Dtc P0512 - Mazda 6 Workshop Manual

STEP
12 INSPECT BRAKE SWITCH 1 SIGNAL CIRCUIT
FOR SHORT TO GND
• Turn the engine switch off.
• Inspect for continuity between brake switch
terminal D and body GND.
• Is there continuity?
13 INSPECT BRAKE SWITCH 1 SIGNAL CIRCUIT
FOR OPEN CIRCUIT
• Turn the engine switch off.
• Inspect for continuity between brake switch
terminal D and PCM terminal 7.
• Is there continuity?
14 INSPECT BRAKE SWITCH 2 SIGNAL CIRCUIT
FOR SHORT TO POWER
• Turn the engine switch to the ON position
(Engine off).
• Inspect the voltage between brake switch
terminal D and body GND.
• Is the voltage B+?
15 VERIFY TROUBLESHOOTING OF DTC P0504
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Depress and release the brake pedal for 10
times.
• Is the same DTC present?
16 VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
(See F2–39 OBD DRIVE
• Are any DTCs present?
End Of Sie

DTC P0512

DTC P0512 Engine switch circuit high input
• The PCM monitors the engine speed and the starter signal. If the engine speed is more than 700 rpm and
the starter switch ON signal is input, the PCM determines that there is a malfunction in the starter switch
circuit.
DETECTION
Diagnostic support note
CONDITION
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
• Engine switch malfunction
• Starter relay malfunction
• Connector or terminal malfunction
POSSIBLE
• Short to power supply in wiring harness between starter relay terminal A and PCM terminal 78
CAUSE
• Short to power supply in wiring harness between engine switch terminal A and starter relay terminal B
• PCM malfunction
ON-BOARD DIAGNOSTIC
INSPECTION
MODE.)
Yes Repair or replace the wiring harness for a short to GND, go
to Step 15.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for an open circuit, go
to Step 15.
Yes Repair or replace the wiring harness for a short to power
supply, go to the next step.
No Go to the next step.
Yes Replace the PCM, go to the next step.
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See F2–40 DTC TABLE.)
No Troubleshooting completed.
ACTION
B6E407000500103
F2–137
F2