DTC P162A: Starter Interlock Internal Circuit: Notes

1. -

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling
Poor driving performance

Wiring diagram:

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

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>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) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

CHECK INPUT VOLTAGE OF ECM .
1. Disconnect the connector from ECM.
2. Turn the ignition switch to ON.
3. Measure the voltage between ECM connector and engine ground.
  Connector and terminal
  
  (B134) No. 67 (+) - Engine ground (-):
  
  (B134) No. 68 (+) - Engine ground (-):
Is the voltage 10 - 13 V?

Yes : Go to 2 .

No : Repair the following item.
- Open circuit in harness between ECM connector and battery terminal
- Blown out of fuse
- Replace main relay
- Replace M/B
CHECK ECM GROUND HARNESS .
1. Connect all connectors.
2. Turn the ignition to ON.
3. Measure the voltage between ECM connector and engine ground.
  Connector and terminal
  
  (B134) No. 69 (+) - Engine ground (-):
  
  (B134) No. 70 (+) - Engine ground (-):
  
  (B134) No. 71 (+) - Engine ground (-):
  
  (B134) No. 72 (+) - Engine ground (-):
Is the voltage less than 1 V?

Yes : Go to 3 .

No : Repair the following item.
- Open circuit in ground circuit
- Loose engine ground terminal
- Poor contact of coupling connector
CHECK DTC .
Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine].
Ref. to COMMON (DIAG)>CLEAR MEMORY .
Perform the corresponding inspection mode.
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>INSPECTION MODE .
Using Subaru Select Monitor, check the readiness code of [Engine].
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>ALL READINESS DIAGNOSTIC CODE(S) .

Is DTC P162A displayed as a readiness code?

Yes : Check the connector for poor contact and check the harness. Replace the ECM if no fault is found. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM) .

No : Even if DTC is detected, the circuit has returned to a normal condition at this time.

Reproduce the failure, and then perform the diagnosis again.