P0206

Schematic:

CIRCUIT DESCRIPTION
The PCM controls the fuel injector control circuit using a Multi Function Driver (MFD). The MFD has the ability to detect an electrical malfunction. If an electrical malfunction is detected, the MFD signals the PCM to set this DTC.

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
^ An incorrect voltage level is being detected on the injector driver circuit.
^ Above condition for over 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
^ The PCM will store conditions which were present when the DTC set as Freeze Frame/Failure Records data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
^ The History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
Monitor the injector fault parameter in the scan tool. Move the electrical harnesses for the effected electrical circuit. If the status changes on the scan tool, that may be an indicator where an intermittent fault may be located.

Inspect for the following:

IMPORTANT: Remove any debris from the connector surfaces before servicing a component. Inspect the connector gaskets when diagnosing or replacing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.

^ Poor terminal connection.
Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Use a corresponding mating terminal to test for proper tension. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagrams.
^ Damaged harness.
Inspect the wiring harness for damage. If the harness appears to be OK observe the display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the display may indicate the location of the fault. Refer to Wiring Repairs in Diagrams.
^ Inspect the PCM and the engine grounds for clean and secure connections.

If the DTC is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set.

TEST DESCRIPTION

Steps 1 - 10:

Steps 11 - 17:

The numbers below refer to the step numbers on the diagnostic table:
4. If the scan tool indicates STUCK HIGH there is a short to battery positive voltage on the fuel injector control circuit.
5. If the scan tool indicates STUCK LOW there is an open or a short to ground on the fuel injector control circuit.
6. If the scan tool indicates a STUCK HIGH while cranking, the short to battery positive voltage is between the injector connector and the PCM. If the scan tool indicates STUCK LOW while cranking the problem is within the injector.
9. This step is testing for a short to ground in the circuit.
10. The fuel injector in this circuit will need to be tested after the short to ground is repaired or after the PCM is replaced.
11. This step is testing the function of the PCM. If the test lamp flashes then the PCM is able to supply the ground.
13. This step will find a open between the splice and the injector.
16. This vehicle is equipped with a PCM which utilizes an Electronically Erasable Programmable Read Only Memory (EEPROM). When the PCM is replaced, the new PCM must be programmed.