EVAP Canister Purge Valve Circuit
WARNING:
DO NOT try to suck air through purge valve. Fuel vapors inside valve are extremely harmful.
- Disconnect purge valve vacuum hoses from vacuum pipes. Blow air into purge valve port "A". See Fig 1. Air should not come out of port "B". If using scan tool, go to next step. If scan tool is not available, go to step 3.
- Connect scan tool to Data Link Connector (DLC). Turn ignition on. Select MISC TEST mode and use scan tool to turn EVAP canister purge valve on. Blow air into purge valve port "A". Air should now come out of port "B". If purge valve operates as described, purge valve and circuit are working properly. If operation is not as described, inspect for poor connections or open/short circuits in wiring between purge valve, PCM and fuse box. If wiring and connections are okay, go to EVAP CANISTER PURGE VALVE .
- Turn ignition on. Using fused jumper wire, ground PCM terminal C21-7 on Esteem 1.6L and Swift, C20-6 on Esteem 1.8L, C51-2-17 on Vitara 1.6L and 2.0L, and C51-2-1 on Grand Vitara 2.5L. See PIN VOLTAGE/CIRCUIT RESISTANCE CHARTS article for PCM connector and terminal identification. Blow air into purge valve port "A". Air should now come out of port "B". If purge valve operates as described, purge valve and circuit are working properly. If operation is not as described, inspect for poor connections or open/short circuits in wiring between purge valve, PCM and fuse box. If wiring and connections are okay, go to EVAP CANISTER PURGE VALVE .