Code 34: Exhaust Gas RECIRCULATION (EGR) Solenoid Valve
NOTE:
Refer to illustration for ECU connector and terminal identification. See Figure
.
- Turn ignition switch to ON position. Using a DVOM, check voltage between ECU connector B62, terminal No. 14 (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 switch to OFF position. Disconnect ECU and main relay connectors. Using an ohmmeter, check resistance between ECU connector B62, terminal No. 14 and main relay connector terminal No. 4 (Yellow 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 switch to ON position. 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 switch to ON position. Using a DVOM, check voltage between ECU connector B62, terminal No. 22 (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 ECU connector terminals for good contact. Repair as necessary. If connector terminals are okay, replace ECU.
- Turn ignition switch to OFF position. Remove collector and disconnect EGR solenoid valve connector. Using an ohmmeter, check resistance between ECU connector B62, terminal No. 22 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.