2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1229
* Injector 5 terminal 5
* Injector 6 terminal 8
瀚慖f the test lamp remains OFF, test the control circuit for a high resistance. If the circuit/connections test normal, replace the K20 Engine
Control Module.
Note: Testing for steps 5 and 6 is performed on the fuel injector side of the multi-way harness connector. It may be necessary to remove the
intake manifold to isolate the condition.
5. Ignition OFF, test for infinite resistance between the ignition voltage circuit terminal listed below and ground.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
瀚慖f not the specified value, repair the ignition voltage, or control circuit, for a short to ground. If the circuits/connections test normal, test
or replace the appropriate Q17 fuel injector.
6. Test for 12-16 ohm between the appropriate ignition voltage circuit terminal 1 or 2 and each fuel injector control circuit listed below.
* Injector 1 terminal 3
* Injector 2 terminal 6
* Injector 3 terminal 4
* Injector 4 terminal 7
* Injector 5 terminal 5
* Injector 6 terminal 8
瀚慖f less than the specified range, test for a short between the control circuit and the ignition voltage circuit. If the circuits/connections test
normal, test or replace the appropriate Q17 fuel injector.
瀚慖f greater than the specified range, test the ignition voltage, and fuel injector control circuit, for an open/high resistance. If the
circuits/connections test normal, test or replace the appropriate Q17 fuel injector.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Fuel Injector Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for Engine Control Module replacement, setup, and
programming
P0277
DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277
(LAU)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0201
- Cylinder 1 Injector Control Circuit
DTC P0202
- Cylinder 2 Injector Control Circuit
DTC P0203
- Cylinder 3 Injector Control Circuit
