DTC 34

Diagnostic Chart:

Wiring Diagram:

DIAGNOSTIC CHART AND DIAGRAM


1. CHECK ECU VOLTAGE
1) With ignition "ON," measure voltage between ECU and ground.

Connector & Terminal/Specified value
(B62) No. 4 - ground/10 V, min


2. CHECK HARNESS CONNECTOR BETWEEN ECU AND MAIN RELAY
1) Turn ignition "OFF".
2) Disconnect ECU and main relay connectors.
3) Measure resistance between ECU connector and relay connector.

Connector & Terminal/Specified value
(B62) No. 14 - (B52) No. 4/0 ohms

3. CHECK POWER SUPPLY TO MAIN RELAY
1) Turn ignition "ON".
2) Disconnect main relay connector.
3) Measure voltage between relay connector and ground.

Connector & Terminal/Specified value
(B52) No. 1 - ground/10 V, min.
(B52) No. 2 - ground/10 V, min

4. CHECK INPUT SIGNAL FROM EGR CONTROL SOLENOID
1) Turn ignition "ON".
2) Disconnect main ECU connector.
3) Measure voltage between ECU connector and ground.

Connector & Terminal/Specified value
B62(22) & ground min 7 VDC

Harness:

5. CHECK HARNESS CONTINUITY BETWEEN ECU AND EGR SOLENOID
1) Turn ignition "OFF".
2) Disconnect ECU and solenoid connectors.
3) Measure resistance between ECU connector and solenoid connector.

Connector & Terminal/Specified value
(B62) No. 22 - (E16) No. 2/0 ohms