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Home >> Suzuki >> 2006 >> XL-7 Base, 4WD, Standard >> 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 >> DTC Troubleshooting
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DTC Troubleshooting

DTC DIAGNOSTIC 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  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 while opening throttle valve.

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 at each "GRY/RED" wire terminal and "RED/GRN" wire terminal of disconnected connector.
  3. If OK, then with ignition switch turned ON, measure voltage at "GRY/RED" wire terminal of disconnected connector.

Is voltage about 4 - 6 V? 		 Go to Step 4. Open in "GRY/RED" circuit, "GRY/RED" circuit shorted to ground or poor "C51-3-13" terminal connection. If wire and connection are OK, substitute a known-good ECM and recheck.
4  Check TP Sensor 
  1. Check resistance between terminals of TP sensor referring to THROTTLE POSITION (TP) SENSOR ON-VEHICLE INSPECTION .

Are measured values within specifications? 		 "RED/GRN" circuit wire is open/shorted to ground or poor "C51-3-9" terminal connection. If OK, substitute a known-good ECM and recheck. Replace TP sensor.
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