Diagnostic Instructions
DTC Descriptor
DTC P0016: Crankshaft Position - Camshaft Position Correlation
Bank 1 Sensor A
Circuit/System Description
The engine control module (ECM) uses the crankshaft position (CKP) sensor pulses
to monitor the crankshaft position. The crankshaft reluctor wheel consists of a 60-tooth
pattern with 2 teeth missing for the reference gap. Each tooth is evenly spaced
6 degrees apart, except for the reference gap. The camshaft sensor (CMP) reluctor
wheel has 4 teeth, 2 narrow and 2 wide. The 4 trailing
edges of each tooth are evenly spaced at 90 degrees apart around the circumference
of the camshaft sprocket. With the engine running the ECM expects the camshaft signal
pulses to occur 36 crankshaft degrees before top dead centre (BTDC) for cylinder
number 1 and every 180 degrees thereafter.
Conditions for Running the DTC
• | DTC P0335, P0336, P0340, P0341, P0641 or P0651 are not set. |
• | The engine speed is less than 2000 RPM . |
• | The DTC runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The ECM detects that the CMP sensor pulses occur less than or more than 10 crankshaft
degrees outside of the normal position for 25 out of 35 engine cycles.
Action Taken when the DTC Sets
DTC P0016 is a type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0016 is a type B DTC.
Diagnostic Aids
• | This test procedure requires that the vehicle battery has passed a load
test and is completely charged. |
• | When disconnecting harness connection or removing fuses and relays from
a fuse block always inspect the electrical terminals for corrosion and for mating
terminal tightness. |
Reference Information
Schematic Reference
Engine Controls Schematics
.
Connector End View Reference
Component Connector End Views
Electrical Information Reference
Scan Tool Reference
Control Module References
Circuit/System Verification
Important: If the vehicle passes the Circuit/System
Verification Test, then operate the vehicle within the Conditions For Running The
DTC. You may also operate the vehicle within the conditions that are captured in the
Freeze Frame/Failure Records Data List. The other option is to refer to
Testing for Intermittent Conditions and Poor Connections
.
- Operate the vehicle at idle and at various engine speeds and load ranges
while observing the CMP Variance compared to the desired CMP and CKP angle parameters
with a scan tool.
- Both parameters should remain less than or equal to 1 degree
at all engine speeds. The CMP variance should remain less than or equal to 1 degree.
⇒ | If the CMP Variance remains more than 1 degree for more than 3 seconds,
continue with the Circuit/System Testing. |
Circuit/System Testing
- Inspect the engine front cover area or review the service history of the
vehicle for any recent repairs involving the timing chain, camshaft, crankshaft or
sprockets.
- Remove the engine front cover. Refer to
Engine Front Cover Replacement
. Inspect the timing chain, tensioner and
sprockets for wear or damage. Refer to
Camshaft Timing Chain and Sprocket Cleaning and Inspection
.
⇒ | If the all the components test normal, replace the appropriate sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after
completing the diagnostic procedure.
Camshaft Timing Chain and Sprocket Replacement
.