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DTC P0512 [MZR-CD (RF Turbo)]

BME010200500W09

DTC P0512 | Engine switch circuit malfunction
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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
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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. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.