Operation CHARM: Car repair manuals for everyone.

P0340

Test 1:




Tests 2 - 4:




Tests 5 - 9:




Tests 10 - 14:




Tests 15 - 16:




SYMPTOM
P0340-NO CAM SIGNAL AT PCM

WHEN MONITORED
Engine cranking/running.

SET CONDITION
At least 5 seconds have elapsed with Crankshaft Position Sensor signals present but no Camshaft Position Sensor signal.

POSSIBLE CAUSES
- Crank position sensor signal
- Checking intermittent CMP signal with lab scope
- 5 Volt supply circuit shorted to ground
- 5 Volt supply circuit open
- 5 Volt supply circuit shorted to voltage
- CMP sensor signal circuit shorted ground
- CMP sensor signal circuit open
- CMP sensor signal circuit shorted to voltage
- CMP sensor signal shorted to 5 volt supply circuit
- CAM position sensor ground circuit open
- PCM - 5 Volt supply
- PCM - CMP sensor signal
- Camshaft position sensor