Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

NOTE:

Disconnecting the component electrical connector causes additional DTCs to set.
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 electrical connector : M103 Turbocharger Vane Position Actuator
Test for less than 5 ohms between the test points : Low Reference circuit terminal 3 & Ground
- If 5 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 3 @ Component harness & The other end of the circuit @ 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 5 ohms
Ignition - On / Vehicle - In Service Mode
Test for 4.8 to 5.2 V between the test points : 5 V Reference circuit terminal 5 & Low Reference circuit terminal 3
- If less than 4.8 V
1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector : K20 Engine Control Module
3. Test for infinite resistance between the test points : 5 V Reference circuit terminal 5 @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - Go to next step : If infinite resistance
4. Test for less than 2 ohms between the test points : 5 V Reference circuit terminal 5 @ Component harness & The other end of the circuit @ 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
- If greater than 5.2 V
1. Ignition/Vehicle - Off
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 : 5 V Reference circuit terminal 5 @ 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 between 4.8 and 5.2 V
Test for 4.8 to 5.2 V between the test points : Serial Data circuit terminal 4 @ Component harness & Ground
- If less than 4.8 V
1. Ignition/Vehicle - Off
2. Disconnect the appropriate electrical connector : K20 Engine Control Module
3. Test for infinite resistance between the test points : Serial Data circuit terminal 4 @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - Go to next step : If infinite resistance
4. Test for less than 2 ohms between the test points : Serial Data circuit terminal 4 @ Component harness & The other end of the circuit @ 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
- If greater than 5.2 V
1. Ignition/Vehicle - Off
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 : Serial Data circuit terminal 4 @ Component harness & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - Go to next step : If less than 1 V - Replace the component : K20 Engine Control Module
- Go to next step : If between 4.8 and 5.2 V
Test or replace the component : M103 Turbocharger Vane Position Actuator