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DTC Troubleshooting

P0340 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:J24B .
2  DTC check 
  1. Check DTC.

Is there DTC(s) other than P0340? 		 Go to applicable DTC (s). Go to Step 3.
3  CMP sensor power supply circuit check 
  1. Turn OFF ignition switch and disconnect connector from CMP sensor.
  2. Check for proper terminal connection to CMP sensor connector.
  3. If connections are OK, turn ignition switch to ON position.
  4. Check that CMP sensor power supply circuit (A1) is battery voltage.

Is it good condition? 		 Go to Step 4. Repair or replace defective wire harness.
4  CMP sensor signal circuit and ground circuit check 
  1. Turn OFF ignition switch and disconnect connectors from ECM.
  2. Check for proper terminal connection to ECM connectors.
  3. If connections are OK, check that CMP sensor signal circuit (A2) and ground circuit (A3) are as follows.
    • Wiring harness resistance of each CMP sensor signal circuit and ground circuit is less than 3 Ω.
    • Insulation resistance between CMP sensor signal circuit and vehicle body ground is infinity.
    • Insulation resistance of wire harness is infinity between CMP sensor signal circuit terminal and each terminal at CMP sensor connector.
    • Insulation resistance of wire harness is infinity between CMP sensor ground circuit terminal and each terminal at CMP sensor connector.
    • Circuit voltage of each CMP sensor signal circuit and ground circuit is 0 - 1 V with ignition switch in ON position.

Are they in good condition? 		 Go to Step 5. Repair or replace defective wire harness.
5  CMP sensor and signal rotor check 
  1. Check CMP sensor and signal rotor, see CMP (CAMSHAFT POSITION) SENSOR INSPECTION .

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