DTC P0512: Starter (Switch) Request Circuit: Notes

1. -

DTC detecting condition:

Detected when three consecutive driving cycles with fault occur.

Trouble symptom:

Auto Start Stop does not operate.

Wiring diagram:

Auto Start Stop. Ref. to WIRING SYSTEM>AUTO START STOP .

G13228211

Courtesy of SUBARU OF AMERICA, INC.

CAUTION:

Use the check board when measuring the TCM terminal voltage and resistance.
After servicing or replacing faulty parts, perform the last step of the basic diagnostic procedure. Ref. to AUTO START STOP (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

CHECK DATA MONITOR .
1. Turn the ignition switch to ON. (Engine OFF)
2. Read the data of [Starter Switch] using Subaru Select Monitor. Ref. to AUTO START STOP (DIAGNOSTICS)>DATA MONITOR .
Is [ON] displayed in [Starter Switch]?

Yes : Go to 2 .

No : The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK INPUT VOLTAGE OF TCM .
1. Turn the ignition switch to OFF.
2. Disconnect the TCM connector.
3. Turn the ignition switch to ON.
4. Measure the voltage between TCM and chassis ground.
  Connector & terminal
  
  (T10) No. 45 (+) - Chassis ground (-):
  
  Is the voltage 10 V or more?
  
  Yes : Check the following item and repair if necessary.
  - Model with push button start Repair the short circuit to power supply in harness between keyless access Control Module and TCM connector.
  - Model without push button start Short circuit to power supply in harness between ignition switch and TCM connector Sticking inside the ignition switch
  No : Check for poor contact of TCM connector. Replace the TCM if no fault is found. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSMISSION CONTROL MODULE (TCM) .