2010 Cadillac CTS Sedan AWD V6-3.6L Page 999
Air Intake System Description (w/LLT) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and Operation/Air Intake
System Description)Air Intake System Description (w/LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Description and
Operation/Air Intake System Description)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
J 38522 Variable Signal Generator
Circuit/System Verification
1. Verify that DTCs P0685, P0689, P0690 or B1380 are not set.
瀚慖f any of the DTCs are set, refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code
Descriptions/Powertrain Diagnostic Trouble Code (DTC) Type Definitions).
2. Engine idling for 1 min, observe the DTC information with a scan tool. DTC P0101 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 you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Verify that DTCs P0685, P0689, P0690 or B1380 are not set.
瀚慖f any of the DTCs are set, refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code
Descriptions/Powertrain Diagnostic Trouble Code (DTC) Type Definitions).
2. Inspect for the following conditions:
* An engine vacuum leak
* An air leak in the intake air duct between the mass air flow (MAF) sensor and the throttle body
* A plugged or collapsed intake air duct
* Objects that block the MAF sensor air inlet
* An air filter element that is restricted
* The hydro-carbon absorber, where fitted, in the air cleaner assembly for ruptures or deterioration.
* A restricted throttle plate or for carbon build-up around the throttle plate
* An unseated engine oil dip stick
* A loose or missing engine oil fill cap
* An over filled crankcase
瀚慖f you find any of the above conditions, repair as necessary.
3. Ignition OFF, disconnect the harness connector at the B75B MAF/IAT sensor.
4. Ignition OFF, test for less than 5 ohm between the ground circuit terminal C and the battery ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
Caution: Do NOT use the low reference circuit in the component harness connector for this test. Damage to the control module may occur
due to excessive current draw.
5. Ignition ON, load test the ignition circuit for B+ between terminal B and ground.
瀚慖f less than the specified value, test the ignition circuit for an open/high resistance.
6. Test for 4.8-5.2 V between the signal circuit terminal A and the ground circuit terminal C.
