DTC P0512 [MZR-CD (RF Turbo)]


BME010200500W09

DTC P0512

Engine switch circuit malfunction

DETECTION CONDITION

• PCM monitors input voltage from engine switch while engine is running. If input voltage from engine switch is B+ when engine speed is 1,200 rpm or above, PCM determines engine switch circuit malfunction.

POSSIBLE CAUSE

• Engine switch malfunction
• Connector or terminal malfunction
• Short to power circuit in wiring between engine switch terminal A and PCM terminal 57
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
2
INSPECT POOR CONNECTION OF ENGINE SWITCH CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace suspected terminal, go to Step 6.
No
Go to next step.
3
INSPECT ENGINE SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER
• Turn engine switch to ON (Engine OFF).
• Inspect voltage between engine switch terminal A and body GND.
• Is voltage below 1.0 V?
Yes
Go to next step.
No
Repair or replace harness for short to power, go to Step 6.
4
INSPECT ENGINE SWITCH
• Inspect engine switch.
• Is there any malfunction?
Yes
Replace engine switch, go to Step 6.
No
Go to next step.
5
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn engine switch to OFF.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace suspected terminal, go to next step.
No
Go to next step.
6
VERIFY TROUBLESHOOTING OF DTC P0512 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Start engine.
• Is same DTC present?
Yes
Replace PCM, go to next step.
No
Go to next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.