Galant L4-2.0L SOHC (1989)
1. Disconnect the control relay connector and Turn on the ignition.
2. Using a voltmeter, measure the ignition power supply voltage of the control relay, between harness connector terminal 8 and ground.
Voltage: System Voltage.
3. Turn off the ignition. Using a voltmeter, measure the power supply voltage between the harness connector terminal 4 and ground.
Voltage: System Voltage.
4. Check for continuity of the ground circuit, between harness connector terminal 6 and ground.
Continuity: Should Exist.
5. Check for continuity (short) to ground, between the control relay harness connector terminal 3 and the ECU harness connector terminals 102 and
107.
Continuity: Should Not Exist.
6. Check for continuity between the control relay harness connector terminal 3 and the ECU harness connector terminals 102 and 107.
Continuity: Should Exist.
If any of the previous tests produce unsatisfactory results, the harness will need to be repaired or replaced. Once repairs have been completed, road
test the vehicle to confirm that the repair has corrected the problem.
If the same problem reoccurs, it is possible that there is an intermittent failure of the component or the ECU. Check for looseness at all harness
junctions and test for an intermittent failure.
