectors between
the ECU and the wheel speed sensor.
Adjust sensor to contact exciter ring. Rotate wheel and verify a minimum of 0.25
VAC sensor output at ~ 0.5 RPS. Verify condition of sensor head. Verify mounting
of exciter ring and condition of teeth. Verify proper bearing end-play. Verify
condition and retention of clamping sleeve. Verify sensor lead routing and
clamping. Check for corroded/damaged wiring or connectors between the
ECU and the wheel speed sensor.
Verify mounting of exciter ring and condition of teeth. Verify proper bearing end-
play. Verify condition and retention of clamping sleeve. Verify sensor lead
routing and clamping. Check mechanical function of brake. Check for kinked or
restricted air lines.
Adjust sensor to contact exciter ring. Rotate wheel and verify a minimum of 0.25
VAC sensor output at ~ 0.5 RPS. Verify condition of sensor head. Verify mounting
of exciter ring and condition of teeth. Verify proper bearing end-play. Verify
condition and retention of clamping sleeve. Verify sensor lead routing and
clamping. Check for corroded/damaged wiring or connectors between the
ECU and the wheel speed sensor.
Verify correct tire size as desired. Verify proper tire inflation. Verify correct number
of exciter ring teeth.
ECU is configured for four sensors, but has detected the presence of additional
sensors. Verify sensor wiring and ECU configuration.
Repair Information
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