DTC P162A: Starter Interlock Internal Circuit: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Improper idling
Poor driving performance

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 .

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM (CROSSTREK MODEL>Engine Electrical System>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

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 chassis ground.
  Connector & terminal
  
  (B134) No. 67 (+) - Chassis ground (-):
  
  (B134) No. 68 (+) - Chassis ground (-):
Is the voltage 10 - 13 V?

Yes: Go to 2.

No: Repair the power supply line.
NOTE:
In this case, 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 chassis ground.
  Connector & terminal
  
  (B134) No. 69 (+) - Chassis ground (-):
  
  (B134) No. 70 (+) - Chassis ground (-):
  
  (B134) No. 71 (+) - Chassis ground (-):
  
  (B134) No. 72 (+) - Chassis ground (-):
Is the voltage less than 1 V?

Yes: Go to 3.

No: Repair the harness and connector.
NOTE:
In this case, repair the following item:
- Open circuit in ground circuit
- Loose engine ground terminal
CHECK DTC .
1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (diag)>CLEAR MEMORY .
  Clear Memory
2. Perform inspection mode using the Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>INSPECTION MODE .
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.