Engine Controls/fuel - 3.6l (Lfx) - Repair Instructions Cadillac ATS I

Crankshaft Position System Variation Learn

The Crankshaft Position Variation Learn procedure is required when the following service procedures have been performed, regardless of whether DTC P0315 is set

1. An engine replacement
2. A engine control module (ECM) replacement
3. A crankshaft balancer replacement
4. A crankshaft replacement
5. A crankshaft position sensor replacement
6. Any engine repairs which disturb the crankshaft to crankshaft position sensor relationship.

The ECM monitors certain component signals to determine if all the conditions are met to continue with the Crankshaft Position Variation Learn procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool displays the signals of the following components

1. Crankshaft position sensors activity: If there is a crankshaft position sensor condition, refer to the applicable DTC set.
2. Camshaft position sensor signal activity: If there is a camshaft position sensor signal condition, refer to the applicable DTC set.
3. Engine coolant temperature (ECT): If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.

1. Ignition ON.
2. Verify no DTCs are set. If any DTCs other than P0300-P0308 or P0315 are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If DTC P0300-P0308, P0315, or no DTCs are set
3. Engine Running at normal operating temperature, perform the scan tool Crankshaft Position Variation Learn procedure and follow the on screen instructions.
4. Verify the scan tool displays Test Passed Successfully when completed. If Test Passed Successfully is not displayed Verify that none of the following conditions exist: The ignition switch is in the ON position until there is insufficient system voltage. An ECM power disconnect with the ignition ON that may have erased the crankshaft position system variation values and set DTC P0315 Interference in the signal circuit of the crankshaft position sensor Debris between the crankshaft position sensor and the reluctor wheel A damaged or misaligned reluctor wheel Worn crankshaft main bearings Excessive crankshaft runout A damaged crankshaft If a condition is exists Repair or replace as necessary. Engine Running at normal operating temperature, perform the scan tool Crankshaft Position Variation Learn procedure and follow the on screen instructions. If no conditions exist, replace the K20 Engine Control Module. If Test Passed Successfully is displayed
5. Clear all DTCs.
6. Engine Running.
7. Verify a DTC is not set. If a DTC is set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If a DTC is not set
8. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for engine control module programming, and setup

Scheme 72

Engine Control Module Replacement

Scheme 73

Engine Control Module Bracket Replacement

Description

The engine control module (ECM) learns the airflow through the throttle body to ensure the correct idle. The learned airflow values are stored within the ECM. These values are learned to adjust for production variation and will continuously learn during the life of the vehicle to compensate for reduced airflow due to throttle body coking. Anytime the throttle body airflow rate changes, for example due to cleaning or replacing, the values must be relearned.

An engine that had a heavily coked throttle body that has been cleaned or replaced may take several drive cycles to unlearn the coking. To accelerate the process, the scan tool has the ability to reset all learned values back to zero. A new ECM will also have values set to zero.

The idle may be unstable or a DTC may set if the learned values do not match the actual airflow.

Conditions for Running the Throttle Learn Procedure

Scan tool Idle Learn or Idle Learn Reset Procedure

1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201-P0208, P0220, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0279, P0280, P0282, P0283, P0300-P0308, P0351-P0358, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
2. Ignition ON, engine OFF.
3. The vehicle speed sensor (VSS) is 0 km/h (0 mph).

Service Bay/On Road Learn Procedure

1. DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0171, P0172, P0174, P0175, P0201-P0208, P0220, P0222, P0223, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, P0277, P0279, P0280, P0282, P0283, P0300-P0308, P0351-P0358, P0496, P0601, P0604, P0606, P060D, P0641, P0651, P1516, P2101, P2119, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, or P2176 are not set.
2. The engine speed is between 450-4,000 RPM.
3. The manifold absolute pressure (MAP) is greater than 5 kPa.
4. The mass air flow (MAF) is greater than 2 g/s.
5. The ignition voltage is greater than 10 volts.

Throttle Learn

Scan Tool Idle Learn or Idle Learn Reset Procedure - Performed after the throttle body is cleaned or replaced

1. Ignition ON, engine OFF, perform the Idle Learn or Idle Learn Reset in Configuration/Reset or Module Setup.
2. Engine idling, observe the scan tool Throttle Body Idle Airflow Compensation parameter. The Throttle Body Idle Airflow Compensation value should equal 0 % and the engine should be idling at a normal idle speed.
3. Clear the DTCs and return to the diagnostic that referred you here.

Service Bay/On Road Idle Learn Procedure - Performed after the ECM is programmed or replaced

1. Engine idling for 3 min.
2. Observe the scan tool Desired Idle Speed and the actual Engine Speed parameters.
3. The ECM will start to learn the new idle cells and the Desired Idle Speed should start to decrease.
4. Ignition OFF for 60 s.
5. Start and idle the engine for 3 min.
6. After the 3 min run time the engine should be idling normal. NOTE: During the drive cycle the check engine light may come on with idle speed DTCs. If idle speed codes are set, clear codes so the ECM can continue to learn. If the engine idle speed has not been learned the vehicle will need to be driven at speeds above 70 km/h (44 mph) with several decelerations and extended idles.
7. After the drive cycle, the engine should be idling normally. If the engine idle speed has not been learned, turn OFF the ignition for 60 s and repeat step 6.
8. Once the engine speed has returned to normal, clear DTCs and return to the diagnostic that referred you here.

Scheme 74

Engine Coolant Temperature Sensor Replacement

Scheme 75

Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Removal Procedure

1. Ignition OFF.
2. Remove the intake manifold sight shield.
3. Disconnect the engine wiring harness from the manifold absolute pressure (MAP) sensor (2).
4. Remove the MAP sensor to intake manifold retaining bolt (1).
5. Remove the MAP sensor (2) from the intake manifold assembly.
6. Discard the MAP sensor seal.

Installation Procedure

1. Install a NEW MAP sensor seal.
2. Install the MAP sensor (2) to the intake manifold assembly.
3. Install the MAP sensor to intake manifold retaining bolt (1) and tighten to 4 N.m (35 lb in).
4. Connect the engine wiring harness to the manifold absolute pressure (MAP) sensor (2).
5. Install the intake manifold sight shield.

Scheme 76

Heated Oxygen Sensor Replacement - Bank 1 Sensor 1

Scheme 77

Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Scheme 78

Heated Oxygen Sensor Replacement - Bank 2 Sensor 1

Scheme 79

Heated Oxygen Sensor Replacement - Bank 2 Sensor 2

Scheme 80

Accelerator Pedal Position Sensor Replacement

Scheme 81

Throttle Body Assembly Replacement

Throttle Body Inspection and Cleaning

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Fully open the throttle valve in order to Inspect the throttle body bore and the throttle valve plate for any deposits.
3. Use a clean shop towel and Top Engine Cleaner GM P/N 1052626 or equivalent product in order to clean the throttle body bore and the throttle valve plate. If necessary, use a parts cleaning brush in order to remove heavy deposits.
4. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Perform the Throttle/Idle Learn procedure. Refer to «Q38 Throttle Body: Throttle/Idle Learn»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Fuel Pressure Relief

1. Engine at idle, with a scan tool enable the Control Functions Depressurize Fuel System.
2. Verify the engine stalls, if engine does not stall repeat step 1.

Fuel Pressure Gauge Installation and Removal

Special Tools

CH 48027 Digital Pressure Gauge

For equivalent regional tools, refer to Special Tools (Diagnostic Tools)

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. For LFX only, remove the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
4. Wrap a shop towel around the fuel rail service port.
5. Connect the CH 48027 gauge (1) to the CH 48027 adapter (2).
6. Connect the CH 48027 adapter (3) to the fuel rail service port.
7. Connect the CH 48027 adapter (2) to CH 48027 adapter (3).
8. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
9. Perform any tests and/or diagnostics as needed. For the proper usage of the CH 48027 gauge (1), refer to the manufacture's directions.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) . Wrap a shop towel around the fuel rail service port. Place the hose on the CH 48027 adapter (2) into an approved gasoline container. Open the valve on the CH 48027 adapter (2) in order to bleed any fuel from the fuel rail. Close the valve on the CH 48027 adapter (2). Remove the hose on the CH 48027 adapter (2) from the approved gasoline container. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
2. Disconnect the CH 48027 gauge (1) from the CH 48027 gauge (2).
3. Disconnect the CH 48027 adapter (2) from the CH 48027 adapter (3).
4. Disconnect the CH 48027 adapter (3) from the fuel rail service port.
5. Install the fuel rail service port cap.
6. For LFX only, install the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
7. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

Metal Collar Quick Connect Fitting Service

Special Tools

1. CH-41769 Fuel Line Disconnect Tool Set
2. CH-44581 Fuel Line Disconnect Tool

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the retainer from the quick-connect fitting.
3. Blow dirt out of the fitting using compressed air.
4. Depending on the fuel line size and ability to access the fitting, choose the appropriate tool: CH-41769 fuel line disconnect tool set or CH-44581 fuel line disconnect tool. Insert the CH-41769 fuel line disconnect tool set or CH-44581 fuel line disconnect tool into the female connector, then push inward to release the locking tabs.
5. Pull the connection apart.
6. Using a clean shop towel, wipe off the male pipe end.
7. Inspect both ends of the fitting for dirt and burrs.
8. Clean or replace the components as required.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the quick-connect fitting together to cause the retaining tabs to snap into place.
3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
4. Install the retainer to the quick-connect fitting.
5. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

Note. If servicing a fuel system, insure the fuel pressure has been relieved.

Scheme 82

Note. There are several types of plastic collar fuel and evaporative emission quick connect fittings used on this vehicle. Bartholomew (1) Q Release (2) Squeeze to Release (3) Sliding Retainer (4) Global Connect (5) TI Loc (6) Safe Lock (7) Plastic Connector (8) The following instructions apply to all of these types of plastic collar quick connect fittings except where indicated.

1. Using compressed air, blow any dirt out of the quick-connect fitting.
2. This step applies to Bartholomew style connectors ONLY. Squeeze the plastic quick-connect fitting release tabs.
3. This step applies to Q Release style connectors ONLY. Release the fitting by Pushing the tab toward the other side of the slot in the fitting.
4. This step applies to Squeeze to Release style connectors ONLY. Squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
5. This step applies to Squeeze to Release style connectors ONLY. Push in the male side slightly in order to slide the retainer away from the retainers, squeeze where indicated by arrows on both sides of the plastic ring surrounding the quick-connect fitting.
6. This step applies to Sliding Retainer style connectors ONLY. Release the fitting by pressing on one side of the release tab causing it to push in slightly. If the tab doesn't move try pressing the tab in from the opposite side. The tab will only move in one direction.
7. This step applies to the Global Connector style only. Push the connector toward the tube in order to release the pressure. Press and hold down the release mechanism, and pull the connector straight out.
8. This step applies to the TI Loc style only. Push the connector toward the tube in order to release the pressure. Release the redundant latch (1) with two fingers or a flat bladed tool. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
9. This step applies to the Safe Lock style only. Push the connector toward the tube in order to release the pressure. Release the second latch (1) with two fingers. Then press and hold down the bottom release mechanism (2) and pull the connector straight out.
10. This step applies to the Plastic Connector style 8, push the connector toward the tube in order to release the pressure. Press the latch (1) inward in order to release the pipe, while pulling the connector (2) straight out.
11. Using a clean shop towel, wipe off the male pipe end.
12. Inspect both ends of the fitting for dirt and burrs.
13. Clean or replace components as necessary.

1. Apply a few drops of clean engine oil to the male pipe end.
2. Push both sides of the quick-connect fitting together in order to cause the retaining feature to snap into place.
3. Pull on both sides of the quick-connect fitting to make sure the connection is secure.
4. Insert the tube in the connector until the retainer snaps in place.
5. Push down on the redundant latch (1) until it is fully engaged and snapped into position.
6. Insert the tube in the connector until the retainer snaps in place.
7. Push down on the second latch (1) in order to secure the connection.
8. For the plastic connector type 8, depress the latch (1) while inserting the connector (3) on to the pipe (2) .
9. Move the latch (1) upward in order to secure the connection.
10. Inspect for leaks using the following procedure: Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF, for 10 seconds. Turn the ignition ON, with the engine OFF for 2 seconds. Turn the ignition OFF. Inspect for leaks.

Special Tools

1. DT 36850 Transjel Lubricant
2. CH 45004 Fuel Tank Drain Hose

1. Raise and Support the Vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle)
2. Loosen the lower fill hose clamp in order to separate the fill hose from the fuel tank (1).
3. Insert the CH 45004 Fuel Tank Drain Hose into the fuel tank (1) until the hose reaches the bottom of the fuel tank.
4. Use a hand or air operated pump device in order to drain as much fuel from the fuel tank as possible.

Scheme 83

Fuel Tank Protector Replacement

1. Relieve the system fuel pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief)
2. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the left and right side rear air deflectors. Refer to «Underbody Rear Air Deflector Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) , and «Underbody Rear Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Remove the two piece propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
5. Disconnect the evaporative emission and fuel pipes (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
6. Loosen the hose clamps (1) and remove the filler pipe.
7. Support the fuel tank with a suitable jack.
8. Remove the fuel tank strap bolts (1).
9. Remove the fuel tank straps (2).
10. Disconnect the fuel tank electrical connector.
11. Remove the fuel tank (1).
12. Remove the following components if replacing just the fuel tank. Fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-fuel-pump-module-replacement) . Transfer components as necessary.

1. Install the following components if fuel tank replacement was necessary: Fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
2. Use a suitable jack and install the fuel tank (1).
3. Install the fuel tank straps (2).
4. Install the fuel tank strap bolts (1) and tighten to 20 N.m (15 lb ft).
5. Connect the fuel tank electrical connector.
6. Install the filler pipe and tighten the hose clamps (1).
7. Connect the evaporative emission and fuel pipes (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
8. Install the two piece propeller shaft. Refer to «Two-Piece Propeller Shaft Replacement»(/cadillac/ats/i-2012-2014/remont/driveshaft-universal-joints/#propeller-shaft) .
9. Install the left and right side rear air deflectors. Refer to «Underbody Rear Air Deflector Replacement - Left Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) , and «Underbody Rear Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
10. Refill the fuel tank.
11. Inspect for fuel leaks.

Fuel Tank Fuel Pump Module Replacement

Special Tools

CH 45722 Fuel Sender Lock Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools)

1. Remove the fuel tank. Refer to «Fuel Tank Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Tank Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
2. Disconnect the fuel pump electrical connector and the quick connects. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
3. Use the CH 45722 wrench by turning counter clockwise and remove the lock ring (1).
4. Disconnect the fuel pump vent hose (1) and transfer hose (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
5. Remove the fuel tank module (1) and the O-ring (2).

1. Install a NEW seal (2) and the fuel tank module (1).
2. Connect the fuel pump vent hose (1) and transfer hose (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
3. Use the CH 45722 wrench by turning clockwise and install the lock ring (1).
4. Connect the fuel pump electrical connector and the quick connects. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
5. Install the fuel tank. Refer to «Fuel Tank Replacement (LCV)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) , «Fuel Tank Replacement (LTG)»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .

Scheme 84

Fuel Pump Flow Control Module Replacement

Scheme 85

Fuel Tank Pressure Sensor Replacement

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the fuel tank filler pipe fastener (1).
3. Remove the fuel tank filler pipe clamp (2).
4. Place a clean drain pan large enough to capture the fuel that may be expelled once the hose is removed.
5. Remove the fuel tank filler pipe (3) from the fuel tank.
6. Remove the fuel tank filler pipe housing. Refer to «Fuel Tank Filler Pipe Housing Replacement»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#bolted-exterior-body-panels-and-closures) .
7. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
8. Remove the tie straps (3) attaching the evaporative emission canister purge pipe and fuel tank vent hose to the fuel tank filler pipe.
9. Remove the fuel tank filler pipe fastener (1).
10. Remove the fuel tank vent hose (2) from the fuel tank filler pipe. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
11. Remove the fuel tank filler pipe (4) from the vehicle.

1. Install the fuel tank filler pipe (4) to the vehicle.
2. Install the fuel tank vent hose (2) to the fuel tank filler pipe. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Install the fuel tank filler pipe fastener (1) and tighten to 9 (80 lb in).
4. Install NEW tie straps (3) that attach the evaporative emission canister purge pipe and fuel tank vent hose to the fuel tank filler pipe.
5. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Install the fuel tank filler pipe housing. Refer to «Fuel Tank Filler Pipe Housing Replacement»(/cadillac/ats/i-2012-2014/remont/exteriorinterior-trim/#bolted-exterior-body-panels-and-closures) .
7. Install the fuel tank filler pipe (3) to the fuel tank.
8. Install the fuel tank filler pipe clamp (2).
9. Install the fuel tank filler pipe fastener (1) and tighten to 9 (80 lb in).
10. Remove the drain pan.
11. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the fuel tank vent hose (1) from the fuel tank vent valve hose. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Disconnect the fuel tank pressure sensor electrical connector.
5. Remove the tie straps (1) attaching the fuel tank vent hose to the fuel tank filler pipe.
6. Remove the fuel tank vent hose (4) from the fuel tank filler pipe (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
7. Remove the fuel tank vent hose (4) from the retainers (3).
8. Remove the fuel tank vent hose (4) from the EVAP emission canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. If replacing hose then transfer the fuel tank pressure sensor. Refer to «Fuel Tank Pressure Sensor Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Install the fuel tank vent hose (4) to the EVAP emission canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Install the fuel tank vent hose (4) to the retainers (3).
4. Install the fuel tank vent hose (4) to the fuel tank filler pipe (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Install NEW tie straps (1) to attach the fuel tank vent hose to the fuel tank filler pipe.
6. Connect the fuel tank pressure sensor electrical connector.
7. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
8. Connect the fuel tank vent hose (1) to the fuel tank vent valve hose. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. Lower the vehicle.

Scheme 86

Fuel Level Sensor Replacement

Scheme 87

Fuel Pump Fuel Feed Hose Replacement (Flex Sensor To Pipe)

Scheme 88

Fuel Pump Fuel Feed Hose Replacement (Flex Sensor To Fuel Pump)

Scheme 89

Flexible Fuel Sensor Replacement

Scheme 90

Fuel Pressure Sensor Replacement - Fuel Feed Pipe

1. Relieve the system fuel pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Remove the fuel feed pipe (1) from the engine and retainers. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__metal-collar-quick-connect-fitting-service) .
4. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
5. Remove the underbody front air deflector right side. Refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Remove the front body exhaust heat shield right side. Refer to «Front Body Exhaust Heat Shield Replacement (Right)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Front Body Exhaust Heat Shield Replacement (Left)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
7. Remove the right side catalytic converter and exhaust. Refer to «Exhaust System Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
8. Disconnect the fuel feed pipe (1) and remove from retainers (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. Remove the fuel feed pipe (1) from the vehicle.

1. Install the fuel feed pipe (1) to the vehicle.
2. Connect the fuel feed pipe (1) and install to the retainers (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Install the right side catalytic converter and exhaust. Refer to «Exhaust System Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
4. Install the front body exhaust heat shield right side. Refer to «Front Body Exhaust Heat Shield Replacement (Right)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Front Body Exhaust Heat Shield Replacement (Left)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
5. Install the underbody front air deflector right side. Refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Lower the vehicle.
7. Install the fuel feed pipe (1) to the engine and retainers. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__metal-collar-quick-connect-fitting-service) .
8. Install the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

Scheme 91

Fuel Feed Pipe Replacement (At Engine)

Fuel System Cleaning

Note. When flushing the fuel tank, treat the fuel and water mixture as a hazardous material. Handle the material in accordance with all local, state and federal laws and regulations.

Note. Whenever the fuel tank is cleaned, inspect the fuel pump fuel strainer. If the fuel pump fuel strainer is contaminated, replace the fuel pump fuel strainer and inspect the fuel pump.

Note. Always maintain cleanliness when servicing fuel system components.

1. Remove the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-fuel-pump-module-replacement) .
2. Inspect the fuel pump inlet for dirt and debris. If dirt and debris are found, replace the fuel pump.
3. Flush fuel tank with hot water.
4. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to ensure that the removal of the water from the fuel tank is complete.
5. Allow tank to dry completely before reassembly.
6. Install the fuel tank fuel pump module. Refer to «Fuel Tank Fuel Pump Module Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-fuel-pump-module-replacement) .

Scheme 92

Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail

Fuel Injection Fuel Rail Assembly Replacement - Bank 1

Special Tools

EN-49248 Injector Rail Assembly Remover

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
4. Remove the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the fuel injection fuel rail noise shield from the fuel rails.
6. Remove the bank 1 fuel rail fasteners (1).
7. Remove the bank 2 fuel rail fasteners (1) for clearance purposes.
8. Using the EN-49248-4 hook , raise the fuel rail (1) as an assembly.
9. Once the fuel rail is free, remove the EN-49248 remover.
10. Slide the fuel rail (1) toward the rear of the engine approximately 1 inch (25.4 mm), in order to clear the center injector bore.
11. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-off-vehicle__fuel-rail-and-injectors-cleaning-and) .

1. Slide the fuel rail (1) toward the front of the engine approximately 1 inch (25.4 mm), in order to align the center injector bore.
2. Hand tighten the two outer fuel rail fasteners to seat the injectors.
3. Start and hand tighten the remaining fuel rail fasteners.
4. Tighten the fuel rail fasteners in the sequence shown above: Tighten the Bank 1 fuel rail bolts first pass to 12 N.m (106 lb in). Tighten the Bank 1 fuel rail bolts a final pass to 23 N.m (17 lb ft).
5. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
6. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
7. Install the fuel injection fuel rail noise shield to the fuel rails.
8. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
9. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
10. Install the low side fuel pressure service port cap.
11. Install the fuel tank cap.

Fuel Injection Fuel Rail Assembly Replacement - Bank 2

Special Tools

EN-49248 Injector Rail Assembly Remover

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
4. Remove the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the fuel injection fuel rail noise shield from the fuel rails.
6. Cut the plastic tie strap (1).
7. Disconnect the fuel pressure sensor electrical connector (2).
8. Remove the fuel pressure sensor (3).
9. Remove the bank 2 fuel rail fasteners (1).
10. Remove the bank 1 fuel rail fasteners (1) for clearance purposes.
11. Using the EN-49248-4 hook , raise the fuel rail (1) as an assembly.
12. Once the fuel rail is free, remove the EN-49248 special tool.
13. Slide the fuel rail (1) toward the front of the engine approximately 1 inch (25.4 mm), in order to clear the center injector bore.
14. Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-off-vehicle__fuel-rail-and-injectors-cleaning-and) .

1. Slide the fuel rail (1) toward the rear of the engine approximately 1 inch (25.4 mm), in order to align the center injector bore.
2. Hand tighten the two outer fuel rail fasteners to seat the injectors.
3. Start and hand tighten the remaining fuel rail fasteners.
4. Tighten the fuel rail fasteners in the sequence shown above: First pass 12 N.m (106 lb in). Final pass 23 N.m (17 lb ft).
5. Tighten the fuel pressure sensor (3) to 33 N.m (25 lb ft).
6. Connect the fuel pressure sensor electrical connector (2) and secure it with a new plastic zip tie.
7. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
8. Inspect for fuel leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
9. Install the fuel injection fuel rail noise shield to the fuel rails.
10. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
11. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
12. Install the low side fuel pressure service port cap.
13. Install the fuel tank cap.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Loosen the fuel feed intermediate pipe (2) from the right fuel rail (1).
4. Loosen the fuel feed intermediate pipe (2) from the left fuel rail (6).
5. Loosen the fuel feed intermediate pipe (2) from the high pressure fuel pump (5).
6. Remove the fuel feed intermediate pipe (2) from the engine. Discard the pipe.

1. Make sure that the following components are free of damage, clean and dry before installation. Replace any damaged components. Fuel feed intermediate pipe connections Right fuel rail high pressure fuel connection Left fuel rail high pressure fuel connection High pressure fuel pump high pressure fuel connection
2. Install a NEW fuel feed intermediate pipe (2) to the engine.
3. Hand tighten the fuel feed intermediate pipe (2) to the high pressure fuel pump (5).
4. Hand tighten the fuel feed intermediate pipe (2) to the left fuel rail (6).
5. Hand tighten the fuel feed intermediate pipe (2) to the right fuel rail (1).
6. Tighten all the fuel feed intermediate pipe connections. Tighten the connections first pass to 16 N.m (12 lb ft). Tighten the connections final pass to 32 N.m (24 lb ft).
7. Inspect for leaks using the following procedure: Start the engine and run the engine for 5 seconds. Turn the engine OFF, for 10 seconds. Inspect for fuel leaks.
8. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Scheme 93

Fuel Pipe Shield Replacement

Fuel Pump Replacement

Special Tools

EN-48896 High Pressure Fuel Pump Installation Alignment Gauge

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

1. Relieve the low and high side fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the thermostat housing. Refer to «Engine Coolant Thermostat Housing Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
3. Disconnect the engine wiring harness electrical connector from the high pressure fuel pump.
4. Remove the low pressure fuel feed pipe.
5. Remove the high pressure fuel feed pipe. DISCARD the pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
6. Remove and DISCARD the high pressure fuel pump bolts (1).
7. Remove the high pressure fuel pump (2).
8. Remove and discard the high pressure fuel pump O-ring (3).
9. Remove and discard the high pressure fuel pump gasket (4).
10. Remove the high pressure fuel pump roller lifter (5).

1. Use the EN-48896 alignment gauge (2) to ensure that the camshaft lobe is in the base circle position. At base circle the tool will be flush with the head (1).
2. Lubricate the high pressure fuel pump cylinder head bore with 5W30 engine oil. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__adhesives-fluids-lubricants-and-sealers) .
3. Using 5W30 engine oil, lubricate then install the high pressure fuel pump roller lifter (5).
4. Install a NEW high pressure fuel pump O-ring (3).
5. Position the NEW high pressure fuel pump gasket (4) and NEW bolts (1) to the fuel pump.
6. Install the high pressure fuel pump (2). Force will be required while HAND tightening the bolts. CAUTION: Refer to «Fastener Caution»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#dangers-warnings-and-cautions__fastener-caution) . CAUTION: Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage. CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. Start and hand-tighten the NEW high pressure fuel pump bolts (1) evenly. Tighten the high pressure fuel pump retaining bolts (1) to15 (11 lb ft).
7. Ensure the high pressure fuel pump and fuel rail fittings are clean prior to installing the NEW high pressure pipe.
8. Install a NEW high pressure fuel feed pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. Install the fuel feed pipe to the high pressure fuel pump.
10. Connect the high pressure fuel pump wiring harness.
11. Install the thermostat housing. Refer to «Engine Coolant Thermostat Housing Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/cooling-system-mechanical/#engine-cooling-system) .
12. Install the fuel tank cap.
13. Inspect for leaks using the following procedure: Turn ON the ignition, with the engine OFF for 2 seconds. Turn OFF the ignition, for 10 seconds. Turn ON the ignition, with the engine OFF. Inspect for fuel leaks.
14. Install the pressure relief cap to the fuel feed pipe.

1. Relieve the high side fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove the fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) , or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) .
3. For removal of the fuel injectors, refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-off-vehicle__fuel-rail-and-injectors-cleaning-and) .

1. Prepare the fuel injectors for assembly, refer to «Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-off-vehicle__fuel-rail-and-injectors-cleaning-and) .
2. Install the fuel injection fuel rail assembly. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) , or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-injection-fuel-rail-assembly-replacement) .
3. Pressure up the fuel system and check for leaks.

Scheme 94

Evaporative Emission Canister Purge Solenoid Valve Replacement

Scheme 95

Evaporative Emission Canister Vent Solenoid Valve Replacement

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
2. Remove the evaporative emission pipe (1) from the evaporative emission canister purge solenoid valve and retainers. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
4. Remove the underbody front air deflector right side. Refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
5. Remove the front body exhaust heat shield right side. Refer to «Front Body Exhaust Heat Shield Replacement (Right)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Front Body Exhaust Heat Shield Replacement (Left)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
6. Remove the right side catalytic converter and exhaust. Refer to «Exhaust System Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
7. Disconnect the evaporative emission pipe (1) and remove from retainers (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
8. Remove the evaporative emission pipe (1) from the vehicle.

1. Install the evaporative emission pipe (1) to the vehicle.
2. Connect the evaporative emission pipe (1) and install to the retainers (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Installthe right side catalytic converter and exhaust. Refer to «Exhaust System Replacement (LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
4. Install the front body exhaust heat shield right side. Refer to «Front Body Exhaust Heat Shield Replacement (Right)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) , «Front Body Exhaust Heat Shield Replacement (Left)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
5. Install the underbody front air deflector right side. Refer to «Underbody Front Air Deflector Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
6. Lower the vehicle.
7. Install the evaporative emission pipe (1) to the evaporative emission canister purge solenoid valve and retainers. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
8. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

Scheme 96

Evaporative Emission Canister Air Inlet Hose Replacement

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the evaporative emission canister purge pipe (1) from the fuel tank vent valve hose. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Remove the tie straps (1) attaching the evaporative emission canister purge pipe to the fuel tank filler pipe.
5. Remove the evaporative emission canister purge pipe (3) from the retainers (2).
6. Remove the evaporative emission canister purge pipe (3) from the EVAP emission canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. Install the evaporative emission canister purge pipe (3) to the EVAP emission canister. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Install the evaporative emission canister purge pipe (3) to the retainers (2).
3. Install NEW tie straps (1) to attach the evaporative emission canister purge pipe to the fuel tank filler pipe.
4. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/ats/i-2012-2014/remont/frames-subframes-crossmembers/#frame-and-underbody) .
5. Connect the evaporative emission canister purge pipe (1) to the fuel tank vent valve hose. Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
6. Lower the vehicle.

Scheme 97

Evaporative Emission Canister Replacement

Evaporative Emission System Cleaning

Special Tools

GE 41413-200 Evaporative Pressure and Purge Station

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) .

Inspection Procedure

1. Turn OFF the ignition.
2. Remove the EVAP canister purge valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Lightly tap the EVAP canister purge valve on a hard surface.
4. Inspect for carbon particles exiting either of the vacuum ports. If no carbon particles were detected, but a blockage was detected during a diagnostic procedure, install the original EVAP canister purge valve. Continue with the cleaning procedure. If carbon particles are found during the inspection procedure, continue with the cleaning procedure. If a diagnostic procedure directed you to replace the EVAP canister purge valve and no carbon particles were detected, replace the EVAP canister purge valve. Return to the published service procedure.

Cleaning Procedure

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Turn OFF the main valve on the GE 41413-200 station.
4. Disconnect the hose from the diagnostic station pressure regulator.
5. Using a section of vacuum hose, connect one end onto the EVAP pressure/purge diagnostic station pressure regulator.
6. Connect the other end of the vacuum hose to the canister side of the purge pipe.
7. Turn ON the main nitrogen cylinder valve and continue to discharge nitrogen for 15 seconds.
8. If the nitrogen does not clear the blockage, replace the purge pipe.
9. Return the EVAP pressure/purge diagnostic station to the stations original condition.
10. Install a new EVAP canister. Refer to «Evaporative Emission Canister Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
11. Lower the vehicle.
12. Install a new EVAP canister purge valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
13. Return to the diagnostic table that sent you here.

1. Ignition OFF.
2. Remove the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. If replacing the number three cylinder coil, remove the evaporative emissions canister purge solenoid valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Disconnect the ignition coil harness connectors from the ignition coils.
5. Remove the ignition coil to camshaft cover retaining bolts (1).
6. Remove the ignition coils (2) from the vehicle.

1. Install the ignition coils (2) to the vehicle.
2. Install the ignition coil to camshaft cover retaining bolts (1) and tighten to 10 N.m (89 lb in).
3. Connect the ignition coil harness connectors to the ignition coils.
4. If replacing the number three cylinder coil, install the evaporative emissions canister purge solenoid valve. Refer to «Evaporative Emission Canister Purge Solenoid Valve Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Install the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Ignition OFF.
2. Disconnect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .
3. Remove the intake manifold sight shield.
4. Remove the ignition coil harness connectors from the ignition coils.
5. Remove the ignition coil to camshaft cover retaining bolts (1).
6. Remove the ignition coils (2) from the vehicle.

1. Install the ignition coils (2) to the vehicle.
2. Install the ignition coil to camshaft cover retaining bolts (1) and tighten to 10 N.m (89 lb in)..
3. Install the ignition coil harness connectors to the ignition coils.
4. Install the intake manifold sight shield.
5. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .

Spark Plug Usage

Ensure that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to the Electronic Parts Catalog.

Spark Plug Inspection

1. Inspect the terminal post (1) for damage. Inspect for a bent or broken terminal post (1). Test for a loose terminal post (1) by twisting and pulling the post. The terminal post (1) should NOT move.
2. Inspect the insulator (2) for flashover or carbon tracking, soot. This condition is often mistakenly identified as a cracked insulator. This is caused by the electrical charge traveling across the insulator (2) between the terminal post (1) and ground. Inspect for the following conditions: Inspect the spark plug boot for damage. Inspect the spark plug recess area of the cylinder head for moisture, such as oil, coolant, or water. A spark plug boot that is saturated causes arcing to ground.
3. Inspect the insulator (2) for cracks. All or part of the electrical charge may arc through the crack instead of the electrodes (3, 4).
4. Inspect for evidence of improper arcing. Measure the gap between the center electrode (4) and the side electrode (3) terminals. This must be done carefully in order to avoid damaging the small diameter Iridium center electrode. Refer to «Ignition System Specifications»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__ignition-system-specifications) . An excessively wide electrode gap can prevent correct spark plug operation. Inspect for the correct spark plug torque. Refer to «Ignition System Specifications»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__ignition-system-specifications) . Insufficient torque can prevent correct spark plug operation. An over torqued spark plug, causes the insulator (2) to crack. Inspect for signs of tracking that occurred near the insulator tip instead of the center electrode (4). Inspect for a broken or worn side electrode (3). Inspect for a broken, worn, or loose center electrode (4) by shaking the spark plug. A rattling sound indicates internal damage. A loose center electrode (4) reduces the spark intensity. Inspect for bridged electrodes (3, 4). Deposits on the electrodes (3, 4) reduce or eliminates the gap. Inspect for worn or missing platinum pads on the electrodes (3, 4) If equipped. Inspect for excessive fouling.
5. Inspect the spark plug recess area of the cylinder head for debris. Dirty or damaged threads can cause the spark plug not to seat correctly during installation.

Spark Plug Visual Inspection

1. Normal operation-Brown to grayish-tan with small amounts of white powdery deposits are normal combustion by-products from fuels with additives. Reddish orange deposits can indicate MMT fuel additive which is still used in some markets around the world (will cause misfire and cannot be burned off). MMT fuel additive use should be avoided.
2. Carbon Fouled-Dry, fluffy black carbon, or soot caused by the following conditions: Rich fuel mixtures Leaking fuel injectors Excessive fuel pressure Restricted air filter element Incorrect combustion Reduced ignition system voltage output Weak coils Worn ignition wires Incorrect spark plug gap Excessive idling or slow speeds under light loads can keep spark plug temperatures so low that normal combustion deposits may not burn off.
3. Deposit Fouling-Oil, coolant, or additives that include substances such as silicone, very white coating, reduces the spark intensity. Most powdery deposits will not effect spark intensity unless they form into a glazing over the electrode.

Scheme 98

Spark Plug Replacement

1. Turn the ignition OFF. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. If equipped with all-wheel drive, remove the right side catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (Service-LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
3. Reposition the wiring harness heat shield to obtain access.
4. Disconnect the crankshaft position (CKP) harness connector (3) from the CKP.
5. Remove the CKP to engine block retaining bolt (1) from the CKP sensor (2).
6. Remove the CKP sensor (2) from the engine block.

1. Install the CKP sensor (2) to the engine block.
2. Install the CKP sensor to engine block retaining bolt (1) and tighten to 10 N.m (89 lb in).
3. Connect the CKP electrical connector (3) to the CKP sensor.
4. If equipped with all-wheel drive, install the right side catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (Service-LFX)»(/cadillac/ats/i-2012-2014/remont/exhaust/#engine-exhaust-system) .
5. Lower the vehicle.
6. Perform the crankshaft variation learn procedure. Refer to «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) .

1. Ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Use compressed air to remove debris from the CMP sensor and surrounding cavities.
4. Remove the CMP sensor electrical connector (1) from the CMP sensor (2).
5. Remove the CMP sensor to engine front cover retaining bolt (2).
6. Remove the CMP sensor (1) from the engine.

1. Install the CMP sensor (1) to the engine.
2. Install the CMP sensor (1) to engine front cover retaining bolt (2) and tighten to 10 (89 lb in).
3. Install the CMP sensor electrical connector (1) to the CMP sensor (2).
4. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Use compressed air to remove debris from the CMP sensor and surrounding cavities.
4. Remove the camshaft position (CMP) sensor electrical connector (1) from the CMP sensor (2).
5. Remove the CMP sensor to engine front cover retaining bolt (1).
6. Remove the CMP sensor (2) from the engine.

1. Install the CMP sensor (2) to the engine.
2. Install the CMP sensor to engine front cover retaining bolt (1) and tighten to 10 N.m (89 lb in).
3. Install the CMP sensor electrical connector (1) to the CMP sensor (2).
4. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
5. Connect the battery negative cable. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/ats/i-2012-2014/remont/body-electrical/#battery-charging-system-and-starting-system) .

1. Turn the ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Reposition the vacuum brake booster hose.
4. Use compressed air to remove debris from the CMP sensor and surrounding cavities.
5. Remove the camshaft position (CMP) sensor electrical connector (1) from the CMP sensor (2).
6. Remove the CMP sensor to engine front cover retaining bolt (1).
7. Remove the CMP sensor (2) from the engine.

1. Install the CMP sensor (2) to the engine.
2. Install the CMP sensor to engine front cover retaining bolt (1) and tighten to 10 N.m (89 lb in).
3. Install the CMP sensor electrical connector (1) to the CMP sensor (2).
4. Reposition the vacuum brake booster hose.
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Turn the ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Reposition the vacuum brake booster hose.
4. Remove the camshaft position (CMP) sensor electrical connector (1) from the CMP sensor (2).
5. Remove the CMP sensor to engine front cover retaining bolt (1).
6. Remove the CMP sensor from the engine front cover.

1. Install the CMP sensor (2) to the engine front cover.
2. Install the CMP sensor to engine front cover retaining bolt (1) and tighten to 10 (89 lb in).
3. Install the CMP sensor electrical connector (1) to the CMP sensor.
4. Reposition the vacuum brake booster hose.
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Turn the ignition OFF.
2. Remove the power brake booster auxiliary pump. Refer to «Power Brake Booster Pump Replacement (3.6L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
3. Remove the camshaft position (CMP) actuator valve electrical connector (1) from the CMP sensor (2).
4. Remove the CMP actuator solenoid valve to engine front cover retaining bolt (1).
5. Remove the CMP actuator valve (2) from the engine front cover.
6. Inspect the CMP actuator valve seal and replace as necessary.

1. Inspect the CMP actuator valve seal for damage. Replace the seal if necessary.
2. Install the CMP actuator valve (2) to the engine front cover.
3. Install the CMP actuator solenoid valve to engine front cover retaining bolt (1) and tighten to 9 N.m (80 lb in).
4. Install the CMP actuator valve electrical connector (1) to the CMP sensor (2).
5. Install the power brake booster auxiliary pump. Refer to «Power Brake Booster Pump Replacement (3.6L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .

1. Turn the ignition OFF.
2. Remove the power brake booster auxiliary pump. Refer to «Power Brake Booster Pump Replacement (3.6L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .
3. Remove the camshaft position (CMP) actuator valve electrical connector (1) from the CMP (2).
4. Remove the CMP actuator solenoid valve to engine front cover retaining bolt (1).
5. Remove the CMP actuator valve (2).
6. Inspect the CMP actuator valve seal and replace as necessary.

1. Inspect the CMP actuator valve seal for damage. Replace the seal if necessary.
2. Install the CMP actuator valve (2) to the engine front cover.
3. Install the CMP actuator solenoid valve to engine front cover retaining bolt (1). Tighten Tighten the bolt to 9 N.m (80 lb in).
4. Install the CMP valve electrical connector (1) to the CMP actuator valve.
5. Install the power brake booster auxiliary pump. Refer to «Power Brake Booster Pump Replacement (3.6L)»(/cadillac/ats/i-2012-2014/remont/mechanical-hydraulic/#hydraulic-brake-system) .

1. Turn the ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Remove the camshaft position (CMP) actuator valve electrical connector (1) from the CMP actuator (2).
4. Remove the CMP actuator solenoid valve to engine front cover retaining bolt (1).
5. Remove the CMP actuator valve (2) from the engine front cover.
6. Inspect the CMP actuator valve seal for damage and replace as necessary.

1. Inspect the CMP actuator valve seal for damage. Replace the seal if necessary.
2. Install the CMP actuator valve (2) to the engine front cover.
3. Install the CMP actuator solenoid valve to engine front cover retaining bolt (1) and tighten to 9 N.m (80 lb in).
4. Install the CMP actuator valve electrical connector (1) to the CMP actuator valve (2).
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Ignition OFF.
2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Use compressed air to remove debris from the camshaft position (CMP) actuator solenoid valve and surrounding cavities.
4. Remove the CMP actuator solenoid valve electrical connector (1) from the CMP actuator solenoid valve (2).
5. Remove the CMP actuator solenoid valve to engine front cover retaining bolt (3).
6. Remove the CMP actuator solenoid valve (2) from the engine.

1. Inspect the CMP actuator solenoid valve seal for damage. Replace the CMP actuator solenoid valve seal if necessary. Refer «Engine Front Cover Disassemble»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-off-vehicle__engine-front-cover-disassemble)
2. Install the CMP actuator solenoid valve (2) to the engine.
3. Install the CMP actuator solenoid valve to engine front cover retaining bolt (3) and tighten to 9 N.m (80 lb in).
4. Connect the CMP actuator solenoid valve electrical connector (1) to the CMP actuator solenoid valve (2).
5. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

Scheme 99

Knock Sensor Replacement - Bank 1

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/ats/i-2012-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
2. Disconnect the wiring harness retaining clip.
3. Remove the knock sensor electrical connector (3) from the knock sensor (2).
4. Remove the sensor retaining bolt (1).

1. Install the knock sensor (2) to the engine block and tighten the retaining bolt (1) to 23 N.m (17 lb ft).
2. Install the knock sensor electrical (3) connector to the KS.
3. Lower the vehicle.

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
2. Remove the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Disconnect the secondary air injection pipe (1) from the right side secondary air injection bypass valve (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
4. Disconnect the secondary air injection pipe (1) from the left side secondary air injection bypass valve (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
5. Disconnect the secondary air injection pipe (1) from the secondary air injection pump (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .

1. Reposition the secondary air injection pipe to the vehicle.
2. Connect the secondary air injection pipe (1) to the secondary air injection pump (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
3. Connect the secondary air injection pipe (1) to the left side secondary air injection bypass valve (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
4. Connect the secondary air injection pipe (1) to the right side secondary air injection bypass valve (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-20l-ltg-or-25l-lcv-repair-instructions) .
5. Install the intake manifold insulator. Refer to «Intake Manifold Insulator Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
6. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/ats/i-2012-2014/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

Scheme 100

Secondary Air Injection Pump Inlet Hose Replacement

Scheme 101

Secondary Air Injection Bypass Valve Replacement - Bank 2

Scheme 102

Secondary Air Injection Bypass Valve Replacement - Bank 1

Scheme 103

Secondary Air Injection Pump Replacement

Scheme 104

Air Cleaner Element Replacement

Scheme 105

Air Cleaner Assembly Replacement

Scheme 106

Air Cleaner Outlet Duct Replacement

Scheme 107

Intake Air Splash Shield Replacement

Fuel Sender Assembly Replacement

Special Tools

CH 45722 Fuel Sender Lock Ring Wrench

For equivalent regional tools, refer to Special Tools (Diagnostic Tools)

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Disconnect the fuel sender assembly electrical connector.
3. Use the CH 45722 wrench by turning counter clockwise and remove the lock ring (1).
4. Disconnect the fuel sender assembly transfer hose (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the fuel sender assembly (1) and the O-ring (2).

1. Install a NEW seal (2) and the fuel sender assembly (1).
2. Connect the fuel sender assembly transfer hose (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Use the CH 45722 wrench by turning clockwise and install the lock ring (1).
4. Connect the fuel sender assembly electrical connector.
5. Install the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/ats/i-2012-2014/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

See also:
• Diagnostic Trouble Code (DTC) List - Vehicle
• Diagnostic Repair Verification
• Control Module References
• Battery Negative Cable Disconnection and Connection
• Front Compartment Fuse Block Housing Replacement
• Safety Glasses Warning
• Fastener Caution
• Cooling System Draining and Filling (Static Fill)
• Cooling System Draining and Filling (GE 47716)
• Component Fastener Tightening Caution
• Heated Oxygen Sensor Resistance Learn Reset Caution
• Special Tools
• Lifting and Jacking the Vehicle
• Intake Manifold Cover Replacement
• Special Tools (Diagnostic Tools)
• Gasoline/Gasoline Vapors Warning
• Relieving Fuel Pressure Warning
• Two-Piece Propeller Shaft Replacement
• Underbody Rear Air Deflector Replacement - Left Side
• Fuel Tank Replacement (LCV)
• Fuel Tank Filler Pipe Housing Replacement
• Front Body Exhaust Heat Shield Replacement (Right)
• Fuel Rail and Injectors Cleaning and Inspection (LF1, LFW or LFX)
• Engine Coolant Thermostat Housing Replacement (LFX)
• Adhesives, Fluids, Lubricants, and Sealers
• Safety Glasses and Compressed Air Warning
• Battery Disconnect Warning
• Ignition System Specifications
• Power Brake Booster Pump Replacement (3.6L)
• Engine Front Cover Disassemble
• Intake Manifold Cover Replacement
• Engine Control Module Replacement
• Fuel Pressure Relief
• Fuel Tank Fuel Pump Module Replacement
• Metal Collar Quick Connect Fitting Service
• Fuel Injection Fuel Rail Assembly Replacement - Bank 1