Code 13 - Canister Purge Solenoid Control System Test
- Connect diagnostic readout box to engine harness connector. Ensure that carburetor switch is open. With ignition in "RUN" position, place read/hold switch in "HOLD" position.
- If voltmeter is pulsating and clicking, check for poor connection in harness circuit. If voltmeter is not pulsating but reads within 1 volt of battery voltage, go to step 3). If voltmeter is not pulsating but reads 0-1 volt, disconnect computer 14-wire connector. If voltage is now within 1 volt of battery voltage, replace computer. If not, go to step 4).
- Turn ignition switch off. Disconnect computer 14-wire connector. Connect voltmeter to cavity No. 13 of 14-wire connector and ground. Turn ignition switch to "RUN" position. If voltmeter reads within 1 volt of battery voltage, replace computer. If voltage is not okay, inspect wire from cavity 13 to canister purge control solenoid for open and repair as needed.
- Turn ignition switch off. Disconnect dual solenoid 3-wire connector. Connect ohmmeter between Blue and Green wires of dual solenoid 3-wire connector. If ohmmeter shows any resistance, inspect Green wire to computer for a short circuit to ground and repair. If circuit is open, replace canister purge solenoid.