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DTC P1190 [MZR-CD (RF Turbo)]

BME010201100201

DTC P1190 | Calibration resistor circuit malfunction
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DETECTION CONDITION | • The PCM monitors the input voltage from the calibration resistor of each cylinder. If the PCM detects that the input voltage for any cylinder is more than 4.8 V or less than 0.2 V, the PCM determines calibration resistor malfunction. Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE CAUSE | • Calibration resistor malfunction • Connector or terminal malfunction • Short to power supply in wiring harness between each cylinder calibration resistor terminal A and PCM terminal 37, 62, 89, 11 • Open circuit in wiring harness between each cylinder calibration resistor terminal A and PCM terminal 37, 62, 89, 11
• Open circuit in wiring harness between each cylinder calibration resistor terminal C and PCM terminal 91

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | VERIFY CURRENT SIGNAL STATUS: IS CONCERN INTERMITTENT OR CONSTANT? • Connect the WDS or equivalent to the DLC-2. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Perform the "INTERMITTENT CONCERN TROUBLESHOOTING". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
4 | INSPECT CALIBRATION RESISTOR CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Inspect for poor connection calibration resistor connector for each cylinder (such as damaged/pulled-out terminals, corrosion). • Is there any malfunction? | Yes | Repair or replace the suspected terminal, go to Step 9.
No | Go to the next step.
5 | INSPECT CALIBRATION RESISTOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Turn the engine switch to the ON position (Engine off). • Disconnect all cylinder's calibration resistor connectors. • Inspect the voltage at calibration resister terminal A for each cylinder (wiring harness-side) and body GND.
• Is the voltage B+?
Yes
Repair or replace the wiring harness for a short to power supply for the suspected cylinder, then go to Step 9.
No | Go to the next step.
6 | INSPECT CALIBRATION RESISTOR • Inspect the calibration resistor. (See CALIBRATION RESISTOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace the calibration resistor, then go to Step 9.
No | Go to the next step.
7 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the engine switch off. • Inspect for poor connection (such as damaged/pulled-out terminals, corrosion). • Is there any malfunction? | Yes | Repair or replace the suspected terminal, then go to Step 9.
No | Go to the next step.
8 | INSPECT CALIBRATION RESISTOR FOR OPEN CIRCUIT • Turn the engine switch off. • Inspect for continuity between following terminals (wiring harness-side harness):

  - No.1 cylinder calibration resistor terminal A and PCM terminal 37
  - No.2 cylinder calibration resistor terminal A and PCM terminal 62
  - No.3 cylinder calibration resistor terminal A and PCM terminal 89
  - No.4 cylinder calibration resistor terminal A and PCM terminal 11
  - Each cylinder calibration resistor terminal C and PCM terminal 91

• Is there continuity?
Yes
Go to the next step.
No | Repair or replace the wiring harness for the suspected circuit, then go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P1190 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC using the WDS or equivalent. • Start the engine. • Is the PENDING CODE for this DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the Repair Verification Drive Mode. (See OBD DRIVE MODE [MZR-CD (RF Turbo)].) • Are any DTCs present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.