DTC P1931 [MZ-CD 1.6 (Y6)]

id0102c3839700

DTC P1931

Fuel additive pump control circuit high
DETECTION CONDITION
•  The fuel additive control module monitors the fuel additive pump control circuit at the fuel additive control module terminal 9. If the fuel additive control module terminal 9 voltage above specified when the fuel additive pump turned to off, the fuel additive control module determines that the fuel additive pump control circuit high.
POSSIBLE CAUSE
•  Short to power between the fuel additive control module terminal 9 and fuel additive pump terminal D
•  Fuel additive pump malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the 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 REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT FUEL ADDITIVE PUMP CONTROL CIRCUIT FOR SHORT TO POWER
•  Turn the engine switch off.
•  Disconnect fuel additive control module and fuel additive pump connector.
•  Measure the voltage at harness-side connectors between fuel additive control module terminal 9 and ground.
•  Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness for short to power, then go to Step 5.
4
INSPECT FUEL ADDITIVE PUMP
•  Inspect the fuel additive pump.
•  Is the fuel additive pump okay?
Yes
Go to the next step.
No
Replace the fuel additive pump, then go to the next step.
5
VERIFY THAT DTC P1931 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the fuel additive control module memory using the M-MDS.
•  Start the engine and warm-up to normal operating temperature.
•  Retrieve the DTC using the M-MDS.
•  Is the PENDING CODE same DTC present?
Yes
Replace fuel additive control module, then go to the next step.
(See FUEL ADDITIVE CONTROL MODULE REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
•  Perform "After Repair Procedure".
•  Is there any DTC present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6 (Y6)].)
No
Troubleshooting completed.