DTC P062D: Fuel Injector Driver Circuit Performance Bank 1: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Engine does not start.
Engine stalls.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK DTC.
Turn the ignition switch to ON.
Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC P062D displayed? (Current malfunction)

Yes: Go to 4.

No: Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Measure the resistance between ECM connectors.
  Connector and terminal.
  
  #1 (E159) No. 1 - (E159) No. 2:
  
  #2 (E159) No. 9 - (E159) No. 10:
  
  #3 (E159) No. 17 - (E159) No. 18:
  
  #4 (E159) No. 25 - (E159) No. 26:
Is the resistance approx. 1.5 Ω (at 23°C (73°F))?

Yes: Go to 6.

No: Go to 5.
CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR (OPEN).
1. Disconnect the connector from fuel injector.
2. Measure the resistance of harness between ECM connector and defective fuel injector connector.
  Connector and terminal.
  
  #1 (E159) No. 1 - (E5) No. 1:
  
  #1 (E159) No. 2 - (E5) No. 2:
  
  #2 (E159) No. 9 - (E16) No. 1:
  
  #2 (E159) No. 10 - (E16) No. 2:
  
  #3 (E159) No. 17 - (E6) No. 1:
  
  #3 (E159) No. 18 - (E6) No. 2:
  
  #4 (E159) No. 25 - (E17) No. 1:
  
  #4 (E159) No. 26 - (E17) No. 2:
Is the resistance less than 1 Ω?

Yes: Repair or replace the following items.
- Poor contact of fuel injector connector
- Defective fuel injector Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>FUEL INJECTOR .
No: Repair the open circuit of the harness between the ECM connector and fuel injector connector.
CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.
Measure the resistance between the ECM connector and engine ground.

Connector and terminal.

#1 (E159) No. 1 - Engine ground:

#1 (E159) No. 2 - Engine ground:

#2 (E159) No. 9 - Engine ground:

#2 (E159) No. 10 - Engine ground:

#3 (E159) No. 17 - Engine ground:

#3 (E159) No. 18 - Engine ground:

#4 (E159) No. 25 - Engine ground:

#4 (E159) No. 26 - Engine ground:

Is the resistance 1 MΩ or more?

Yes: Repair the poor contact of ECM connector.

No: Go to 7.
CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR (SHORT TO GROUND).
1. Disconnect the connector from fuel injector.
2. Measure the resistance between ECM connector and engine ground on defective fuel injectors.
  Connector and terminal.
  
  #1 (E159) No. 1 - Engine ground:
  
  #1 (E159) No. 2 - Engine ground:
  
  #2 (E159) No. 9 - Engine ground:
  
  #2 (E159) No. 10 - Engine ground:
  
  #3 (E159) No. 17 - Engine ground:
  
  #3 (E159) No. 18 - Engine ground:
  
  #4 (E159) No. 25 - Engine ground:
  
  #4 (E159) No. 26 - Engine ground:
Is the resistance 1 MΩ or more?

Yes: Replace the faulty fuel injector. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>FUEL INJECTOR .

No: Repair the short circuit to ground in harness between ECM connector and fuel injector connector.