2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1281
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0335
- Crankshaft Position Sensor Circuit
DTC P0336
- Crankshaft Position Sensor Performance
DTC P0338
- Crankshaft Position Sensor Circuit High Duty Cycle
Diagnostic Fault Information
Circuit/System Description
The crankshaft position sensor is located on the rear of bank 1 of the engine block. The crankshaft position sensor is a hall effect switch that works
in conjunction with a 58X reluctor wheel that is attached to the crankshaft. Each tooth on the reluctor wheel is spaced 6 degrees apart with one span
having a 12 degree space. The engine control module (ECM) uses the 12 degree space to determine top dead center (TDC) for cylinders 1 and 4.
The ECM determines when cylinder 1 is on the compression stroke by monitoring the crankshaft position sensor and the camshaft position sensors.
The ECM can synchronize the ignition timing, fuel injector timing, and spark knock control based on the crankshaft position sensor and the
camshaft position sensor inputs.
Conditions for Running the DTC
* The engine is cranking or operating.
* The ECM has detected greater than 12 camshaft revolutions.
* The DTC P0335 and P0336 run continuously once the above conditions are met for greater than 5 seconds.
* The DTC P0338 runs once each engine revolution once the above conditions are met for greater than 2 seconds.
Conditions for Setting the DTC
P0335
* The ECM does not detect a signal from the crankshaft position sensor.
OR
* The ECM detects a crankshaft position signal with out reference pulse for greater than 3 revolutions, 6 revolutions for LLT.
* Either condition exists for greater than 1 second or a cumulative of 10 seconds.
P0336
* The ECM re-syncs the engine position 6 or more times during an ignition cycle.
* The ECM re-syncs the engine position 2,600 or more times during an ignition cycle, for LLT.
OR
* The ECM detects 28 or more interruptions in the engine speed signal during an ignition cycle.
* Either condition exists for greater than 1 second or a cumulative of 10 seconds.
P0338
* The ECM detects a difference of greater than 8 teeth between reference gap position pulses.
* The ECM detects a difference of greater than 250 teeth between reference gap position pulses, for LLT.
* The condition exists for greater than 1 second or a cumulative of 10 seconds.
Action Taken When the DTC Sets
DTCs P0335, P0336, and P0338 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0335, P0336, and P0338 are Type A DTCs.
