error codes on my scanner? what do they meen?

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03-20-2014, 07:42 PM

dr.zoidberg

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Year: 1997

Model: Cherokee

Engine: 4.0 straight 6

error codes on my scanner? what do they meen?

Had problems with my 97 xj starting. No power to fuel pump. If I bypass the fuel pump relay I get power. I replaced the crank position sensor today and still nothing but.....my obd2 scanner is reading error codes. P1282...fuel pump relay control circuit. P1388...asd relay control circuit. And p1389...no asd relay output voltage at pcm. Does that meen I have bad wires in thoes circuits or does it meen my pcm is fried? Can someone please explain?

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03-20-2014, 07:51 PM

Sideways99

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Year: 1999

Model: Cherokee

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Why'd you change the cps? I'd be looking into a fuel pump relay.

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03-20-2014, 07:55 PM

dr.zoidberg

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Year: 1997

Model: Cherokee

Engine: 4.0 straight 6

Quote:

Originally Posted by Sideways99

Why'd you change the cps? I'd be looking into a fuel pump relay.

Ive already replaced the fuel pump and asd relays. Their brand new.

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03-20-2014, 08:20 PM

Roler

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Year: 1997 (RHD)

Model: Cherokee (XJ)

Engine: 4.0 ltr

Did you replace them after those codes appeared? And if so, did you clear the codes and read again? Just checking.

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03-20-2014, 08:29 PM

dr.zoidberg

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Year: 1997

Model: Cherokee

Engine: 4.0 straight 6

Quote:

Originally Posted by Roler

Did you replace them after those codes appeared? And if so, did you clear the codes and read again? Just checking.

I ran the codes.....then replaced the relays and ran the codes again. I didnt clear them yet.

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03-20-2014, 11:36 PM

dr.zoidberg

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Year: 1997

Model: Cherokee

Engine: 4.0 straight 6

Quote:

Originally Posted by dr.zoidberg

I ran the codes.....then replaced the relays and ran the codes again. I didnt clear them yet.

Cleared the codes......tried to start it and more of the same. No fuel....pump isn't getting power.

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03-21-2014, 01:23 AM

DFlintstone

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Do a real good job checking fuses, Even the little ones. #17? Check'm good. You might also take a look at the wiring to your downstream 02 sensor. (No harm in that). Should throw a code if they shorted and took out the asd fuse, but easy enough to take a peek.