TEST ACTION APPLICABILITY
2 Turn the ignition off.
With the DRBIIIt lab scope probe and the Miller special tool #6801, back probe the
(K44) Camshaft Position (CMP) Sensor Signal circuit in the CMP 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.
Ignition on, engine not running.
Wiggle the related wire harness and lightly tap on the Cam Position Sensor.
Observe the lab scope screen.
Look for any pulses generated by the CMP Sensor.
Start the engine.
Allow the engine to idle.
Observe the lab scope screen.
Did the CMP Sensor generate any erratic pulses?
All
Yes → Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 3
3 Turn the ignition off.
With the DRBIIIt lab scope probe and the Miller special tool #6801, backprobe the
(K24) CKP Signal circuit in the CKP 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.
Ignition on, engine not running.
Wiggle the related wire harness and lightly tap on the Crank Position Sensor.
Observe the lab scope screen.
Look for any pulses generated by the CKP Sensor.
Start the engine.
Allow the engine to idle.
Observe the lab scope screen.
Did the CKP Sensor generate any pulses?
All
Yes → Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Test Complete.
4 Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K7) 5 Volt Supply circuit in the CKP Sensor harness
connector.
Is the voltage between 4.5 and 5.5 volts?
All
Yes → Go To 5
No → Go To 13
5 Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (24) CKP Signal circuit in the CKP Sensor harness
connector.
Is the voltage between 4.5 and 5.0 volts?
All
Yes → Go To 6
No → Go To 8
136
DRIVEABILITY - NGC
P0335-CRANKSHAFT POSITION SENSOR CIRCUIT — Continued
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