Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
- Ignition/Vehicle - Off
- Disconnect the electrical connector: X160 Inline Harness Connector
- Ignition - On / Vehicle - In Service Mode
- Test for 16 V (±3 V) between the test points:
- {Q17A Fuel Injector 1} Control circuit terminal 1 & Ground
- {Q17B Fuel Injector 2} Control circuit terminal 3 & Ground
- {Q17C Fuel Injector 3} Control circuit terminal 5 & Ground
- {Q17D Fuel Injector 4} Control circuit terminal 7 & Ground
- {Q17E Fuel Injector 5} Control circuit terminal 9 & Ground
- {Q17F Fuel Injector 6} Control circuit terminal 11 & Ground
- If not the specified value
- Go to next step: If the specified value
- Test for 0.20 V (±0.17 V) between the test points:
- {Q17A Fuel Injector 1} Control circuit terminal 2 & Ground
- {Q17B Fuel Injector 2} Control circuit terminal 4 & Ground
- {Q17C Fuel Injector 3} Control circuit terminal 6 & Ground
- {Q17D Fuel Injector 4} Control circuit terminal 8 & Ground
- {Q17E Fuel Injector 5} Control circuit terminal 10 & Ground
- {Q17F Fuel Injector 6} Control circuit terminal 12 & Ground
- If not the specified value
- Go to next step: If the specified value
- Test for less than 3 ohms between the test points:
- {Q17A Fuel Injector 1} Control circuit terminal 1 & Control circuit terminal 2
- {Q17B Fuel Injector 2} Control circuit terminal 3 & Control circuit terminal 4
- {Q17C Fuel Injector 3} Control circuit terminal 5 & Control circuit terminal 6
- {Q17D Fuel Injector 4} Control circuit terminal 7 & Control circuit terminal 8
- {Q17E Fuel Injector 5} Control circuit terminal 9 & Control circuit terminal 10
- {Q17F Fuel Injector 6} Control circuit terminal 11 & Control circuit terminal 12
- If 3 ohms or greater
- Verify a condition does not exist with the component: Q17 Fuel Injector - Refer to: Component Testing
- If a condition exists - Replace the component: Q17 Fuel Injector
- If no condition exists - Repair the open/high resistance in the circuit.
- Go to next step: If less than 3 ohms
- Verify the tool is available: CH-51450-A Oscilloscope Diagnostic Kit & CH-51450-LEAD-A Oscilloscope Basic Lead Kit
- If the tool is not available
- Perform the following procedure/test: Engine Compression Test
Verify the procedure/test passes.
- If the procedure/test does not pass. Refer to: Symptoms - Engine Mechanical
- Go to next step: If the procedure/test passes
- Test or replace the component: Q17 Fuel Injector
- Go to next step: If the tool is available
- Perform the following procedure/test: Relative Engine Compression Test
Verify the procedure/test passes.
- If the procedure/test does not pass
Refer to: Symptoms - Engine Mechanical
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Test or replace the component: Q17 Fuel Injector
NOTE:
Testing for steps 4 to 5 is performed on the control module K20 side of the harness connector.
NOTE:
Testing for steps 6 to 7 is performed on the component side of the harness connector.