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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2228 [L3]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 online 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 CONNECTION OF BARO SENSOR CONNECTOR 
  • Turn the ignition switch off.
  • Verify that BARO sensor connector is connected securely.
  • Is connection normal?
 Yes Go to the next step.
No Reconnect the connector, then go to Step 9.
4 INSPECT BARO SENSOR CONNECTOR FOR POOR CONNECTION 
  • Disconnect the BARO sensor connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace suspected terminal, then go to Step 9.
No Go to the next step.
5 INSPECT BARO SENSOR MALFUNCTION 
 Yes Go to the next step.
No Replace BARO sensor, then go to Step 9.
6 INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT BARO SENSOR CONNECTOR 
NOTE:
  • If DTCs P0107 and P0122 are also retrieved with P2228, go to NO. 29 CONSTANT VOLTAGE troubleshooting procedure.
  • Measure voltage between BARO sensor terminal C (harness-side) and body ground.
  • Is voltage within 4.5-5.5 V? 
 Yes Go to the next step.
No Inspect for open circuit between PCM terminal 33(1), 2K(2) (harness-side) and BARO sensor terminal C (harness-side).
Repair or replace suspected harness, then go to Step 9.
7 INSPECT BARO SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND 
  • Turn the ignition switch off.
  • Disconnect PCM connector.
  • Inspect for continuity between BARO sensor terminal B (harness-side) and body ground.
  • Is there continuity?
 Yes Repair or replace suspected harness, then go to Step 9.
No Go to the next step.
8 INSPECT PCM CONNECTOR FOR POOR CONNECTION 
  • Disconnect PCM connector.
  • Inspect for poor connection at PCM terminal 20(1), 2H(2) (such as damaged, pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to the next step.
No Go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P2228 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to ON (Engine off).
  • Clear the DTC from the memory using the WDS or equivalent.
  • Start engine and warm it up completely.
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No No concern is detected. Go to the next step.
10 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
(1) California emission regulation applicable ATX model
(2) Except for California emission regulation applicable ATX model
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