DTC P1190 [MZR-CD (RF Turbo)]

BME010201100W01

DTC P1190

Calibration resistor circuit malfunction

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

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.
• 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.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.