Electronic diagrams
Chasing a gremlin
looking for electronic diagrams for 07 Avalanche Evac system error but valve is okay Intermittent oil pressure gauge error Stabilitrac and Traction control error Truck stuck in limp mode |
Evac...What system is that?
there are over 200 diagrams...be specific post the codes that are set. |
449 evap solenoid vent valve
and 641 sens A voltage circuit open/reference voltage circuit open |
vent solenoid code
find the vent solenoid...it will have a 2 wire connector. disconnect it. one wire is supplied battery voltage at key on one wire is grounded by the pcm when the pcm commands the vent closed. to test check for battery voltage on the one wire. reinstall the connector...jumper the other wire to grd….the solenoid should close and make a click sound...when the grd is removed the solenoid should release and click. if you hear nothing, replace the solenoid. if the solenoid works... either the grd wire to the pcm is open or the pcm is not commanding grd the other code is a p code or body chassis or undefirned u code? p0641? p1641 p2641 |
Gremlin
The cable has power but ground is open somewhere.
It is a P0641. code Is there any relationship to the intermittent oil sensor fault |
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