Component Tests and General Diagnostics
Component Test - Intermittent FailuresSensor
1. Connect EEC-IV 60-Pin Breakout Box to the EHCU 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 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 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 open circuit detected between pins, repair the circuit(s) for an open circuit.
5. Check suspect sensor electrical connector.
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 electrical connector:
2 If the resistance is above specifications, install a new 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 electrical connector.
4 If the resistance is below specifications, install a new anti-lock brake sensor.
5 NOTE: Use 88 Digital Multimeter with the 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 electrical connector
6 If the meter shows anything but open circuit, install a new anti-lock brake sensor.