1997 Cadillac Deville

1997 CADILLAC DEVILLE
Avatar
AJWHITE
  • MEMBER
  • 2 POSTS
Engine Performance problem
1997 Cadillac Deville V8 Automatic

HOW TO REPAIR OR REPLACE EVAP SOLENOID OUTPUT CIRCUIT
May 16, 2010 at 1:23 PM
Advertisement
Avatar
FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
You are not going to replace the evap solenoid circuit. Which solenoid are we speaking of, the vent solenoid, or the purge solenoid?
May 17, 2010 at 11:30 PM
Avatar
AJWHITE
  • MEMBER
  • 2 POSTS
my car failed emissions the code was 1645 which states evap solenoid ouput circuit so dont know how to fix the problem
May 18, 2010 at 10:41 AM
Avatar
FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
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.
May 18, 2010 at 11:23 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.