HD8 - Check Resistance of Injector(s) and Harness

*** THIS ARTICLE REFLECTS CHANGES MADE BY TSB # 9410B19, June 1994

- Key Off.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires etc. Service as necessary.

NOTE: This erases Continuous Memory DTCs.

- Install breakout box, leave PCM disconnected.

- Measure resistance between suspect injector test pin and Test Pin 71 or 97 at the breakout box.

Misfire Continuous Memory Diagnostic Trouble Codes (DTCs):

P0301-Cyl #1, Inj Test Pin 75

P0302-Cyl #2, Inj Test Pin 101

P0303-Cyl #3, Inj Test Pin 74

P0304-Cyl #4, Inj Test Pin 100

P0305-Cyl #5, Inj Test Pin 73

P0306-Cyl #6, Inj Test Pin 99

P0307-Cyl #7, Inj Test Pin 72

P0308-Cyl #8, Inj Test Pin 98

P0300-multiple cylinders misfiring, or cannot identify cylinder due to Crankshaft Position sensor failure.


- Is the resistance between 11.0-18.0 ohms?

YES -- Injector and harness resistance is OK, GO to HD9. HD9 - Check Injector Driver Signal

NO -- GO to Pinpoint Test Step H42 to evaluate fuel injectors. H42 - Check Fuel Pressure