Circuit/System Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle Off. Swap the two components: B130A Exhaust Gas Recirculation Temperature Sensor 1 and B130B Exhaust Gas Recirculation Temperature Sensor 2, Ignition ON/Vehicle in Service Mode.
Verify the DTC for B130 Exhaust Gas Recirculation Temperature Sensor does not change to follow the sensor.
- If the DTC changes
  Test or replace the B130 Exhaust Gas Recirculation Temperature Sensor
- Go to next step: If the DTC does not change
Ignition/Vehicle Off, and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down.
Disconnect the appropriate electrical connector: B130 Exhaust Gas Recirculation Temperature Sensor
Test for less than 10 Ω between the appropriate low reference circuit terminal 2 and ground.
- If 10 Ω or greater
1. Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.
2. Test for less than 2 Ω in the low reference circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the K20 Engine Control Module.
- Go to next step: If less than 10 Ω
Ignition/Vehicle Off, disconnect the harness connector at the K20 Engine Control Module.
Ignition - On / Vehicle - In Service Mode
Test for less than 1 V between the signal circuit and 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 infinite resistance between the signal circuit terminal 1 and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 2 Ω in the signal circuit end to end.
- If 2 ohms or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 ohms
Replace the component:K20 Engine Control Module