DTC P0616: Starter Relay "A" Circuit Low: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom: Failure of engine to start

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 .

Model without push button start

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.
Model with push button start

Courtesy of SUBARU OF AMERICA, INC.

Courtesy of SUBARU OF AMERICA, INC.

CHECK HARNESS BETWEEN ECM AND STARTER RELAY (OPEN).
1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Remove the starter relay.
4. Measure the resistance of harness between ECM connector and M/B (starter relay) terminal.
  Connector and terminal.
  
  (B134) No. 19 - No. 3:
Is the resistance less than 1 Ω?

Yes: Go to 2.

No: Repair the open circuit of harness between ECM connector and M/B (starter relay).
CHECK HARNESS BETWEEN ECM AND STARTER RELAY (SHORT TO GROUND).
1. Disconnect the connector from starter motor.
2. Measure the resistance between the ECM connector and engine ground.
  Connector and terminal.
  
  (B134) No. 19 - Engine ground:
Is the resistance 1 MΩ or more?

Yes: Repair the poor contact of ECM connector.

No: Repair the short circuit to ground in harness between ECM connector and M/B (starter relay).