2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1314
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate T8 ignition coil.
2. Ignition OFF, all vehicle systems OFF, it may take up to 2 minutes for all the systems to power down, test for less than 5 ohm between the
ground circuit terminal A and ground.
瀚慖f greater than the specified range, repair the ground circuit for an open/high resistance.
3. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal B and ground.
瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
4. Ignition ON, verify that a test lamp illuminates between ignition voltage circuit terminal D and ground.
瀚慖f the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests
normal and the ignition voltage circuit fuse is open, test all the components connected to the ignition voltage circuit and replace as
necessary.
5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not
Run.
瀚慖f test status is Malfunction test for open or short to ground.
6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.
瀚慖f test status is Malfunction test for open circuit.
7. Engine running, observe the Ignition Coil 1-6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not
Run.
瀚慖f test status is Malfunction test for short to voltage.
8. If all circuits test normal, test or replace the appropriate T8 ignition coil.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil
Replacement - Bank 1)
* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil
Replacement - Bank 2)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0355
DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (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 P0351
- Ignition Coil 1 Control Circuit
DTC P0352
- Ignition Coil 2 Control Circuit
DTC P0353
- Ignition Coil 3 Control Circuit
