Check Output Signal Circuit

Turn engine off. Leave ECM disconnected. Disconnect EGR and canister control solenoid valve wiring harness connector. See Figure . Check continuity between ECM terminal No. 105 (Gray wire) and ground. See Figure and Figure . Check continuity between EGR and canister control solenoid valve harness connector terminal "a" (White/Green wire) and ground. If continuity is present, repair wiring harness or connectors as necessary. If continuity is not present, go to next step.