[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P0340 INLET CAMSHAFT POSITION SENSOR SYSTEM
Code No. P0340: Inlet Camshaft Position Sensor System
 
 
 
 
OPERATION
  • Power is supplied to the inlet camshaft position sensor from the engine-ECU connector terminal 5V and is earthed to the engine-ECU connector terminal DGND from the inlet camshaft position sensor.
  • A power voltage of 5 V is applied to the inlet camshaft position sensor connector signal terminal from the engine-ECU connector terminal CPIN.
 
 
FUNCTION
  • The inlet camshaft position sensor detects the position of the inlet camshaft and inputs the pulse signal to the engine-ECU.
  • In response to the inlet camshaft position sensor signal and the crank angle sensor signal, the engine-ECU detects the compression top dead centre of the No. 1 cylinder.
  • Also, in response to the inlet camshaft position sensor signal, the engine-ECU controls variable valve timing (V.V.T.).
 
 
TROUBLE JUDGEMENT
Check Condition
  • During engine running.
Judgement Criteria
  • A pulse signal from the crank angle sensor continues 264 times and engine speed is less than 440 r/min.
  • An inlet camshaft position sensor signal pattern is not normal.
Check Condition
  • During engine running.
Judgement Criterion
  • An inlet camshaft position sensor signal pattern is not normal for 2 seconds and engine speed is more than 440 r/min.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Engine runs in learned pattern until engine stops.
  • Does not control variable valve timing (V.V.T.).
 
 
PROBABLE CAUSES
  • Failed inlet camshaft position sensor
  • Open/short circuit or harness damage in inlet camshaft position sensor circuit or loose connector contact
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. Perform voltage measurement at inlet camshaft position sensor connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal engine-ECU CPIN line and body earth.
OK: 4.9 - 5.1 V
Is the check result normal?
Go to Step 4.
Go to Step 2.
 
STEP 2. Check of open circuit, and short circuit in CPIN line between inlet camshaft position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. M.U.T.-IIISE diagnosis code
  • Reconfirmation of diagnosis code.
Is the diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
 
STEP 4. Perform voltage measurement at inlet camshaft position sensor connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal engine-ECU 5V line and body earth.
OK: 4.9 - 5.1 V
Is the check result normal?
Go to Step 6.
Go to Step 5.
 
STEP 5. Check of open circuit, and short circuit in 5V line between inlet camshaft position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 6. Perform resistance measurement at inlet camshaft position sensor connector.
  • Disconnect connector, and measure at harness side.
  • Resistance between terminal engine-ECU DGND line and body earth.
OK: Continuity (2 Ω or less)
Is the check result normal?
Go to Step 8.
Go to Step 7.
 
STEP 7. Check of open circuit, and damage in DGND line between inlet camshaft position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 8. Perform output wave pattern measurement at inlet camshaft position sensor connector (Using an oscilloscope).
  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Engine: Idling
  • Transmission: Neutral <M/T>, P range <CVT>
  • Voltage between terminal engine-ECU CPIN line and body earth.
OK: Waveforms should be displayed on inspection procedure using an oscilloscope (Refer to ), its maximum value should be 4.8 V or more, and its minimum value should be 0.6 V or less. There must be no noise in the output wave pattern.
Is the check result normal?
Go to Step 3.
Go to Step 9.
 
STEP 9. Check of damage in 5V line between inlet camshaft position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 10.
Repair the connector(s) or wiring harness.
 
STEP 10. Check of damage in CPIN line between inlet camshaft position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 11.
Repair the connector(s) or wiring harness.
 
STEP 11. Check inlet camshaft sensing ring.
Is the check result normal?
Go to Step 12.
Replace the inlet camshaft.
 
STEP 12. M.U.T.-IIISE diagnosis code
  • Reconfirmation of diagnosis code.
Is the diagnosis code set?
Replace the inlet camshaft position sensor.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).