GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2007 🢒 Ascender - 2WD 🢒 Engine 🢒 Engine Controls and Fuel - 4.2L 🢒 DTC P0017

Circuit Description

The powertrain control module (PCM) uses the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor information to monitor the correlation between the crankshaft and camshaft positions. If the deviation between the crankshaft and CMP exceeds a calibrated amount, DTC P0017 will set.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0017 Crankshaft Position (CKP) Exhaust - Camshaft Position (CMP) Correlation

Conditions for Running the DTC
    • The engine is running.
    • The CMP actuator is commanded to zero for 16 seconds.
    • DTC P0017 runs continuously when the above conditions are met.

Conditions for Setting the DTC
    • The deviation between the crankshaft and the camshaft positions exceeds a calibrated amount.
    • The above condition is met for 4 seconds.

Action Taken When the DTC Sets
    • The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
    • The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC
    • The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
    • A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
    • A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
    • Clear the MIL and the DTC with a scan tool.

Diagnostic Aids

Important: Scan tool control of the CMP actuator solenoid is inhibited when DTC P0017 sets.

The following conditions may cause this DTC to set:

    • An improperly torqued crankshaft balancer
    • A mis-built or mis-timed engine
    • A loose or missing crankshaft balancer bolt
    • Excessive crankshaft endplay
    • The CMP actuator solenoid stuck open
    • The CMP actuator stuck in a position other than 0 degrees

Test Description

The number below refers to the step number on the diagnostic table.

  1. If this DTC sets, there is a problem with the CMP actuator solenoid high control circuit shorted to voltage or the solenoid stuck open.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Start the engine.
  2. Clear the DTCs with a scan tool.

Does the scan tool indicate that DTC P0013 or P0014 failed this ignition?

Go to DTC P0013 or DTC P0014

Go to Step 3

3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 4

Go to Diagnostic Aids

4
  1. Turn OFF the ignition.
  2. Inspect the crankshaft balancer bolt for the proper torque. Refer to Fastener Tightening Specifications and Crankshaft Balancer Replacement .

Was the crankshaft balancer bolt at the proper torque?

Go to Step 5

Go to Crankshaft Balancer Replacement

5
  1. Disconnect the camshaft position (CMP) actuator solenoid.
  2. Remove the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement .
  3. Connect a fused jumper wire between battery voltage and the CMP actuator high control circuit at the solenoid. Refer to Using Fused Jumper Wires .
  4. Connect a jumper wire between the low reference circuit of the CMP actuator solenoid and a good ground. Refer to Using Connector Test Adapters .

Does the pintle inside the CMP actuator solenoid move?

Go to Step 6

Go to Step 8

6

Inspect the CMP actuator for binding or being stuck. Refer to Camshaft Position Actuator Diagnosis .

Did you find and correct the condition?

Go to Step 9

Go to Step 7

7

Inspect the engine for correct valve timing. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement .

Did you find and correct the condition?

Go to Step 9

Go to Diagnostic Aids

8

Replace the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement .

Did you complete the replacement?

Go to Step 9

--

9
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?

Go to Step 2

Go to Step 10

10

Observe the Capture Info with a scan tool.

Have any other DTCs not been diagnosed?

Go to Diagnostic Trouble Code (DTC) List - Vehicle

System OK