Sensor Failure

1. Connect EEC-IV 60-Pin Breakout Box to the anti-lock brake control module with ABS Adapter Cable.
2. Disconnect the suspect anti-lock brake sensor.
3. Check the harness for short to ground.





1 Monitor the resistance between EEC-IV 60-Pin Breakout Box pins, and ground.

NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

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 the harness for an open circuit.
1 Connect a jumper between the two pins on the suspect anti-lock brake sensor connector.

NOTE: Connect jumper securely to the suspect anti-lock brake sensor connector.





2 Monitor the resistance between EEC-IV 60-Pin Breakout Box pins.

NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test

3 Drive over rough roads at various speeds.
4 If there is an open circuit detected between the pins, repair the circuit(s) for an open circuit.

5. Check the suspect anti-lock brake sensor connector.
1 Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the connector as follows:
Front Sensor: 4000 ohms
Rear Sensor: 1500 ohms

NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.

2 If the resistance is above specification replace the anti-lock brake sensor.
3 Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the connector as follows:
Front Sensor: 2000 ohms
Rear Sensor: 900 ohms

NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

4 If the resistance is below specification, replace the anti-lock brake sensor.
5 Monitor the resistance between an anti-lock brake sensor terminal and ground on the highest resistance scale of the meter, while wiggling the connector.

NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

6 If the meter shows anything but open circuit, replace the anti-lock brake sensor.