Diagnostic Aids

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

The scan tool cam phase control function increments the cam phaser in 10 percent increments. Each increment equates to 2.5 degrees of cam phasing. A cam phase angle of 15 degrees is achieved by commanding the phaser with the scan tool to 60 percent.
Inspect any engine mechanical work that has been performed recently. Verify that the engine timing has not been altered.
If this DTC is set along with any crankshaft position (CKP) or camshaft position (CMP) sensor DTCs, then both the CKP and CMP sensor DTCs should be diagnosed prior to performing this diagnostic. The PCM uses both inputs to determine the actual camshaft position.
Inspect the following items:
- A loose CMP sensor causing a variance in the sensor signal
- A loose CKP sensor causing a variance in the sensor signal
- Excessive free play in the timing chain and gear assembly
- Debris or contamination interfering with the CMP actuator solenoid valve assembly
- Debris or contamination interfering with the CMP actuator assembly
Engine oil has a major impact upon the camshaft actuation system's responsiveness. Oil temperature, viscosity, and quality can slow and/or inhibit the phaser's ability to reach a desired phase angle.
If an intermittent condition exists, refer to Intermittent Conditions .

DTC P0014

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Connect a scan tool. Start and idle the engine for 2 minutes. Increase engine speed to 1,500 RPM. Command the cam phase solenoid from 0 percent to 90 percent, with a scan tool. Does the Cam Phase Angle Actual remain close to the Cam Phase Angle Desired at all commanded positions?	-	Go to Step 3	Go to Step 4
3	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. 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. Does the DTC fail this ignition?	-	Go to Step 4	Go to Diagnostic Aids
4	Allow the engine to idle. Does the engine run rough or stall?	-	Go to Step 9	Go to Step 5
5	Turn OFF the ignition. Let the vehicle sit for one minute. Observe the engine oil level. Is the engine oil level within operating range?	-	Go to Step 6	Go to Fluid and Lubricant Recommendations
6	Install an oil pressure gage. Refer to Oil Pressure Diagnosis and Testing . Start the engine. Increase the engine RPM to 1,400 RPM. Observe the engine oil pressure. Does the oil pressure gage indicate engine oil pressure less than the specified value?	193 kPa (28 psi)	Go to Oil Pressure Diagnosis and Testing	Go to Step 7
7	Increase engine RPM to 1,500 RPM. Command the cam phase solenoid from 0 percent to 90 percent with a scan tool. Does the Cam Phase Angle Actual increment at all?	-	Go to Step 8	Go to Step 10
8	Turn OFF the ignition. Disconnect the camshaft position (CMP) actuator solenoid connector. Measure the resistance of the CMP actuator solenoid valve assembly with a DMM. Refer to Circuit Testing . Does the resistance measure within the specified value?	8-12 Ω	Go to Step 13	Go to Step 20
9	Turn OFF the ignition. Disconnect the CMP actuator solenoid connector. Probe the CMP actuator solenoid high control circuit with a test lamp connected to good ground. Refer to Probing Electrical Connectors . CAUTION: Avoid contact with moving parts and hot surfaces while working around a running engine in order to prevent physical injury. Start the engine. Command the cam phase solenoid between 0 percent and 50 percent with a scan tool. Does the test lamp turn ON and OFF?	-	Go to Step 10	Go to Step 15
10	Turn OFF the ignition. Remove the CMP solenoid valve assembly from the engine block. Refer to Camshaft Position Actuator Solenoid Valve Replacement . Inspect the CMP actuator solenoid valve assembly for the following: Torn screens Debris on the screens Debris clogging the oil ports Missing screens Oil seepage at the solenoid connector pins Did you find a condition?	-	Go to Step 20	Go to Step 11
11	Connect a jumper wire between the CMP actuator low reference circuit at the solenoid and a good ground. Connect a fused jumper wire between B+ and the CMP actuator high control circuit at the solenoid and battery voltage. Refer to Using Fused Jumper Wires . Momentarily touch the fused jumper to B+. Observe the spool valve inside the CMP actuator. Does the spool valve move from fully closed to fully opened?	-	Go to Step 12	Go to Step 18
12	Inspect for the following conditions: Excessive timing chain play-Refer to Timing Chain and Sprockets Replacement . Excessive camshaft end play Excessive crankshaft end play Proper installation of the CMP actuator assembly-Refer to Timing Chain and Sprockets Replacement . Did you find and correct the condition?	-	Go to Step 22	Go to Step 13
13	Disconnect the powertrain control module (PCM). Refer to Control Module References for replacement, setup, and programming. Measure the resistance on the CMP actuator high control circuit with a DMM. Refer to Circuit Testing . Does the resistance measure more than the specified value?	5 Ω	Go to Step 16	Go to Step 14
14	Measure the resistance on the low reference circuit with a DMM. Refer to Circuit Testing . Does the resistance measure more than the specified value?	5 Ω	Go to Step 17	Go to Camshaft Position Actuator Diagnosis
15	Test the CMP actuator high control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 22	Go to Step 19
16	Repair the high resistance on the CMP actuator high control circuit. Refer to Wiring Repairs . Did you complete the repair?	-	Go to Step 22	-
17	Repair the high resistance on the CMP actuator low reference circuit. Refer to Wiring Repairs . Did you complete the repair?	-	Go to Step 22	-
18	Test for an intermittent and for a poor connection at the CMP actuator solenoid valve assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 22	Go to Step 20
19	Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 22	Go to Step 21
20	Replace the CMP actuator solenoid. Refer to Camshaft Position Actuator Solenoid Valve Replacement . Did you complete the replacement?	-	Go to Step 22	-
21	Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 22	-
22	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. 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 23
23	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle	System OK