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DTC P1190 [MZR-CD (RF Turbo)]

BME010201100W01

DTC P1190 | Calibration resistor circuit malfunction
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DETECTION CONDITION | • PCM monitors input voltage from calibration resistor while engine is running. If input voltage from calibration resistor is below 0.2 V or above 4.8 V, PCM determines calibration resistor circuit malfunction.
POSSIBLE CAUSE | • Calibration resistor malfunction • Connector or terminal malfunction • Short to GND in wiring between calibration resistor terminal A and PCM terminal 37, 62, 89, 11 • Short to power circuit in wiring between calibration resistor terminal A and PCM terminal 37, 62, 89, 11
• Open circuit in wiring between calibration resistor terminal A and PCM terminal 37, 62, 89, 11
• Open circuit in wiring between calibration resistor terminal C and PCM terminal 91
• 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 CALIBRATION RESISTOR 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 8.
No | Go to next step.
3 | INSPECT CALIBRATION RESISTOR SIGNAL CIRCUIT FOR SHORT TO GND • Turn engine switch to OFF. • Inspect continuity between calibration resistor terminal A and body GND. • Is there continuity? | Yes | Repair or replace harness for short to GND, go to Step 8.
No | Go to next step.
4 | INSPECT CALIBRATION RESISTOR SIGNAL CIRCUIT FOR SHORT TO POWER • Turn engine switch to ON (Engine OFF). • Inspect voltage between calibration resistor terminal A and body GND. • Is voltage below 1.0V? | Yes | Go to next step.
No | Repair or replace harness for short to power, go to Step 8.
5 | INSPECT CALIBRATION RESISTOR • Inspect calibration resistor. (See CALIBRATION RESISTOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace calibration resistor, go to Step 8.
No | Go to next step.
6 | 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 Step 8.
No | Go to next step.
7 | INSPECT CALIBRATION RESISTOR CIRCUIT FOR OPEN • Turn engine switch to OFF. • Inspect continuity between following harnesses:

  - Calibration resistor terminal A and PCM terminal 37, 62, 89, 11.
  - Calibration resistor terminal C and PCM terminal 91.

• Is there continuity?
Yes
Go to next step.
No | Repair or replace harness for open, go to next step.
8 | VERIFY TROUBLESHOOTING OF DTC P1190 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.
9 | 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.