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Diagnostic procedure

DTC P2127 [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 CLASSIFY APP SENSOR OR HARNESS MALFUNCTION 
  • Connect WDS or equivalent.
  • Access APP2 PID.
  • Disconnect throttle body connector.
  • Connect a jumper wire between APP sensor terminals A and C (harness-side).
  • Is PID approx. 100%? 
 Yes Go to the next step.
No Go to step 5.
4 INSPECT APP SENSOR 
 Yes Inspect for poor APP sensor connector terminal A connection. Repair or replace if necessary, then go to Step 8.
No Replace APP sensor, then go to Step 8.
5 INSPECT POWER SUPPLY CIRCUIT VOLTAGE AT APP SENSOR CONNECTOR 
  • Turn ignition switch to ON (Engine off).
  • Measure voltage at APP sensor terminal A (harness-side).
  • Is voltage within 4.5-5.5 V? 
 Yes Go to the next step.
No Repair or replace open circuit between APP sensor connector terminal A and PCM connector terminal 8(1), 2K(2) (harness-side).
Then, then go to Step 8.
6 VERIFY APP2 SIGNAL CIRCUIT FOR OPEN CIRCUIT 
  • Turn the ignition switch off.
  • Inspect continuity between APP sensor terminal C (harness-side) and PCM terminal 42(1), 2A(2) (harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace suspected harness, then go to Step 8.
7 VERIFY APP2 SIGNAL CIRCUIT FOR SHORT TO GROUND 
  • Inspect continuity between APP sensor terminal C (harness-side) and body ground.
  • Is there continuity?
 Yes Repair or replace suspected harness, then go to the next step.
No Go to the next step.
8 VERIFY TROUBLESHOOTING OF DTC P2127 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Turn ignition switch to ON (Engine off).
  • Clear the DTC from the PCM 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 Go to the next step.
9 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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