Circuit Description
This DTC identifies that the cam and the crank relationship is skewed and that the cam pulses are read in a haphazard ratio to the crank pulses. This fault is not a solid or consistent failure. The fault may not act the same way twice. This DTC is a type B DTC.
Conditions for Setting the DTC
The following conditions will set the DTC:
| • | The engine running |
| • | The cam sensor reference pulse is not detected at the correct interval |
Action Taken When the DTC Sets
The VCM will turn ON the MIL (Malfunction Indicator Lamp) after 2 consecutive test failures.
Conditions for Clearing the MIL/DTC
The VCM turns OFF the MIL after 3 consecutive driving trips without a fault condition present. A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles (the coolant temperature has risen 22°C (40°F) from the start-up coolant temperature and the engine coolant temperature exceeds 71°C (160°F) during that same ignition cycle) or the scan tool clearing feature has been used.
Diagnostic Aids
A poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation may cause an intermittent.
Throroughly check any circuitry that is suspected of causing the intermittent complaint. Check for the following conditions:
| • | Backed out terminals |
| • | Improper mating |
| • | Broken locks |
| • | Improperly formed or damaged terminals |
| • | Poor terminal to wiring connections or |
| • | Physical damage to the wiring harness |
Refer to Intermittent Conditions .
Test Description
The step number below refers to the step number in the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Important: Before clearing the DTCs, use the scan tool to record the Freeze Frame and the Failure Records for reference. This data will be lost when the Clear Info function is used. Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||
Check for an intermittent short to the voltage or EMI (electromagnetic interference) such as the wires which run along side the spark plug wires or the high power transmitters (like the mobile radios operating in the vicinity) on the Camshaft Position sensor wires. Was a problem found? | -- | |||
3 | Repair short to voltage or EMI as necessary. Refer to Wiring Repairs in Engine Electrical. Is the repair complete? | -- | -- | |
4 |
Does the scan tool indicate that this diagnostic ran and passed? | -- | ||
5 | Using the scan tool, select the Capture Info and the Review Info. Are any DTCs displayed that have not been diagnosed? | -- | Go to The Applicable DTC Table | System OK |
