LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2011 >> RX-8 R3, 1.3 4 >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System] >> DTC P1683
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

DTC P1683

DTC P1683 Metering oil pump NO. 1 circuit high input
DETECTION CONDITION 
  • The PCM monitors the input voltage from the metering oil pump NO. 1 when the battery voltage is more than 8 V  and the metering oil pump NO. 1 control signal turned from ON to OFF. If the input voltage is more than the specification, the PCM determines that the metering oil pump NO. 1 circuit has a malfunction.

Diagnostic support note 
  • This is a continuous monitor (other).
  • The MIL does not illuminate.
  • FREEZE FRAME DATA (Mode 2/Mode 12) is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Metering oil pump NO. 1 connector or terminals malfunction
  • Metering oil pump driver connector or terminals malfunction
  • PCM connector or terminals malfunction
  • Short to ground in wiring harness between metering oil pump driver terminal B and PCM terminal 1S
  • Short to power supply in wiring harness between metering oil pump NO. 1 terminal A and PCM terminal 1E
  • Short to power supply in wiring harness between metering oil pump driver terminal A and PCM terminal 1E
  • Metering oil pump NO. 1 malfunction
  • Metering oil pump driver malfunction
  • Open circuit in wiring harness between metering oil pump NO. 1 terminal A and metering oil pump driver terminal A
  • Open circuit in wiring harness between metering oil pump driver terminal B and PCM terminal 1S
  • PCM malfunction
G07878139
DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line 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.
2 INSPECT METERING OIL PUMP N0.1 CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the metering oil pump NO. 1 connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then go to Step 10.
No Go to the next step.
3 INSPECT METERING OIL PUMP DRIVER CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the metering oil pump driver connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then go to Step 10.
No Go to the next step.
4 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the connector and/or terminals, then go to Step 10.
No Go to the next step.
5 INSPECT METERING OIL PUMP DRIVER CIRCUIT FOR SHORT TO GROUND 
  • Metering oil pump NO. 1, metering oil pump driver and PCM connectors are disconnected.
  • Turn the ignition switch off.
  • Inspect for continuity between metering oil pump driver terminal B (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
No Go to the next step.
6 INSPECT METERING OIL PUMP NO. 1 AND METERING OIL PUMP DRIVER CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY 
  • Metering oil pump NO. 1, metering oil pump driver and PCM connectors are disconnected.
  • Turn the ignition switch to the ON position (engine off).
  • Measure the voltage between metering oil pump driver terminal A (wiring harness-side) and body ground.
  • Is there any voltage?
 Yes Repair or replace the wiring harness for a possible short to power supply following:
  • Between metering oil pump NO. 1 terminal A and PCM terminal 1E
  • Between metering oil pump driver terminal A and PCM terminal 1E

Go to Step 10.
No Go to the next step.
7 INSPECT METERING OIL PUMP NO. 1 
 Yes Replace the metering oil pump NO. 1, then go to Step 10.
(See METERING OIL PUMP REMOVAL/INSTALLATION ).
No Go to the next step.
8 INSPECT METERING OIL PUMP DRIVER 
 Yes Replace the metering oil pump driver, then go to Step 10.
(See METERING OIL PUMP DRIVER REMOVAL/INSTALLATION ).
No Go to the next step.
9 INSPECT METERING OIL PUMP NO. 1 AND METERING OIL PUMP DRIVER CIRCUIT FOR OPEN CIRCUIT 
  • Metering oil pump NO. 1, metering oil pump driver and PCM connectors are disconnected.
  • Turn the ignition switch off.
  • Inspect the continuity between the following circuits:
    • Metering oil pump NO. 1 terminal A (wiring harness-side) and metering oil pump driver terminal A (wiring harness-side)
    • Metering oil pump driver terminal B (wiring harness-side) and PCM terminal 1S (wiring harness-side)
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10 VERIFY TROUBLESHOOTING OF DTC P1683 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS.

    (See AFTER REPAIR PROCEDURE ).

  • Perform the KOER self test (See KOEO/KOER SELF TEST ).
  • Is the same DTC present?
 Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION ).
No Go to the next step.
11 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No DTC troubleshooting completed.
scientia non olet · About LEMON Manuals