DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

Page: 82 / 284

Symptom:
P0340-CMP/CKP POSITION SENSOR CIRCUIT - CMP/CKP SYNC
FAILURE
When Monitored and Set Condition:
P0340-CMP/CKP POSITION SENSOR CIRCUIT - CMP/CKP SYNC FAILURE
When Monitored: With the engine running.
Set Condition: The ECM determines that the camshaft position sensor signal frequency
is not plausible with the crankshaft position sensor signal frequency.
POSSIBLE CAUSES
CHECK CAMSHAFT POSITION SENSOR SIGNAL
CHECK CRANKSHAFT POSITION SENSOR SIGNAL
CHECKING CKP SENSOR FOR DAMAGE
CHECKING CMP SENSOR FOR DAMAGE
ENGINE CONTROL MODULE
GEAR ALIGNMENT
INTERMITTENT CONDITION
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII
t
, erase the ECM DTCs.
Attempt to start the engine.
With the DRBIII
t
, read the ECM DTCs.
Does the DRB III display this DTC?
All
Yes
→
Go To 3
No
→
Go To 2
2 Turn the ignition on.
With the DRBIII
t
, erase the ECM DTCs.
Test drive the vehicle.
With the DRBIII
t
, read the ECM DTCs.
Does the DRB III display this DTC?
All
Yes
→
Go To 3
No
→
Go To 8
3 Turn the ignition off.
Remove the CMP Sensor.
Inspect the camshaft Position Sensor for conditions such as loose mounting screws,
damage or debris, also check the camshaft for cracked teeth.
Is there any evidence of these conditions? All
Yes
→
Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To 4
74
DRIVEABILITY - DIESEL
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