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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0111 [BP, BP WITH TC] DIAGNOSTIC PROCEDURE

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 repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for 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.
3 INSPECT IAT SENSOR (BP) IAT SENSOR NO.1 (BP WITH TC) CONNECTOR FOR POOR CONNECTION 
  • Turn the ignition switch off.
  • Disconnect IAT sensor (BP), IAT sensor No.1 (BP WITH TC) connector.
  • Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 7.
No Go to the next step.
4 INSPECT IAT SENSOR (BP) IAT SENSOR NO.1 (BP WITH TC) 
  • Inspect the IAT sensor (BP), IAT sensor No.1 (BP WITH TC).
  • Is there any malfunction?
 Yes Replace IAT sensor (BP), IAT sensor No.1 (BP WITH TC) then go to Step 7.
No Go to Step 6.(BP)
Go to the next step. (BP WITH TC)
5 INSPECT ECT SENSOR 
  • Inspect the ECT sensor.
  • Is there any malfunction?
 Yes Replace the ECT sensor, then go to Step 7.
No Go to the next Step.
6 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Disconnect PCM connector.
  • Check for poor connection at terminals 4N and 4O (damaged, pulled-out pins, corrosion, etc.).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to the next step.
No Go to the next step.
7 VERIFY TROUBLESHOOTING OF DTC P0111 COMPLETED 
  • Make sure to connect all disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Start engine and run it under FREEZE FRAME DATA condition.
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
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