12 Checking System For Fault Codes

1. Connect diagnostic read-out tool to engine harness connector, then disconnect and reconnect battery quick disconnect.
2. Crank engine for seven seconds, then turn ignition switch to Run position for five seconds before turning Off.
3. Place system in Diagnostic Mode and record all codes.
4. If no Code 88 or 00 is displayed, proceed to Test 13.
5. If code sequence is 88-11-12-55, distributor pickup circuit fault is present. Proceed to Test 14.
6. If code sequence is 88-42-55, auto shutdown relay pull in coil circuit fault is present. Proceed to Test 15.
7. If code sequence is 88-12-54-55, distributor sync pickup circuit fault is present. Proceed to Test 16.
8. If code sequence is 88-11-12-22-23-24-55, sensor ground circuit fault is present. Locate and repair open circuit in wire from red logic module connector cavity 25.
9. If code sequence is 88-12-25-55 or 88-12-27-55, auto shutdown relay output circuit fault is present. Replace [1][2]power module.
10. If code sequence is 88-12-15, no fault codes are present. Locate and repair open in wire between [1][2]power module 10-way connector cavity 6 and fuel pump or injectors.