Diagnostic Instructions
DTC Descriptor
DTC 017: Injector Control Circuit
Circuit/System Description
The engine control module (ECM) enables the appropriate fuel injector pulse for each cylinder. Ignition voltage is supplied to the fuel injectors. The ECM controls each fuel injector by grounding the control circuit via a solid state device called a driver.
The ECM monitors the status of each driver.
Conditions for Setting the DTC
| • | The fuel pump is running. |
| • | The ignition 1 voltage is greater than 9 volts. |
| • | A fuel injector fault has been detected over 3 times of successive 1 second intervals. |
| • | The DTCs run continuously once the above conditions are met. |
Reference Information
Schematic Reference
Engine Controls Schematics
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Special Tools
J 34730-405
Injector Test Lamp
Circuit/System Verification
Engine running, observe the DTC information with a scan tool. DTC 017 should not set.
Circuit/System Testing
- Engine idling, disconnect one fuel injector connector at a time to isolate the misfiring cylinder. The engine speed should change when an injector is disconnected.
Important: The test lamp is used to load the circuit and may not illuminate.
- Connect a test lamp between the ignition 1 voltage circuit terminal A and ground.
- Ignition ON, load test for battery voltage between the ignition 1 voltage circuit terminal A and ground.
| ⇒ | If less than B+, repair the ignition 1 voltage circuit for a short to ground or an open/high resistance. |
- Ignition OFF, connect a
J 34730-405
between the control circuit terminal B and the ignition 1 voltage circuit terminal A.
- Engine running, the test lamp should flash.
| ⇒ | If the test lamp is always ON, test the control circuit for a short to ground. If circuit tests normal, replace the ECM. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM. |
- If all circuits test normal, test or replace the fuel injector.
Component Testing
- Ignition OFF, disconnect the harness connector at the fuel injector.
Important: The engine coolant temperature (ECT) sensor must be between 10-32°C (50-90°F) in order for an accurate measurement.
- Test for 11-14 ohms between the control terminal B and the ignition 1 voltage terminal A.
| ⇒ | If not within the specified range, replace the fuel injector. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
