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The test procedure for the RR wheel speed sensor is simple and terrifying for Moxie.
1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor. It may take up
to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the low reference circuit terminal 2 (white) and ground.
If 5 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K17 electronic brake control module.
2. Test for less than 2 ohms in the low reference circuit (white) end to end.
If 2 ohms or greater, repair the open/high resistance in the circuit.
If less than 2 ohms, replace the K17 electronic brake control module.
If less than 5 ohms
3. Ignition ON.
4. Test for greater than 11 V between the signal circuit terminal 1 (#43 brn from EBCM blk from sensor) and ground.
If less than 11 V
1. Ignition OFF, disconnect the harness connector at the K17 electronic brake control module.
2. Test for infinite resistance between the signal circuit and ground.
If less than infinite resistance, repair the short to ground on the circuit.
If infinite resistance.
3. Test for less than 2 ohms in the signal circuit end to end.
If 2 ohms or greater, repair the open/high resistance in the circuit.
If less than 2 ohms, replace the K17 electronic brake control module.
If 11 V or greater
5. Install a 3 A fused jumper wire at the signal circuit terminal 1, ignition ON.
6. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly tapping the fused jumper wire
to the low reference circuit terminal 2.
If the parameter does not change
1. Ignition OFF, disconnect the harness connector at the K17 electronic brake control module, ignition
ON.
2. Test for less than 1 V between the signal circuit and ground.
If 1 V or greater, repair the short to voltage on the circuit.
If less than 1 V
3. Replace the K17 electronic brake control module.
If the parameter changes
7. Test or replace the B5 wheel speed sensor.
Simple, because straight-forward.
Terrifying because the EBCM is upwards from $800 for a used unit on ebay.
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