Dodge ZB 2005 Service Manual page 1275

DRIVEABILITY - GAS
P1391-INTERMITTENT LOSS OF CMP OR CKP —
TEST
2 Turn the ignition off.
With the DRBIII
backprobe the (K44) CMP Signal circuit in the CMP harness connector and PCM
harness connector.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Observe the lab scope screen.
Are there any irregular or missing signals?
Yes → Go To 3
→ Go To 6
No
3 Visually inspect the related wire harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Ensure the Crankshaft Position Sensor and the Camshaft Position Sensor are
properly installed and the mounting bolt(s) are torqued to specification.
Refer to any TSB that may apply.
Were any of the above conditions present?
Yes → Repair as necessary
→ Go To 4
No
4 Turn the ignition off.
Remove the Camshaft Position Sensor.
Inspect the Tone Wheel/Pulse Ring for damage, foreign material, or excessive
movement.
Were any problems found?
Yes → Repair or replace the Tone Wheel/Pulse Ring as necessary.
→ Go To 5
No
5 If there are no possible causes remaining, view repair.
Repair
6 Turn the ignition off.
With the DRBIII as a Dual Channel Lab Scope and the Miller special tool #6801,
backprobe the (K24) CKP Signal circuit in the CKP harness connector and PCM
harness connector.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Observe the lab scope screen.
Are there any irregular or missing signals?
Yes → Go To 7
→ Go To 10
No
ACTION
as a Dual Channel Lab Scope and Miller special tool #6801,
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the Camshaft Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Continued
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APPLICABILITY
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