TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Right Front Wheel Speed Sensor connector.
Note: Check connector - Clean/repair as necessary.
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Turn the ignition on.
Check the Right Front Wheel Speed Sensor 12 volt Supply and Signal circuits for a
short to battery, ground, to each other and for open.
For the purposes of this test, a short to ground must be below 15k ohms.
Was any circuit short or open found?
All
Yes
→
Repair Right Front Wheel Speed Sensor circuit short or open.
Perform ABS VERIFICATION TEST - VER 1.
No
→
4
Turn ignition off.
Make sure the CAB is not disconnected.
Disconnect the Left Front Wheel Speed Sensor connector.
Turn ignition on.
Measure the voltage across the Right Front Wheel Speed Sensor 12 Volt Supply and
Signal circuits at the Right Front Wheel Speed Sensor connector.
Is the voltage above 10 volts?
All
Yes
→
No
→
Replace the Controller Antilock Brake in accordance with the
Service Information.
Perform ABS VERIFICATION TEST - VER 1.
5
Turn ignition off.
Disconnect the CAB harness connector.
Remove the harness strain relief to access the wires in the CAB connector.
Using a DC voltmeter and special tool 6801, backprobe the Wheel Speed Sensor 12
volt Supply and Signal circuits at the CAB.
Reconnect the CAB.
Turn ignition on.
Slowly rotate the right front wheel while observing voltmeter reading.
Does the voltage change from approximately 1.6 volts to 0.8 volts as the wheel is
rotated?
All
Yes
→
Replace the CAB.
Perform ABS VERIFICATION TEST - VER 1.
No
→
Replace the Right Front Wheel Speed Sensor.
Perform ABS VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
All
Yes
→
Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
→
Test Complete.
48
BRAKES (CAB)
RIGHT FRONT SENSOR CIRCUIT FAILURE —
Continued
