2000 Sunbird L4-121 2.0L VIN B 2-bbl (1984)
Canister Purge Control Valve: Testing and Inspection
Component Diagnostic Charts - Throttle Body Fuel Injection
Fig. 097 - Wiring Diagram for Chart C-3 Canister Purge Valve. VIN P
CHART C-3, CANISTER PURGE CHECK
Canister purge is controlled by a solenoid that allows manifold vacuum to purge the canister when de-energized. The ECM supplies a ground to
energize the solenoid (purge off).
If the diagnostic test terminal is grounded with the engine stopped or the following is met with the engine running the purge solenoid is de-energized
(purge on).
a. Engine run time after start more than 1 min.
b. Coolant temperate above 80°C
c. Vehicle speed above 5 mph.
d. Throttle off idle. TPS signal about .75 volt.
