D50/Power Ram 50 L4-2350cc 2.4L SOHC (1992)
HARNESS TEST:
1. Disconnect the air flow sensor connector and turn the key to the ON position.
2. Using a voltmeter, measure the terminal voltage between the harness connector terminal 3 and ground.
Voltage:
4.8 - 5.2 Volts.
3. Using a voltmeter, measure the power supply voltage between the harness connector terminal 3 and ground.
Voltage:
System voltage.
4. Check for continuity of the ground circuit of the air flow sensor, between the harness connector terminal 5 and ground.
Continuity:
Should exist
5. Check for continuity between ECM harness connector terminal 57 and ground.
Continuity:
Should not exist
6. Check for continuity between the air flow sensor harness connector terminal 7 and ground.
Continuity:
Should not exist
7. Check for continuity between ECM harness connector terminal 57 and air flow sensor harness connector terminal 7.
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.
