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

DTC P2148 INJECTOR DRIVER (BATTERY SHORT)

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

Engine stalls.

CAUTION:

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

WIRING DIAGRAM:

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1.CHECK HARNESS BETWEEN ECM AND ENGINE GROUND.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM.

3) Measure the resistance of harness between ECM connector and chassis ground.

Connector & terminal

(B134) No. 1 — Chassis ground:

(B134) No. 2 — Chassis ground:

(B134) No. 3 — Chassis ground:

(B134) No. 4 — Chassis ground:

Is the resistance less than 5 Ω?

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM connector and engine ground

• Poor contact of coupling connector

2.CHECK FUEL INJECTOR DRIVE POWER SUPPLY.

1) Connect the connector to ECM.

2) Turn the ignition switch to ON.

3) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 73 (+) — Chassis ground (−):

(B135) No. 49 (+) — Chassis ground (−):

Is the voltage 4 — 7 V?

Repair the poor contact of ECM connector.

3.CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from the ECM and fuel injectors #1 and #2.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B135) No. 73 (+) — Chassis ground (−):

(B135) No. 74 (+) — Chassis ground (−):

(B135) No. 49 (+) — Chassis ground (−):

(B135) No. 51 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Repair the short circuit to power in harness between ECM connector and fuel injector connectors.

Repair the poor contact of ECM connector.