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Home >> Suzuki >> 2009 >> Grand Vitara Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine General Information And Diagnosis (N32A)) >> Diagnostic Information and Procedures >> DTC P2122: Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input; P2123: Throttle/Pedal Position Sensor/Switch "D" Circuit High Input >> DTC Troubleshooting
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DTC Troubleshooting

WARNING: This page is about a different variant/trim than selected.
DTC TROUBLESHOOTING CHART

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK  .
2  Accelerator pedal assembly (incorporated with APP sensor) mounting check 
  1. Check that accelerator pedal assembly (incorporated with APP sensor) has been mounted to vehicle body properly (no pinched floor carpet, etc.).

Is it in good condition? 		 Go to Step 3. Reinstall accelerator pedal assembly (incorporated with APP sensor) properly.
3  APP sensor (main) power supply circuit check 
  1. With ignition switch turned OFF, disconnect connector from accelerator pedal assembly (incorporated with APP sensor).
  2. Check for proper terminal connection to accelerator pedal assembly (incorporated with APP sensor) connector.
  3. If connections are OK, turn ignition switch to ON position.
  4. Check that voltage between APP sensor (main) power supply circuit (A1) and vehicle body ground is 5 V.

Is it in good condition? 		 Go to Step 4. Go to Step 5.
4  APP sensor (main) ground circuit check 
  1. Check that voltage between APP sensor (main) power supply circuit (A1) and ground circuit (A3) is 5 V.

Is it in good condition? 		 Go to Step 6. Repair or replace defective wire harness. If this DTC is detected again, go to Step 8.
5  APP sensor (main) power supply circuit check 
  1. With ignition switch turned OFF, disconnect connectors from ECM.
  2. Check for proper terminal connection to ECM connectors.
  3. If connections are OK, check that APP sensor power supply circuit (A1) is as follows.
    • Wiring harness resistance of APP sensor (main) power supply circuit is less than 3 Ω.
    • Insulation resistance of APP sensor (main) power supply circuit is infinity between accelerator pedal assembly (incorporated with APP sensor) connector and vehicle body ground.
    • Insulation resistance of wire harness is infinity between APP sensor (main) power supply terminal and other terminal at APP sensor connector.
    • Circuit voltage of APP sensor (main) power supply circuit is 0 - 1 V with ignition switch turned ON.

Is it in good condition? 		 Go to Step 8. Repair or replace defective wire harness.
6  APP sensor (main) signal circuit check 
  1. With ignition switch turned OFF, disconnect connectors from ECM.
  2. Check for proper terminal connection to ECM connectors.
  3. If connections are OK, check that APP sensor signal circuit (A2) is as follows.
    • Wiring harness resistance of APP sensor (main) signal circuit is less than 3 Ω.
    • Insulation resistance of APP sensor (main) signal circuit is infinity between accelerator pedal assembly (incorporated with APP sensor) connector and vehicle body ground.
    • Insulation resistance of wire harness is infinity between APP sensor (main) signal terminal and other terminal at accelerator pedal assembly (incorporated with APP sensor) connector.
    • Circuit voltage of APP sensor (main) signal circuit is 0 - 1 V with ignition switch turned ON.

Is it in good condition? 		 Go to Step 7. Repair or replace defective wire harness.
7  APP sensor check 
  1. Check APP sensor.

Is it in good condition? 		 Go to Step 8. Replace accelerator pedal assembly (incorporated with APP sensor).
8  Troubleshooting of other DTC(s) detected at the same time 
Is other DTC(s) detected together? 		 Go to troubleshooting for applicable DTC. Substitute a known-good ECM and recheck.
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