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Home >> Mazda >> 2022 >> CX-5 Turbo Signature >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (On-Board Diagnostic - Engine Control System (VIN M) (5 Of 7)) >> DTC P2123-00: App Sensor No. 1 Circuit High Input >> Diagnostic Procedure

Diagnostic Procedure

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DTC P2123-00: (PCM, VIN M) DIAGNOSTIC PROCEDURE

STEP INSPECTION RESULTS ACTION
1 RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
NOTE:
  • Recording can be facilitated using the screen capture function of the PC.
  • Record the FREEZE FRAME DATA/snapshot data on the repair order.
 - Go to the next step.
2 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.
3 DETERMINE IF APP SENSOR No. 1 OR WIRING HARNESS MALFUNCTION
  • Access the APP1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ).
  • Verify the APP1 PID value.
  • Is the APP1 PID value 5 V or B+?
 Yes Go to Step 7.
No Go to the next step.
4 INSPECT APP SENSOR CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the APP sensor 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 9.
No Go to the next step.
5 INSPECT PCM CONNECTOR CONDITION
  • 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 9.
No Go to the next step.
6 INSPECT APP SENSOR No. 1 Yes Replace the accelerator pedal, then go to Step 9.
(See ACCELERATOR PEDAL REMOVAL/INSTALLATION [VIN M] ).
No Go to Step 9.
7 INSPECT APP SENSOR No. 1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
  • Switch the ignition off.
  • Disconnect the APP sensor connector.
  • Access the APP1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST ).
  • Verify the APP1 PID value.
  • Is the APP1 PID value 5 V or B+?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between APP sensor terminal B and PCM terminal 2BN.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has a short to power supply.

Go to Step 9.
No Go to the next step.
8 INSPECT APP SENSOR No. 1 GROUND CIRCUIT FOR OPEN CIRCUIT
  • Verify that the APP sensor connector is disconnected.
  • Switch the ignition off.
  • Disconnect the PCM connector.
  • Inspect for continuity between APP sensor terminal C (wiring harness-side) and PCM terminal 2BH (wiring harness-side).
  • Is there continuity?
 Yes Replace the accelerator pedal, then go to the next step.
(See ACCELERATOR PEDAL REMOVAL/INSTALLATION [VIN M] ).
No Refer to the wiring diagram and verify whether or not there is a common connector between APP sensor terminal C and PCM terminal 2BH.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to the next step.
9 VERIFY DTC TROUBLESHOOTING COMPLETED
  • Always reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC ).
  • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST ).
  • Is the same Pending DTC present?
 Yes Repeat the inspection from Step 1.
  • If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [VIN M] ).
Go to the next step.
No Go to the next step.
10 VERIFY AFTER REPAIR PROCEDURE Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No DTC troubleshooting completed.
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