1997 Cadillac Deville

AJWHITE

MEMBER
1997 CADILLAC DEVILLE

Engine Performance problem
1997 Cadillac Deville V8 Automatic

HOW TO REPAIR OR REPLACE EVAP SOLENOID OUTPUT CIRCUIT

Sunday, May 16th, 2010 AT 1:23 PM

3 Replies

FACTORYJACK

MECHANIC
4,159 POSTS

You are not going to replace the evap solenoid circuit. Which solenoid are we speaking of, the vent solenoid, or the purge solenoid?

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Monday, May 17th, 2010 AT 11:30 PM

AJWHITE

MEMBER
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My car failed emissions the code was 1645 which states evap solenoid ouput circuit so dont know how to fix the problem

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Tuesday, May 18th, 2010 AT 10:41 AM

FACTORYJACK

MECHANIC
4,159 POSTS

P1645 is relevant to the EVAP purge solenoid. It could be PCM, purge solenoid, or circuitry. First, check the ECS fuse in the underhood fuse block, and the pink wire at the purge solenoid. It receives power from this fuse. The PCM controls the ground, without being able to cycle the output you would not be able to test the PCMs ability to control the solenoid. If there is power to the solenoid, the next step would be to check continuity of the dark green wire from the solenoid connector to PCM connector C2 pin 24. If there is continuity, I would start with a solenoid.

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Tuesday, May 18th, 2010 AT 11:23 PM