25 Pin, 3 Channel ABS
Sensor Failure
1. Connect EEC-IV 60-Pin Breakout Box to the ABS module with the ABS Adapter Cable.
2. Disconnect the suspect wheel speed sensor.
3. Check the harness for short to ground.
1. NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
Monitor the resistance between EEC-IV 60-Pin Breakout Box pins and ground as follows:
2. Drive over rough roads at various speeds.
3. If there is continuity between either circuit and ground, repair the circuit for a short to ground.
4. Check harness for open circuit.
1. NOTE: Connect jumper securely to the suspect sensor connector.
Connect a jumper between the two pins on the suspect sensor connector.
2. NOTE: Use 88 Digital Multi meter with the maximum resistance hold feature enabled for this test.
Monitor the resistance between EEC-IV 60-Pin Breakout Box pins as follows:
3. Drive over rough roads at various speeds.
4. If there is an open circuit detected between pins, repair the circuit(s) for an open circuit.
5. Check suspect sensor electrical connector.
1. NOTE: Use 88 Digital Multi meter with the maximum resistance hold feature enabled for this test.
Monitor the resistance between suspect wheel speed sensor terminals while wiggling the electrical connector.
2. If the resistance is above specifications, install a new wheel speed sensor. Service and Repair
3. NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
Monitor the resistance between suspect wheel speed sensor terminals while wiggling the electrical connector:
4. If the resistance is below specifications, install a new wheel speed sensor.
5. NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.
Monitor the resistance between an wheel speed sensor terminal and ground on the highest resistance scale of the meter while wiggling the electrical connector.
6. If the meter shows anything other than open circuit, install a new wheel speed sensor. Service and Repair