ENGINE (DIAGNOSTICS)(H4DOTC DIESEL) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0204 CYLINDER 4 - INJECTOR CIRCUIT

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Poor driving performance

• Erroneous idling

• Engine stalls.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode and Inspection Mode

WIRING DIAGRAM:

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1.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is DTC P2146 or P2149 displayed?

Check the appropriate DTC using the “List of Diagnostic Trouble Code (DTC)”.

2.CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM and fuel injector on faulty cylinders.

3) Measure the resistance of harness between ECM connector and fuel injector connector.

Connector & terminal

#1 (B134) No. 21 — (E5) No. 1:

#1 (B134) No. 39 — (E5) No. 2:

#1 (B134) No. 40 — (E5) No. 2:

#2 (B134) No. 21 — (E16) No. 1:

#2 (B134) No. 37 — (E16) No. 2:

#2 (B134) No. 38 — (E16) No. 2:

#3 (B134) No. 20 — (E6) No. 1:

#3 (B134) No. 18 — (E6) No. 2:

#3 (B134) No. 19 — (E6) No. 2:

#4 (B134) No. 20 — (E17) No. 1:

#4 (B134) No. 16 — (E17) No. 2:

#4 (B134) No. 17 — (E17) No. 2:

Is the resistance less than 1 Ω?

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit in harness between ECM connector and fuel injector connector

• Poor contact in coupling connector

3.CHECK FUEL INJECTOR.

Measure the resistance between fuel injector terminals on faulty cylinder.

Terminals

No. 1 — No. 2:

Is the resistance 0.2 — 1 Ω?

Repair the poor contact of the ECM connector or fuel injector connector.

Replace the faulty fuel injector.