2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1221
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the scan tool Cylinder 1-6 Current Misfire Counter. The Cylinder 1-6 Current Misfire Counters should not increment.
2. Engine operating, observe the scan tool DTC information. DTCs P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265,
P0267, P0268, P0270, P0271, P0273, P0274, P0276, and P0277 should not set.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that are captured in the Freeze Frame/Failure Records Data List.
Circuit/System Testing
1. Ignition OFF, disconnect the fuel injector multi-way harness connector X145.
Note: Testing for steps 2 through 4 is performed on the ECM side of the multi-way harness connector.
2. Ignition ON, connect a test lamp between each ignition circuit terminal 1/2 and ground. The test lamp should illuminate at each ignition
circuit.
瀚慖f the test lamp does not illuminate, test the ignition circuits for a short to ground, or an open/high resistance. If the circuits test normal
and the ignition circuit fuse is open, test or replace the appropriate Q17 fuel injector.
3. Test for 2.6-4.6 V between the appropriate fuel injector control circuit 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 less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the K20 Engine Control Module.
瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control
Module.
4. Probe the appropriate fuel injector control circuit listed below with a test lamp connected to B+. Engine cranking, verify the test lamp flashes.
* 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 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
