Summit Wagon AWD L4-1795cc 1.8L SOHC (1994)
Oxygen Sensor
1. Disconnect the oxygen sensor and the ECM connectors.
2. Using an Ohmmeter, check for continuity between the ECM harness connector terminal 55 and the oxygen sensor harness connector terminal A1.
Continuity: Should exist.
3. Using an Ohmmeter, check for continuity (short) to ground between the ECM harness connector terminal 55 and the oxygen sensor harness
connector terminal A1.
Continuity: Should not exist.
4. Using an Ohmmeter, check for continuity between the ECM harness connector terminal 72 and the oxygen sensor harness connector terminal A2.
Continuity: Should exist.
5. Using an Ohmmeter, check for continuity between the oxygen sensor harness connector terminal A4 and ground.
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,
clear the trouble codes and road test the vehicle to confirm that the repair has corrected the problem and the code doesn't return.
If the same trouble code reoccurs, it is possible that there is an intermittent failure of the component or the ECM. Check for looseness at all
harness junctions and test for an intermittent failure.
SCAN TOOL TESTING
