STEP 1. Using the oscilloscope, check the camshaft position sensor.
STEP 2. Measure the sensor supply voltage at camshaft position sensor connector.
(1) Disconnect the camshaft position sensor connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal CPI line and ground.- Voltage should be between 4.9 and 5.1 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 5. Go to Step 3.
STEP 3. Measure the sensor supply voltage at ECM connector by using power plant ECU check harness special tool MB992110.
(1) Disconnect the all ECM connectors. Connect the power plant ECU check harness special tool MB992110 between the separated connectors.
(2) Disconnect the camshaft position sensor connector.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal CPI line and ground.- Voltage should be between 4.9 and 5.1 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.9 and 5.1 volts?
Repair or replace the connector(s), or check and repair the harness of open circuit in CPI line between camshaft position sensor connector and ECM connector. Then go to Step 13 . Go to Step 4.
STEP 4. Check of short circuit to ground in CPI line between camshaft position sensor connector and ECM connector.
STEP 5. Measure the power supply voltage at camshaft position sensor connector.
(1) Disconnect the camshaft position sensor connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 5V line and ground.- Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is battery positive voltage (approximately 12 volts) present?
Go to Step 7. Go to Step 6.
STEP 6. Check of short to ground and open circuit in 5V line between camshaft position sensor connector and ECM connector.
STEP 7. Check the continuity at camshaft position sensor connector.
STEP 8. Check of open circuit and harness damage in CPIE line between camshaft position sensor connector and ECM connector.
STEP 9. Check of harness damage in 5V line between ECM connector and camshaft position sensor connector.
STEP 10. Check of harness damage in CPI line between ECM connector and camshaft position sensor connector.
STEP 11. Check the camshaft position sensing portion.
STEP 12. Check the trouble symptoms.
STEP 13. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23 . (2) Check the diagnostic trouble code (DTC).
Is DTC P0340 set?
Retry the troubleshooting. The inspection is complete.