Monday, December 2, 2019

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1199

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1199



2. Clear the DTC Info with a scan tool.



3. Start the engine, observe the scan tool Throttle Position Sensor 1 and 2 voltage parameters. TP sensor 1 should be between 0.17-4.6 V and



TP sensor 2 should be between 0.15-4.8 V.



4. Observe the scan tool Throttle Position sensor 1 and 2 parameters while performing the tests listed below. The parameter should display



Agree.



* Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release pedal. Repeat the



procedure several times.



* Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times.



5. Observe the DTC Information with a scan tool. DTCs P0121, P0122, P0123, P0221, P0222, and P0223 should not set.



6. 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 you observed from the Freeze Frame/Failure Records data.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at throttle body.



2. Ignition OFF, remove the fuse that supplies B+ to terminal 56 X2 of the ECM.



Note: The control module or the sensor may be damaged if the circuit is shorted to battery positive voltage.



3. Test for less than 5 ohm between the low reference circuit terminal C and ground.



瀚慖f greater than the specified range, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests



normal, replace the Engine Control Module.



4. Install fuse that supplies B+ to terminal 56 X2 of the ECM.



5. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal E and ground.



瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



Engine Control Module.



瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the Engine Control Module.



6. Ignition ON, verify that the scan tool Throttle Position Sensor 1 voltage parameter is less than 0.3 V.



瀚慖f greater than the specified value, test the signal circuit terminal D for a short to voltage. If the circuit tests normal, replace the Engine



Control Module.



7. Connect a 3 A fused jumper wire between the 5 V reference circuit terminal E and the TP sensor 1 signal circuit terminal D. Verify the scan



tool Throttle Position Sensor 1 voltage parameter is greater than 4.89 V.



瀚慖f less than the specified value, test the signal circuit for an open/high resistance or for a short to ground. If the circuit tests normal,



replace the Engine Control Module.



8. Verify the scan tool Throttle Position Sensor 2 voltage parameter is greater than 4.97 V.



瀚慖f less than the specified value, test the signal circuit terminal F for a short to ground. If the circuit tests normal, replace the Engine



Control Module.



Note: If the fuse in the jumper wire opens, the signal circuit is shorted to a voltage.



9. Connect a 3 A fused jumper wire between the TP sensor 2 signal circuit terminal F and the low reference circuit terminal C. Verify the scan



tool Throttle Position Sensor 2 voltage parameter is less than 0.10 V.



瀚慖f greater than the specified value, test the signal circuit for an open/high resistance or for a short to voltage. If the circuit tests normal,



replace the Engine Control Module.



10. If all circuits test normal, replace the throttle body assembly.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and



Repair/Removal and Replacement)Throttle Body Assembly Replacement (LLT) (See: Powertrain Management/Fuel Delivery and Air



Induction/Throttle Body/Service and Repair/Removal and Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for Engine Control Module replacement, setup, and

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