Code 34 - Exhaust Gas RECIRCULATION (EGR) Solenoid Valve
NOTE:
Refer to illustration for ECM connector terminal identification. See Figure
.
- Turn ignition on. Using a DVOM, check voltage between ECM connector terminal D14 (backprobe) and ground. Voltage should be 10 volts or greater. If voltage is not as specified, go to next step. If voltage is as specified, go to step 4).
- Turn ignition off. Disconnect ECM and main relay connectors. Using an ohmmeter, check resistance between ECM connector terminal D14 and main relay connector terminal No. 1 (Black/White wire). Resistance should be zero ohms. If resistance is as specified, go to next step. If resistance is not as specified, repair circuit as necessary.
- Turn ignition on. Using a DVOM, check voltage between ground and main relay connector terminals No. 1 (Black/White wire) and 2 (Brown/Black wire). Voltage should be 10 volts or greater at both terminals. If voltage is as specified, replace main relay. If voltage is not as specified, repair appropriate circuit as necessary.
- Turn ignition on. Using a DVOM, check voltage between ECM connector terminal D22 (backprobe) and ground. Voltage should be 7 volts or greater. If voltage is not as specified, go to next step. If voltage is as specified, check ECM connector terminals for good contact. Repair terminals as necessary. If connector terminals are okay, replace ECM.
- Turn ignition off. Remove collector and disconnect EGR solenoid valve connector. Using an ohmmeter, check resistance between ECM connector terminal D22 and EGR solenoid valve connector terminal No. 2 (White/Black wire). Resistance should be zero ohms. If resistance is as specified, replace EGR solenoid valve. If resistance is not as specified, repair circuit as necessary.