Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition/Vehicle - Off
- Disconnect the appropriate electrical connector:
- B193A Charge Air Cooler Air Temperature Sensor - Inlet
- B193B Charge Air Cooler Air Temperature Sensor - Outlet
- Ignition - On / Vehicle - In Service Mode
- Verify the scan tool parameter:
- { B193A } Charge Air Cooler Temperature Sensor = Colder than -39°C (-38°F)
- { B193B } Charge Air Cooler Temperature Sensor 2 = Colder than -39°C (-38°F)
- If -39°C (-38°F) or warmer
- Ignition/Vehicle - Off
- Disconnect the appropriate electrical connector: K20 Engine Control Module
- Test for infinite resistance between the test points:
- Signal circuit terminal 1 @ Component harness & Ground
- Signal circuit terminal 2 @ 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 colder than -39°C (-38°F)
- Connect a 3 A fused jumper wire between the test points:
- Signal circuit terminal 1 & Ground
- Signal circuit terminal 2 & Ground
- Verify the appropriate scan tool parameter:
- Charge Air Cooler Temperature Sensor = Warmer than 214°C (417°F)
- Charge Air Cooler Temperature Sensor 2 = Warmer than 214°C (417°F)
- If 214°C (417°F) or colder
- Ignition/Vehicle - Off & Remove - Jumper wire (s)
- Disconnect the appropriate electrical connector: K20 Engine Control Module
- Ignition - On / Vehicle - In Service Mode
- Test for less than 1 V between the test points:
- Signal circuit terminal 1 @ Component harness & Ground
- Signal circuit terminal 2 @ 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
- Ignition/Vehicle - Off
- Test for less than 2 ohms between the test points:
- Signal circuit terminal 1 @ Component harness @ Component harness & The other end of the circuit @ Control module harness
- Signal circuit terminal 2 @ Component harness @ 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 warmer than 214°C (417°F)
- Test or replace the component: B193A Charge Air Cooler Air Temperature Sensor - Inlet or B193B Charge Air Cooler Air Temperature Sensor - Outlet
NOTE:
If the fuse in the jumper wire opens, repair the short to voltage on the circuit.