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Home >> Suzuki >> 2007 >> Aerio Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0122: Throttle Position Sensor Circuit Low Input >> DTC Troubleshooting
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DTC Troubleshooting

NOTE: When this DTC and P1700 are stored together, also clear DTC stored in TCM after completion of repair.
DIAGNOSIS PROCEDURE

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  Check TP sensor and its circuit 
  1. Connect scan tool to DLC with ignition switch turned OFF and then turn ON ignition switch.
  2. Check throttle valve opening percentage displayed on scan tool.
  3. Check throttle valve opening percentage displayed on scan tool while opening throttle valve from idle position to full open position.

Is it displayed 0%? 		 Go to Step 3. Intermittent trouble. Check for intermittent referring to INTERMITTENT AND POOR CONNECTION INSPECTION .
3  Check wire harness 
  1. Disconnect connector from TP sensor with ignition switch turned OFF.
  2. Check for proper connection to TP sensor connector at "GRY/RED", "GRY/BLU" and "ORN" wire terminals.
  3. If OK, then with ignition switch turned ON, check voltage of TP sensor connector between each terminal of "GRY/RED" wire, "GRY/BLU" wire and engine ground.
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Is voltage about 4 - 6 V at each terminal? 		 Go to Step 5. Go to Step 4.
4  Check ECM voltage 
  1. Check for proper connection of ECM connector at "C46-23" and "C46-22" terminals.
  2. If OK, disconnect connector from MAP sensor.
  3. Turn ON ignition switch, check voltage of ECM connector between each terminal of "C46-23", "C46-22" and body ground.

Is voltage about 4 - 6 V at each terminal? 		 Check MAP sensor according to Manifold Absolute Pressure (MAP) Sensor Inspection  .
If they are OK, go to Step 5.		 Go to Step 5.
5  Check wire circuit 
  1. Disconnect connectors from ECM with ignition switch turn OFF.
  2. Check that there is insulation of TP sensor connector between each terminal of "GRY/RED" wire, "GRY/BLU" wire terminal and body ground.

Is there insulation? 		 Go to Step 6. "GRY/RED" and/or "GRY/BLU" wire shorted to ground circuit.
If wire are OK, substitute a known-good ECM and recheck
6  Check TP sensor 
  1. Check resistance between terminals of TP sensor.

TP sensor resistance 
Between 1 and 3: 4.0 - 6.0 kohm 
Between 1 and 2: 0.1 - 6.5 kohm 
G04589449

 
Are measured values within specifications? 		 Substitute a known-good ECM and recheck. Replace TP sensor.
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