DTC P0512 Starter (Switch) Request Circuit: Notes

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Failure of engine to start

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Inspection Mode .
Use the check board when measuring the ECM terminal voltage and resistance.

Wiring diagram:

Engine Electrical System Ref. to WIRING SYSTEM>Engine Electrical System>WIRING DIAGRAM .

Fig 1: Starter (Switch) Request - Wiring Diagram

G11270512

Courtesy of SUBARU OF AMERICA, INC.

CHECK PUSH BUTTON IGNITION SWITCH.
Operate the push button ignition switch.

Does it operate smoothly without catch?
- Yes: Go to 2.
- No: Replace the push button ignition switch. Ref. to SECURITY AND LOCKS>Push Button Ignition Switch .
CHECK DTC.
1. Clear the memory using the Subaru Select Monitor or general scan tool. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode .
2. Start and idle the engine for three minutes or more.
  Is the same DTC as current diagnosis output?
  - Yes: Go to 3.
  - 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.
    NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK HARNESS BETWEEN ECM AND KEYLESS ACCESS CONTROL MODULE.
1. Turn the ignition to OFF.
2. Disconnect the connector from ECM.
3. Turn the ignition to ON.
4. Measure the voltage between ECM and engine ground.
  Connector & terminal
  
  (B134) No. 45 (+) - Engine ground (-):
Is the voltage 10 V or more?
- Yes: Repair the short circuit to power supply in harness between ECM and keyless access control module.
- No: Repair the poor contact of ECM connector.