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Jerry
Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
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1999 Dodge Ram 1500 died. Getting a P1389 code.

Customer Question

1999 Dodge Ram 1500 died. Getting a P1389 code.
Submitted: 2 months ago.
Category: Dodge
Expert:  Gunvir Singh replied 2 months ago.

Hello, let me review your request. Please stand by.

Expert:  Gunvir Singh replied 2 months ago.

Does the engine turnover when you try to start?

Customer: replied 2 months ago.
Turns over, will not start.
Expert:  Gunvir Singh replied 2 months ago.

Do you have spark present at the spark plugs when you try to start?

Customer: replied 2 months ago.
I will have to check. I will get back with you.
Expert:  Gunvir Singh replied 2 months ago.

Ok. Also make sure to check all the fuses and ASD relay.

Customer: replied 2 months ago.
No spark. Removed spark plug wire, inserted a new plug, laid it against the exhaust for ground, no spark. Swaaped both tans and a/c clutch relay with ASD (same exact part numbers on all 3), no change.
Customer: replied 2 months ago.
Transmission relay*
Expert:  Gunvir Singh replied 2 months ago.

If there is no signal to the asd relay that could be a faulty pcm. Need to star by checking for loose/ damaged wiring at he pcm connector.

Customer: replied 2 months ago.
Ok, checked wiring at pcm, it all seems intact , no burned wires , nothing seemed loose.
Expert:  Gunvir Singh replied 2 months ago.

Need to check for signal present at asd relay output circuit frompcm. If wiring good and no signal . The problem is the PCM.

Customer: replied 2 months ago.
That is at position CAV 86 ?
Expert:  Gunvir Singh replied 2 months ago.

Yes.

Customer: replied 2 months ago.
0 volts at green/black wire at pcm , middle connector. However, one of the green/black wires at the fuse box under the hood is 12 volts. But there are 2 green /black at fuse box. What color is the asd wire at the fuse /power box ? And what is it supposed to read?
Expert:  Gunvir Singh replied 2 months ago.

The ASD cable is supposed to be green black. It is supposed to read battery voltage.

Customer: replied 2 months ago.
Ok, but do I need to check this green/black wire at the other end where it connects to to power box under the hood?
Expert:  Gunvir Singh replied 2 months ago.

Yes. If no signal present at ASD, need to check wiring continuity at from asd pin to PCM. If continuioty good, possibly a faulty PCM.

Expert:  Gunvir Singh replied 2 months ago.

Hello, just checking if any updates?