[Previous][Next]
DTC P0365: Exhaust Camshaft Position Sensor Circuit
 
 
 
 
CIRCUIT OPERATION
  • The exhaust camshaft position sensor power is supplied from the ECM terminal 5V.
  • Terminal DGND line of the exhaust camshaft position sensor is grounded with ECM terminal DGND.
  • A 5-volt voltage is applied on the exhaust camshaft position sensor output terminal from the ECM terminal CPEX. The exhaust camshaft position sensor generates a pulse signal when the output terminal is opened and grounded.
 
 
TECHNICAL DESCRIPTION
  • The exhaust camshaft position sensor detects the position of the exhaust camshaft and inputs the pulse signal to the ECM.
  • In response to the exhaust camshaft position sensor signal, the ECM controls variable valve timing (V.V.T.).
 
 
DESCRIPTIONS OF MONITOR METHODS
  • Exhaust camshaft position sensor signal does not change.
  • Exhaust camshaft position sensor signal is not normal pattern.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS <Circuit continuity>
Logic Flow Chart
Check Condition
  • Engine is being cranked.
or
  • Engine speed is more than 500 r/min excluding during cranking.
Judgment Criterion
  • Exhaust camshaft position sensor output voltage does not change (no pulse signal is input) for 2 seconds.
 
 
DTC SET CONDITIONS <Range/Performance problem - alignment>
Logic Flow Chart
Check Condition
  • Engine is being cranked.
or
  • Engine speed is more than 500 r/min excluding during cranking.
Judgment Criterion
  • Normal signal pattern is not inputted from the crankshaft position sensor signal and exhaust camshaft position sensor signal for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Does not control variable valve timing (V.V.T.).
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
  • Exhaust camshaft position sensor failed.
  • Open or shorted exhaust camshaft position sensor circuit, harness damage or connector damage.
  • Exhaust camshaft failed.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tool:
  • MB991709: Test Harness
STEP 1. Using the oscilloscope, check the exhaust camshaft position sensor.
  • Engine: Idling
  • Selector lever: P range
  • Voltage between terminal CPEX and ground.
OK: Waveforms should be displayed on inspection procedure using an oscilloscope (Refer to ).
Is the wave pattern normal?
Go to Step 11.
Go to Step 2.
 
STEP 2. Measure the sensor supply voltage at exhaust camshaft position sensor connector.
(1) Disconnect the exhaust 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 CPEX 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 4.
Go to Step 3.
 
STEP 3. Check of short to ground and open circuit in CPEX line between exhaust camshaft position sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 11.
Repair the connector(s) or wiring harness. Then go to Step 12.
 
STEP 4. Measure the power supply voltage at exhaust camshaft position sensor connector.
(1) Disconnect the exhaust 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 6.
Go to Step 5.
 
STEP 5. Check of short to ground and open circuit in 5V line between exhaust camshaft position sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 11.
Repair the connector(s) or wiring harness. Then go to Step 12.
 
STEP 6. Check the continuity at exhaust camshaft position sensor connector.
(1) Disconnect the exhaust camshaft position sensor connector and measure at the harness side.
(2) Check for the continuity between terminal DGND line and ground.
  • Continuity (2 ohms or less).
Does continuity exist?
Go to Step 8.
Go to Step 7.
 
STEP 7. Check of open circuit and harness damage in DGND line between exhaust camshaft position sensor connector and ECM connector.
Is the harness wire in good condition?
Go to Step 11.
Repair the connector(s) or wiring harness. Then go to Step 12.
 
STEP 8. Check of harness damage in 5V line between ECM connector and exhaust camshaft position sensor connector.
Is the harness wire in good condition?
Go to Step 9.
Repair the connector(s) or wiring harness. Then go to Step 12.
 
STEP 9. Check of harness damage in CPEX line between ECM connector and exhaust camshaft position sensor connector.
Is the harness wire in good condition?
Go to Step 10.
Repair the connector(s) or wiring harness. Then go to Step 12.
 
STEP 10. Check the exhaust camshaft position sensing portion.
Is the exhaust camshaft position sensing portion in good condition?
Replace the exhaust camshaft position sensor. Then go to Step 12.
Replace the V.V.T. sprocket assembly (exhaust). Then go to Step 12.
 
STEP 11. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0365 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 12.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
 
STEP 12. 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 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0365 set?
Retry the troubleshooting.
The inspection is complete.