Circuit/System Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle & All vehicle systems - Off
NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.
Disconnect the appropriate electrical connector : Q6 Camshaft Position Actuator Solenoid Valve
Test for less than 10 Ω between the test points : Low Reference circuit terminal 1/A & Ground
- If 10 Ω or greater
1. Disconnect the electrical connector : K20 Engine Control Module
2. Test for less than 2 Ω between the test points : Low Reference circuit terminal 1/A @ Component harness & The other end of the circuit @ Control module harness
  - If 2 Ω or greater - Repair the open/high resistance in the circuit.
  - If less than 2 Ω - Replace the component : K20 Engine Control Module
- Go to next step : If less than 10 Ω
Engine - Running
Perform the scan tool control function :
Camshaft Position Actuator Solenoid Valve - Off

Verify a test lamp does not turn On between the test points : Control circuit terminal 2/B & Ground
- If the test lamp turns On
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Disconnect the electrical connector : K20 Engine Control Module
3. Ignition - On / Vehicle - In Service Mode
4. Test for less than 1 V between the test points : Control circuit terminal 2/B @ Component harness & The other end of the circuit @ Control module harness
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - If less than 1 V - Replace the component : K20 Engine Control Module
- Go to next step : If the test lamp does not turn On
Remove - Test Lamp
Perform the scan tool control function :
Camshaft Position Actuator Solenoid Valve - On
- Verify the scan tool parameter :
- Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
- If not the specified state
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector : K20 Engine Control Module
3. Test for infinite resistance between the test points : Control circuit terminal 2/B @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component : K20 Engine Control Module
- Go to next step : If the specified state
Connect a 3 A fused jumper wire between the test points : Control circuit terminal 2/B & Ground
Perform the scan tool control function :
- Camshaft Position Actuator Solenoid Valve - On
- Verify the scan tool parameter :
- Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = Malfunction
- If not the specified state
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector : K20 Engine Control Module
3. Test for less than 2 Ω between the test points : Control circuit terminal 2/B @ Component harness & The other end of the circuit@Control module harness
  - If 2 Ω or greater - Repair the open/high resistance in the circuit.
  - If less than 2 Ω - Replace the component : K20 Engine Control Module
- Go to next step : If the specified state
Verify DTC P0011 is not set.
- If the DTC is set
1. Ignition/Vehicle - Off
2. Inspect the component for wear or damage :
  - Camshaft Position Actuator Magnet Refer to Camshaft Position Actuator Magnet Cleaning and Inspection
  - Camshaft Position Actuator Solenoid Valve Refer to Camshaft Position Actuator Solenoid Valve Inspection
  - Camshaft Position Actuator Refer to Camshaft Position Actuator Cleaning and Inspection
  - If worn or Visible Damage - Repair or replace as necessary.
- Go to next step : If the DTC is not set
Test or replace the component : Q6 Camshaft Position Actuator Solenoid Valve