2012 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

P0010-BANK 1 CAMSHAFT 1 POSITION ACTUATOR CIRCUIT OPEN

P0010-BANK 1 CAMSHAFT 1 POSITION ACTUATOR CIRCUIT OPEN

For a complete wiring diagram, refer to the Wiring Information.





Theory of Operation

NOTE:

The CMP sensor is a dual read sensor reading both camshafts of it's correlating bank.


3.6L VVT Component Locations

CALLOUT

DESCRIPTION

1

VVT Actuator Bank 1 Position 2

2

VVT Actuator Bank 1 Position 1

3

VVT Actuator Bank 2 Position 1

4

VVT Actuator Bank 2 Position 2

5

Camshaft Position Sensor 2 / 1 Signal

6

Bank 2 Camshaft Sensor

7

Camshaft Position Sensor 2 / 2 Signal

8

Camshaft Position Sensor 1 / 2 Signal

9

Bank 1 Camshaft Sensor

10

Camshaft Position Sensor 1 / 1 Signal

Variable Valve Timing (VVT) allows the Powertrain Control Module (PCM) to monitor and adjust the position of each Camshaft, based on desired torque levels and engine operating conditions. The PCM controls solenoid operated control valves, one for each Camshaft, that are used to direct oil pressure to hydraulic actuators mounted between each Camshaft and its driving sprocket. The oil pressure alters the angular position or phasing of each Camshaft relative to Crankshaft rotation. A sensor is used to monitor the position of each Camshaft.



Possible Causes

VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT SHORTED TO GROUND
VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT SHORTED TO VOLTAGE
VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT OPEN OR HIGH RESISTANCE
VVT INTAKE SOLENOID 1/1
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).


1. DTC IS ACTIVE

1. Ignition on, engine not running.
2. With the scan tool, record the related Freeze Fame Data and clear the DTCs in the Powertrain Control Module (PCM).
3. Start the engine and allow it to reach normal operating temperature. Hold engine speed greater than 1,000 RPM for at least one minute. The DTC will not be set unless cam phasing becomes active, which may not occur if speed never leaves idle.

WARNING:

When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result possible serious or fatal injury.

4. With the scan tool, select View DTCs.


Is the DTC Active or Pending at this time?

Yes


No


2. CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT FOR A SHORT TO VOLTAGE

1. Turn the ignition off.
2. Disconnect the VVT Intake Solenoid 1/1 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (K76) VVT Intake Solenoid 1/1 Driver circuit at the VVT Intake Solenoid 1/1 harness connector.


NOTE: The VVT Solenoid Driver circuit is a PWM circuit which will read approximately 8.8 volts with ignition on and the solenoid disconnected.


Is the voltage equal to battery voltage?

Yes


No


3. CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT FOR A SHORT TO GROUND

1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance between ground and the (K76) VVT Intake Solenoid 1/1 Driver circuit at the VVT Intake Solenoid 1/1 harness connector.


Is the resistance above 10k Ohms?

Yes


No


4. CHECK THE (K76) VVT INTAKE SOLENOID 1/1 DRIVER CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance of the (K76) VVT Intake Solenoid 1/1 Driver circuit between the VVT Intake Solenoid 1/1 harness connector and the PCM C2 harness connector.


Is the resistance below 5.0 Ohms?

Yes


No


5. VVT INTAKE SOLENOID 1/1 ACTUATION
1. Reconnect the PCM C2 harness connector.
2. Turn the ignition on.
3. Using a 12-volt test light connected to ground, probe the (K76) VVT Intake Solenoid 1/1 Driver circuit in the VVT Intake Solenoid 1/1 harness connector.


NOTE: The test light should be off unless you have a short to voltage, except for a brief period immediately after turning ignition on.
4. With the scan tool, actuate the VVT Intake Solenoid 1/1 Control to the ON (100%) position.

NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.


Is the test light illuminated and bright?

Yes


No


6. VVT INTAKE SOLENOID

1. Turn the ignition off.
2. Inspect the wiring and connectors between the VVT Intake Solenoid 1/1 and the Powertrain Control Module (PCM).
3. Verify that there is good pin to terminal contact in the VVT Intake Solenoid 1/1 and Powertrain Control Module harness connectors.
4. Look for any chafed, pierced, pinched or partially broken wires.
5. Look for broken, bent, pushed out or corroded terminals.
6. Look for signs of water intrusion past the connector seal.


Were any problems found?

Yes


No


7. POWERTRAIN CONTROL MODULE (PCM)

1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the VVT Intake Solenoid 1/1 and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.


Were any problems found?

Yes


No