P0206
DTC P0206
DTC DESCRIPTORS
DTC P0201
Fuel Injector 1 Control Circuit
DTC P0202
Fuel Injector 2 Control Circuit
DTC P0203
Fuel Injector 3 Control Circuit
DTC P0204
Fuel Injector 4 Control Circuit
DTC P0205
Fuel Injector 5 Control Circuit
DTC P0206
Fuel Injector 6 Control Circuit
DTC P0207
Fuel Injector 7 Control Circuit
DTC P0208
Fuel Injector 8 Control Circuit
DIAGNOSTIC FAULT INFORMATION
IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
CIRCUIT/SYSTEM DESCRIPTION
The engine control module (ECM) supplies voltage to each fuel injector on the injector positive voltage control circuits. The ECM energizes each fuel injector by grounding the control circuit of that fuel injector. The ECM monitors the status of the injector positive voltage control circuits and the fuel injector control circuits. The injectors are separated into the following four groups:
- Group 1-DTC P2146 with injectors 1 and 4
- Group 2-DTC P2149 with injectors 6 and 7
- Group 3-DTC P2152 with injectors 2 and 5
- Group 4-DTC P2155 with injectors 3 and 8
When a fuel injector circuit condition is detected by the ECM, the affected fuel injectors will be disabled and may disable the affected group of fuel injectors.
CONDITIONS FOR RUNNING THE DTC
- The engine is running.
- The charging system voltage is between 6-18 volts.
CONDITIONS FOR SETTING THE DTC
- The ECM injector output driver detects an incorrect current on a fuel injector circuit.
- The condition exists for 3-6 seconds.
ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
- The control module disables the group of fuel injectors that have a concern.
CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.
CIRCUIT/SYSTEM VERIFICATION
IMPORTANT: If you cannot duplicate the condition, 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.
Observe the Balancing Rate parameters with a scan tool. Normal reading should be between +4 cu.mm and -4 cu.mm at idle, and between +6 cu.mm and -6 cu.mm in drive. With the engine running at idle, the Actual Fuel Rail Pressure should be close to the Desired Fuel Rail Pressure.
CIRCUIT/SYSTEM TESTING
Observe the DTC information with a scan tool. If DTC P2146, P2149, P2152 or P2155 are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.
One Fuel Injector DTC Sets
1. Disconnect the affected fuel injector connector.
2. With ignition OFF, connect a test lamp between the affected fuel injector control circuit and a ground.
- If the test lamp illuminates, test the injector control circuit for a short to voltage.
- If the test lamp did not illuminate, test the affected fuel injector control circuit for an open.
3. Test the affected fuel injector for high resistance. Refer to Component Testing in this diagnostic.
- If all circuits test normal, replace the ECM.
Two or More Fuel Injector DTCs Set
1. Test the affected group injector positive voltage control circuit for an open.
2. Test the affected fuel injector for high resistance. Refer to Component Testing in this diagnostic.
- If all circuits test normal, replace the ECM.
COMPONENT TESTING
1. Disconnect the connector of the fuel injector to be tested.
2. Connect a DMM between the terminals of the fuel injector and measure the resistance. The resistance should be 0.2-0.3 ohms.
- If the resistance is more than 0.2-0.3 ohms resistance, replace the fuel injector.
REPAIR INSTRUCTIONS
IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Fuel Injector Replacement (Left) Fuel Injector Replacement (Right)
- Control Module References for ECM replacement, programing and setup