Sensor Failure

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 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 the harness for an open circuit.

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

Connect a jumper between the two pins on the suspect anti-lock brake sensor connector.

2 Note: Use 88 Digital Multimeter 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 the pins, repair the circuit(s) for an open circuit.
5. Check the suspect anti-lock brake sensor pigtail.

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

Monitor the resistance between suspect anti-lock brake sensor terminals while wiggling the connector as follows:





2 If the resistance is above specification, replace the anti-lock brake sensor.

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

Monitor the resistance between suspect anti-lock brake sensor pins (component side) while wiggling the connector as follows:





4 If the resistance is below specification, install a new anti-lock brake sensor.

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

Monitor the resistance between an anti-lock brake sensor pin (component side) and ground on the highest resistance scale of the meter while wiggling the connector.

6 If the meter shows anything but an open circuit, install a new anti-lock brake sensor.