2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1223
DTC P0270
- Cylinder 4 Injector Control Circuit Low Voltage
DTC P0271
- Cylinder 4 Injector Control Circuit High Voltage
DTC P0273
- Cylinder 5 Injector Control Circuit Low Voltage
DTC P0274
- Cylinder 5 Injector Control Circuit High Voltage
DTC P0276
- Cylinder 6 Injector Control Circuit Low Voltage
DTC P0277
- Cylinder 6 Injector Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied directly to the fuel
injectors. The control module controls each fuel injector by grounding the control circuit with a solid state device called a driver. The control
module monitors the status of each driver. Each driver has a feedback voltage circuit which the Engine Control Module (ECM) monitors. The
injector control circuits are pulled-up to voltage within the ECM. The ECM can determine if a control circuit is open, shorted to ground, or shorted
to a voltage by monitoring the feedback voltage.
Conditions for Running the DTC
* The engine speed is greater than 80 RPM.
* The ignition voltage is between 10-18 V.
* The fuel injector has been commanded ON and OFF at least once.
* The DTCs run continuously once the above conditions are met.
Conditions for Setting the DTC
P0201, P0202, P0203, P0204, P0205, or P0206
The ECM detects the injector control circuit is open for greater than 4 s or for a cumulative of 50 s.
P0261, P0264, P0267, P0270, P0273, or P0276
The ECM detects the injector control circuit is shorted to ground for greater than 4 s or for a cumulative of 50 s.
P0262, P0265, P0268, P0271, P0274, or P0277
The ECM detects the injector control circuit is shorted to voltage for greater than 4 s or for a cumulative of 50 s.
Action Taken When the DTC Sets
