Astro Van L AWD V6-262 4.3L VIN Z (1994)
Cannister Purge Solenoid Check
Circuit Description:
12 volts is applied to CKT 439 at terminal "A" when the ignition key is turned "ON". As the engine coolant temperature rises during engine operation
(45~C - 113~F) or when short term fuel trim count is > 122, the control module will then ground CKT 428 at terminal "B". The purge solenoid will then
open the vapor canister to purge the fuel, and direct it to the intake manifold for normal combustion when it is needed.
Test Description:
