Circuit/System Testing

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

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.

Ignition/Vehicle & All vehicle systems - Off
Disconnect the appropriate electrical connector:
- X154 Inline Harness Connector
- X159 Inline Harness Connector
- X177 Inline Harness Connector
Test for less than 10 ohms between the test points: Low Reference circuit terminal E & Ground
- If 10 ohms or greater
1. Disconnect the appropriate electrical connector: K20 Engine Control Module
2. Test for less than 2 ohms between the test points: Low Reference circuit terminal E @ Component harness & Terminal X2 29 @ Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: K20 Engine Control Module
- Go to next step: If less than 10 ohms
Ignition - On / Vehicle - In Service Mode
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 D & Ground
- If the test lamp turns On
1. Ignition/Vehicle - Off & Remove - Test lamp
2. Disconnect the appropriate 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 D @ Component harness & Ground
  - 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
- If not the specified state
1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector: K20 Engine Control Module
3. Test for infinite resistance between the test points: Control circuit terminal D @ 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 D & 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 appropriate electrical connector: K20 Engine Control Module
3. Test for less than 2 ohms between the test points: Control circuit terminal D @ Component harness & Terminal 11 X2 @ Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - 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. Verify a condition does not exist with the component:
  - Camshaft Position Actuator Solenoid Valve - Binding or Sticking - Refer to: Camshaft Position Actuator Solenoid Valve Inspection (Off-Vehicle) , or Camshaft Position Actuator Solenoid Valve Inspection (On-Vehicle)
  - Camshaft Position Actuator - Damaged or misaligned reluctor ring. - Refer to: Camshaft Position Actuator Cleaning and Inspection
  - If a condition exists - Repair or replace as necessary
  - If no condition exists - Refer to: Component Testing
- Go to next step: If the DTC is not set
Test or replace the component: Q6 Camshaft Position Actuator Solenoid Valve