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Home >> Mazda >> 2012 >> 6 i Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (On-Board Diagnostic [Engine Controls MZI 3.7] (2 Of 5)) >> DTC P0201:00 >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different variant/trim than selected.
STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN RECORDED 
  • Has FREEZE FRAME DATA been recorded?
 Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins availability.
  • Is any related Service Bulletins available?
 Yes Perform repair or diagnosis according to available Service Bulletins.
  • If vehicle is not repaired, go to the next step.
No Go to the next step.
3 INSPECT FUEL INJECTOR NO. 1 CONNECTOR FOR POOR CONNECTION 
  • Switch the ignition to off.
  • Disconnect the fuel injector No. 1 connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Are there malfunction?
 Yes Repair or replace suspected part, then go to Step 10.
No Go to the next step.
4 INSPECT FUEL INJECTOR NO. 1 POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT 
  • Fuel injector No. 1 connector is disconnected.
  • Switch the ignition to ON (Engine off).
  • Measure the voltage between fuel injector No. 1 connector terminal B and body ground.
  • Is the voltage greater than 10 V?
 Yes Go to the next step.
No Repair open circuit, then go to Step 10.
5 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Fuel injector No. 1 connector is disconnected.
  • Switch the ignition to off.
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there malfunction?
 Yes Repair or replace suspected part, then go to Step 10.
No Go to the next step.
6 INSPECT FUEL INJECTOR NO. 1 SIGNAL CIRCUIT FOR OPEN INSPECT FOR OPEN CIRCUIT IN WIRING HARNESS 
  • Fuel injector No. 1 and PCM connectors are disconnected.
  • Measure the resistance between fuel injector No. 1 terminal A (wiring harness-side) and PCM terminal 2BQ (wiring harness-side).
  • Is the resistance less than 5 ohms?
 Yes Go to the next step.
No Repair for on open circuit, then go to Step 10.
7 INSPECT FUEL INJECTOR NO. 1 SIGNAL CIRCUIT FOR SHORT TO GROUND IN WIRING HARNESS 
  • Fuel injector No. 1 and PCM connectors are disconnected.
  • Measure the resistance between fuel injector No. 1 connector terminal A (wiring harness-side) and body ground.
  • Is the resistance greater than 10 kilohms?
 Yes Go to the next step.
No Repair for short circuit, then go to Step 10.
8 INSPECT FUEL INJECTOR NO. 1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY IN WIRING HARNESS 
  • Fuel injector No. 1 and PCM connectors are disconnected.
  • Switch the ignition to ON (Engine off).
  • Measure the voltage between fuel injector No. 1 terminal A (wiring harness-side) and body ground.
  • Is any voltage present?
 Yes Repair for short circuit, then go to Step 10.
No Go to the next step.
9 INSPECT FUEL INJECTOR NO. 1 
 Yes Replace the fuel injector No. 1, then go to the next step.
No Go to the next step.
10 VERIFY TROUBLESHOOTING OF DTC P0201:00 HAS BEEN COMPLETED 
  • Verify that all disconnected connectors reconnected.
  • Clear the DTC from the PCM memory using the M-MDS.
  • Start the engine.
  • Perform the KOEO or KOER self-test.

    (See KOEO/KOER SELF TEST .)

  • Is same DTC present?
 Yes Repeat the inspection from Step 1.

Go to the next step.
No Go to the next step.
11 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
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