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
- Disconnect the appropriate component:Q17 Fuel Injector
- Test for 1.35 to 1.65 ohms between the test points: Control circuit terminal 2 & Ground circuit terminal 1 @ Q17 Fuel Injector @ Temperature20°C (68°F).
- If not between 1.35 and 1.65 ohms
Replace the component:Q17 Fuel Injector
- Go to next step: If between 1.35 and 1.65 ohms
- If not between 1.35 and 1.65 ohms
- Disconnect the electrical connector:X3 @ K20 Engine Control Module
- Test for less than 2 ohms between the test points:Control circuit terminal 1 @ Component harness &
- {Q17A Fuel Injector 1} Terminal 52 @ Control module harness
- {Q17B Fuel Injector 2} Terminal 49 @ Control module harness
- {Q17C Fuel Injector 3} Terminal 51 @ Control module harness
- {Q17D Fuel Injector 4} Terminal 50 @ Control module harness
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 ohms
- Test for less than 2 ohms between the test points:Control circuit terminal 2 @ Component harness &
- {Q17A Fuel Injector 1} Terminal 72 @ Control module harness
- {Q17B Fuel Injector 2} Terminal 69 @ Control module harness
- {Q17C Fuel Injector 3} Terminal 71 @ Control module harness
- {Q17D Fuel Injector 4} Terminal 70 @ Control module harness
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 ohms
- Replace the appropriate component: = Q17 Fuel Injector - Monitor the scan tool parameter:Misfire Data
- Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
- Verify the DTC does not set.
- If the DTC sets
Replace the component:K20 Engine Control Module
- Go to next step: If no DTC is set
- If the DTC sets
- All OK.