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Home >> Suzuki >> 2007 >> SX4 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0340: Camshaft Position Sensor "A" Circuit >> DTC Troubleshooting
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DTC Troubleshooting

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  CMP sensor and connector for proper installation check 
Is CMP sensor installed properly and connector connected securely? 		 Go to Step 3. Correct.
3  CMP sensor power supply voltage check 
  1. Disconnect connector from CMP sensor with ignition switch turned OFF.
  2. Check for proper terminal connection to CMP sensor and ECM connectors.
  3. If connections are OK, turn ignition switch to ON position.
  4. Check that CMP sensor power supply voltage is battery voltage between CMP sensor connector and vehicle body ground.

Is it in good condition? 		 Go to Step 4. CMP sensor power supply circuit is open or shorted to ground.
4  Wire harness check 
  1. Turn ignition switch OFF position.
  2. Disconnect connector from ECM.
  3. Check that CMP sensor circuit is as follows.
    • Wiring harness resistance of CMP sensor signal circuit is less than 3 Ω.
    • Insulation resistance of each CMP sensor signal and ground circuit between CMP sensor connector and vehicle body ground is infinity.
    • Insulation resistance of wire harness is infinity between CMP sensor signal terminal and each other terminal at CMP sensor connector.
    • Circuit voltage of each CMP sensor signal circuit and ground circuit is 0 - 1 V with ignition switch turned ON.

Are they in good condition? 		 Go to Step 5. Repair or replace defective wire harness.
5  CMP sensor signal circuit voltage check 
  1. Check that CMP sensor signal circuit voltage is 5 V between CMP sensor connector and vehicle body ground.

Is it in good condition? 		 Go to Step 6 Substitute a known-good ECM and recheck.
6  CMP sensor check 
  1. Check CMP sensor and sensor rotor referring to CAMSHAFT POSITION (CMP) SENSOR INSPECTION .

Are they in good condition? 		 Substitute a known-good ECM and recheck. Replace CMP sensor and/or sensor rotor.
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