Engine Controls/fuel - 3.6l (Lfx) - Repair Instructions Cadillac SRX II рестайлинг

Calibration Criteria

Note. Do not apply the brake pedal during the brake pedal position sensor calibration procedure. Any movement of the brake pedal during this procedure will cause the calibration procedure to fail. If this occurs, the brake pedal position sensor calibration must be repeated.

Brake pedal position sensor calibration must be performed after the brake pedal position sensor, body control module (BCM), or engine control module (ECM) have been serviced. The calibration procedure will set the brake pedal position sensor home value. This value is used by the BCM and ECM to determine the action of the driver applying the brake system and to provide this information to the vehicle subsystems via serial data.

Calibration Procedure

1. Apply the parking brake.
2. Ignition ON, engine OFF, place the transmission in the PARK position for automatic transmission or NEUTRAL position for manual transmission.
3. Install a scan tool.
4. Clear all DTCs before proceeding.
5. Navigate to the Configuration/Reset Functions menu of the BCM.
6. Select the Brake Pedal Position Sensor Learn procedure and follow the directions displayed on the screen.
7. Navigate to the Configuration/Reset Functions menu of the ECM.
8. Select the Learn Functions menu.
9. Select the Brake Pedal Position Sensor Learn procedure and follow the directions displayed on the screen.

Crankshaft Position System Variation Learn

Note. The Crankshaft Position System Variation Learn procedure is also required when the following service procedures have been performed, regardless of whether DTC P0315 is set: An engine replacement A engine control module (ECM) or body control module (BCM) replacement A crankshaft balancer replacement A crankshaft removal and/or replacement A crankshaft position sensor disturbance/removal and/or replacement Any engine repairs which disturb the crankshaft to crankshaft position sensor relationship.

Note. The ECM monitors certain component signals to determine if all the conditions are met to continue with the crankshaft position System Variation Learn Procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool displays the signals of the following components: Crankshaft position sensors activity-If there is a crankshaft position sensor condition, refer to the applicable DTC that set. Camshaft position sensor signal activity-If there is a camshaft position sensor signal condition, refer to the applicable DTC that set. 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.

Note. The ECM monitors certain component signals to determine if all the conditions are met to continue with the Crankshaft Position Variation Learn procedure.

1. Ignition ON, observe the DTC information with a scan tool. Verify no other DTCs are set, except DTCs P0300-P0306, or P0315. If DTCs are set, except DTCs P0300-P0306, or P0315, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/srx/ii-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for further diagnosis.
2. Select the Crankshaft Position Variation Learn Procedure with a scan tool and follow the on screen instructions
3. Verify DTC P0315 does not set. If DTC P0315 set, or another DTC is present refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/srx/ii-2012-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) for the applicable DTC that set. If the DTC does not set
4. All OK.

Scheme 1

Engine Control Module 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 2

Engine Coolant Temperature Sensor Replacement

Scheme 3

Mass Airflow Sensor with Intake Air Temperature Sensor Replacement

Scheme 4

Manifold Absolute Pressure Sensor Replacement

Scheme 5

Heated Oxygen Sensor Replacement - Bank 1 Sensor 1

Scheme 6

Heated Oxygen Sensor Replacement - Bank 1 Sensor 2

Scheme 7

Heated Oxygen Sensor Replacement - Bank 2 Sensor 1

Scheme 8

Heated Oxygen Sensor Replacement - Bank 2 Sensor 2

Scheme 9

Accelerator Pedal with Position Sensor Assembly Replacement

Scheme 10

Throttle Body Assembly Replacement

Throttle Body Inspection and Cleaning

Note. Over extended time and mileage, deposits may accumulate on the back of the throttle valve plate. Typically these deposits pose no problem. Occasionally the deposit may accumulate to a point where perceived pedal effort or throttle valve movement is effected.

1. Remove the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Inspect the throttle body bore and the throttle valve plate for deposits. You will need to open the throttle valve in order to inspect all surfaces.
3. Clean the throttle body bore and the throttle valve plate using a clean shop towel with GM Top Engine Cleaner. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__adhesives-fluids-lubricants-and-sealers) .
4. Install the air cleaner outlet duct. Refer to «Air Cleaner Outlet Duct Replacement»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Fuel Pressure Relief

1. Remove the fuel pump 20A fuse from the X53A fuse block - rear body label. Refer to «Electrical Center Identification Views»(/cadillac/srx/ii-2012-2016/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
2. Start the vehicle and allow the engine to idle until the engine stops. The engine will stop in approximately 20-30 seconds.
3. Turn the ignition OFF.

Special Tools

CH 48027 Digital Pressure Gauge

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

Installation Procedure

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
3. Connect the CH 48027 gauge (1) to the CH 48027 adapter (2).
4. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
5. Perform any tests and/or diagnostics as needed. For the proper usage of the CH 48027 gauge (1), refer to the manufacture's directions.

Removal Procedure

1. Relieve the fuel system pressure, if required. Perform the following steps: 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. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
7. Tighten the fuel fill cap.

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) , Special Tools (Repair Tools) .

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/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.

1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Using compressed air, blow any dirt out of the quick-connect fitting.
3. This step applies to Bartholomew style connectors ONLY. Squeeze the plastic quick-connect fitting release tabs.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.
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. 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.

Scheme 11

Fuel Filter Replacement (China)

Fuel Tank Draining

Special Tools

CH-45004 Fuel Tank Drain Hose

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

1. Remove the fuel fill cap.
2. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/srx/ii-2012-2016/remont/hoistjack/#general-information) .
3. Loosen the fuel fill pipe hose clamps and slide the fill pipe hose up the filler pipe.
4. Insert the CH-45004 fuel tank drain hose into the fuel tank until the hose reaches the bottom of the fuel tank.
5. Use an hand or air operated pump device in order to drain as much fuel as possible.

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Drain the fuel tank. Refer to «Fuel Tank Draining»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-draining) .
3. Remove the exhaust system. Refer to «Exhaust Muffler Replacement»(/cadillac/srx/ii-2012-2016/remont/exhaust/#engine-exhaust-system) .
4. If required, remove the propeller shaft. Refer to «Propeller Shaft Replacement»(/cadillac/srx/ii-2012-2016/remont/driveshaft-universal-joints/#propeller-shaft) .
5. Disconnect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
6. Loosen the upper fill pipe clamp and hose clamp (2) and slide the hose up the filler pipe.
7. Disconnect the fuel tank electrical connector (1).
8. Disconnect the fuel line and evaporative emission line connectors (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. Disconnect the evaporative emission line (1) from the canister.
10. Support the fuel tank with a suitable jack.
11. Remove the fuel tank strap bolts (1) and reposition the straps (2) downward toward the front of the vehicle.
12. Using a suitable jack, lower the fuel tank (3).
13. Remove the following components if replacing just the fuel tank: The primary fuel tank module-Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) . The secondary fuel tank module-Refer to «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. Install the following components if fuel tank replacement was necessary: The primary fuel tank module-Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) . The secondary fuel tank module-Refer to «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Raise the fuel tank (3) to the vehicle.
3. Ensure the fuel tank straps are seated properly. Install the fuel tank straps (2) and bolts (1) then tighten to 45 N.m(33 lb ft).
4. Connect the evaporative emission line (1) to the canister.
5. Connect the fuel tank electrical connector (1).
6. Connect the fuel line and evaporative emission line connectors (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
7. Connect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
8. Install the filler tube and tighten the hose both clamp (2) to 5 N.m(44 lb in).
9. Perform a leak down test. Refer to «Evaporative Emission System Diagnosis»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-dtc-p0420-to-dtc-p2635-and-diagnostic-information-and-procedures) .
10. If required, install the propeller shaft. Refer to «Propeller Shaft Replacement»(/cadillac/srx/ii-2012-2016/remont/driveshaft-universal-joints/#propeller-shaft) .
11. Install the exhaust system. Refer to «Exhaust Muffler Replacement»(/cadillac/srx/ii-2012-2016/remont/exhaust/#engine-exhaust-system) .
12. Refill the fuel tank.
13. Inspect for fuel leaks.

Scheme 12

Fuel Pump Power Control Module Replacement

Scheme 13

Fuel Pump Flow Control Module Replacement

Scheme 14

Fuel Tank Pressure Sensor Replacement

1. Drain the fuel tank if necessary. Refer to «Fuel Tank Draining»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-tank-draining)
2. Remove the housing fasteners (1).
3. Remove the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/srx/ii-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .
4. Disconnect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the lower filler tube fastener (3).
6. Loosen the filler pipe hose clamp (2) and disconnect the hose.
7. Remove the upper filler tube fastener (3).
8. Remove the filler pipe (4).

1. Position the filler pipe (4) in place and hand tighten the center nut (3).
2. Install the filler pipe hose and tighten the clamp (2) to 5 N.m(44 lb in).
3. Start and hand tighten the lower filler pipe fastener (3).
4. Connect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Tighten the fasteners (3) to 10 N.m(89 lb in).
6. Install the housing fasteners (1) and tighten to 10 N.m(89 lb in).
7. Install the right rear wheelhouse panel liner. Refer to «Rear Wheelhouse Liner Replacement»(/cadillac/srx/ii-2012-2016/remont/frames-subframes-crossmembers/#frame-and-underbody) .

J-45722 Fuel Tank Sender Wrench

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

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Disconnect the electrical connectors (1) from the primary and secondary fuel tank modules.
3. Disconnect the fuel and evaporative emission lines (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Remove the secondary fuel pump module. Refer to «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Using the J-45722 wrench, remove the cam lock ring (1) by turning counterclockwise.
6. Remove the primary fuel tank module (1) and the O-ring (2).
7. If replacing the fuel pump module only, remove the primary fuel level sensor. Refer to «Fuel Tank Fuel Pump Module Fuel Level Sensor Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. If replacing the fuel pump module only, install the primary fuel level sensor. Refer to «Fuel Tank Fuel Pump Module Fuel Level Sensor Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Install a NEW O-ring (2) and the primary fuel tank module (1).
3. Using the J-45722 wrench, install the cam lock ring (1) by turning clockwise.
4. Install the secondary fuel pump module. Refer to «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Connect the electrical connectors (1) to the primary and secondary fuel tank modules.
6. Connect the fuel and evaporative emission lines (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
7. Install the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

CH 48482 Fuel Tank Sender Wrench

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

1. Remove the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Disconnect the electrical connector (1).
3. Disconnect the evaporative emission line (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Using the CH 48482 wrench , remove the cam lock ring (1) by turning counterclockwise.
5. Partially raise the secondary fuel pump module and disconnect the crossover tube (1) by pulling back the plastic retaining tab (2).
6. Disconnect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
7. Remove the secondary fuel tank module (1) and the O-ring (2).

1. Install a NEW O-ring (2) and the primary fuel tank module (1).
2. Partially install the secondary fuel pump module and connect the crossover tube (1).
3. Connect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Using the CH 48482 wrench, install the cam lock ring (1) by turning clockwise.
5. Connect the electrical connector (1).
6. Connect the evaporative emission line (2). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
7. Install the fuel tank. Refer to «Fuel Tank Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. Remove the primary fuel tank module. Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Using two flat-bladed tools, carefully pull both locking tabs (1) outward while simultaneously lifting the level sensor.
3. Using a small, flat-bladed tool, release the retaining tabs (1) while simultaneously pulling the electrical terminals out of the housing.

1. Push in the electrical terminals (1) and ensure the terminals are secure.
2. Carefully insert the level sensor until the locking tabs (1) snap into the locking position.
3. Install the primary fuel tank module. Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

1. Disconnect the fuel feed line (1). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Disengage the fuel feed line (1) from the plastic retainer (2).
3. Remove the fuel pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Disconnect the fuel feed line quick connect (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Disengage the fuel feed line (3) from the plastic retainers (2) and remove the fuel feed line.

1. Install the fuel feed line (3) into the plastic retainers (2).
2. Connect the fuel feed line quick connect (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Install the fuel pressure sensor. Refer to «Fuel Pressure Sensor Replacement - Fuel Feed Pipe»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Engage the fuel feed line (1) to the plastic retainer (2).
5. Connect the fuel feed line (1). Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Scheme 15

Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Rear Pipe)

Scheme 16

Fuel Feed Hose Replacement (Flex Sensor to Fuel Feed Front Pipe)

Scheme 17

Flexible Fuel Sensor Replacement

Scheme 18

Fuel Pressure Sensor Replacement - Fuel Feed Pipe

Scheme 19

Fuel Feed Pipe Replacement (Engine)

Fuel System Cleaning

The following procedure covers the disassembly and the inspection of the complete fuel supply system. If the fuel system is contaminated, the fuel system can be cleaned. You can usually determine the extent of the fuel system contamination during the disassembly.

1. If required, remove the fuel filter. Refer to «Fuel Filter Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Inspect the fuel system for contamination of the in-line fuel filter. Replace the filter after cleaning the fuel lines if the filter is plugged or contaminated.
3. Remove the fuel module assemblies. Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Locate the tank in a suitable work area away from any heat, any flame, or any other source of ignition.
5. Perform the following procedures: Inspect the fuel sender strainer. Replace the primary fuel tank module if the strainer is contaminated. Inspect the secondary fuel tank module for debris. Clean the secondary fuel tank module if debris is found. WARNING: Wear safety glasses when using compressed air, as flying dirt particles may cause eye injury. Use compressed air in order to apply air pressure to the transfer tube.
6. Flush the fuel tank with running hot water for at least five minutes. Pour the water out of the fuel sender assembly opening. Rock the tank in order to ensure that the removal of the water from the tank is complete.
7. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) in order to disconnect the following quick connect fittings from the fuel rail: The feed hose/pipe The return hose/pipe
8. Use compressed air in order to apply air pressure to the fuel lines in the opposite direction from the normal fuel flow.
9. Remove the fuel injectors and fuel rail. Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
10. Clean and inspect the fuel injectors and fuel rail.

Assemble the fuel system as follows

1. Install the fuel injectors and fuel rail. Refer to Refer to «Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Install the fuel module assemblies. Refer to «Primary Fuel Tank Module Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and «Secondary Fuel Tank Module Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. If required, install the fuel filter. Refer to «Fuel Filter Replacement (China)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Refer to «Metal Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) in order to connect the following quick connect fittings to the fuel rail: The feed hose/pipe The return hose/pipe

Scheme 20

Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail

Scheme 21

Fuel Pressure Sensor Replacement (NT7, NU5)

EN-49248 Injector Rail Assembly Remover

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

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the foam insulator 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. Disconnect the bank 2 fuel injector and fuel pressure sensor electrical connections.
15. Once the fuel rail is removed, clean and inspect the fuel injectors. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LFW or LFX)»(/cadillac/srx/ii-2012-2016/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 (25 lb ft)
6. Connect the fuel pressure sensor electrical connector (2) and secure it with a new plastic zip tie.
7. Connect the bank 1 fuel injector electrical connections.
8. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. 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.
10. Install the foam insulator to the fuel rails.
11. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
12. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
13. Install the low side fuel pressure service port cap.
14. Install the fuel tank cap.

EN-49248 Injector Rail Assembly Remover

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

1. Relieve the fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the foam insulator 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. Disconnect the bank 2 fuel injector and fuel pressure sensor electrical connections.
15. Once the fuel rail is removed, remove the injectors to clean and inspect. Refer to «Fuel Rail and Injectors Cleaning and Inspection (LFW or LFX)»(/cadillac/srx/ii-2012-2016/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 (25 lb ft).
6. Connect the fuel pressure sensor electrical connector (2) and secure it with a new plastic zip tie.
7. Connect the bank 1 fuel injector electrical connections
8. Install the fuel feed intermediate pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
9. 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.
10. Install the foam insulator to the fuel rails.
11. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
12. Install the fuel pipe shield. Refer to «Fuel Pipe Shield Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
13. Install the low side fuel pressure service port cap.
14. Install the fuel tank cap.

Scheme 22

Fuel Feed Intermediate Pipe Replacement

Scheme 23

Fuel Pipe Shield Replacement

EN-48896 High Pressure Fuel Pump Installation Alignment Gauge

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

1. Relieve the low and high side fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions__fuel-pressure-relief) .
2. Remove thermostat housing. Refer to «Engine Coolant Thermostat Replacement (LFW,LFX)»(/cadillac/srx/ii-2012-2016/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 feed pipe. Discard the pipe. Refer to «Fuel Feed Pipe Replacement (Engine)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
5. Remove the high pressure pipe. Discard the pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/srx/ii-2012-2016/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 to ensure that the camshaft lobe is in the base circle position. At base circle the tool will be flush with the head.
2. Lubricate the high pressure fuel pump cylinder head bore and roller lifter with camshaft prelube. Refer to «Adhesives, Fluids, Lubricants, and Sealers»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__adhesives-fluids-lubricants-and-sealers) .
3. 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 bolts (1) to the fuel pump.
6. Install the high pressure fuel pump (2). Force will be required while hand tightening the bolts.
7. Tighten the high pressure fuel pump retaining bolts to 15 N.m (11 lb ft).
8. Ensure the high pressure fuel pump and fuel rail fittings are clean prior to assembly.
9. Install a NEW high pressure fuel pipe. Refer to «Fuel Feed Intermediate Pipe Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
10. Install a NEW fuel feed pipe to the high pressure fuel pump. Refer to «Fuel Feed Pipe Replacement (Engine)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
11. Connect the high pressure fuel pump wiring harness.
12. Install the thermostat housing. Refer to «Engine Coolant Thermostat Replacement (LFW,LFX)»(/cadillac/srx/ii-2012-2016/remont/cooling-system-mechanical/#engine-cooling-system) .
13. Install the fuel tank cap.
14. 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.
15. Install the pressure relief cap to the fuel feed pipe.

1. Relieve the high side fuel system pressure. Refer to «Fuel Pressure Relief»(/cadillac/srx/ii-2012-2016/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 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. For removal of the fuel injectors, refer to «Fuel Rail and Injectors Cleaning and Inspection (LFW or LFX)»(/cadillac/srx/ii-2012-2016/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 (LFW or LFX)»(/cadillac/srx/ii-2012-2016/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 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , or «Fuel Injection Fuel Rail Assembly Replacement - Bank 2 (LF1, LFW)»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Pressure up the fuel system and check for leaks.

Scheme 24

Evaporative Emission Canister Purge Solenoid Valve Replacement

Scheme 25

Evaporative Emission Canister Vent Solenoid Valve Replacement (NT7, NU5)

1. Disconnect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Disengage the evaporative emission line (1) from the plastic retainer (2).
3. Disconnect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Disengage the evaporative emission line (1) from the plastic retainers (2) and remove the evaporative emission line.

1. Install the evaporative emission line (1) into the plastic retainers (2).
2. Connect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Engage the evaporative emission line (1) to the plastic retainer (2).
4. Connect the evaporative emission line (1). Refer to «Plastic Collar Quick Connect Fitting Service»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Scheme 26

Evaporative Emission Rear Pipe Replacement

Scheme 27

Evaporative Emission Canister Purge Tube Replacement

Scheme 28

Evaporative Emission Canister Air Inlet Hose Replacement

Scheme 29

Evaporative Emission Canister Replacement (NT7, NU5)

GE 41413-200 Evaporative Pressure and Purge Station

For equivalent regional tools, refer to Special Tools (Diagnostic Tools) , Special Tools (Repair 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/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/hoistjack/#general-information) .
2. Remove the EVAP canister. Refer to «Evaporative Emission Canister Replacement (NT7, NU5)»(/cadillac/srx/ii-2012-2016/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 (NT7, NU5)»(/cadillac/srx/ii-2012-2016/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/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
13. Return to the diagnostic table that sent you here.

1. Remove the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
2. Disconnect the engine wiring harness electrical connector(s) (1) from the ignition coil(s) (4).
3. Remove the ignition coil bolt(s).
4. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s). Tighten Tighten the bolt(s) to 10 N.m (89 lb in).
3. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s) (4).
4. Install the intake manifold. Refer to «Intake Manifold Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

1. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .
2. Disconnect the engine wiring harness electrical connector(s) (5) from the ignition coil(s) (4).
3. Remove the ignition coil bolt(s).
4. Remove the ignition coil(s).

1. Install the ignition coil(s).
2. Install the ignition coil bolt(s). Tighten Tighten the bolt(s) to 10 N.m (89 lb in).
3. Connect the engine wiring harness electrical connector(s) (5) to the ignition coil(s) (4).
4. Install the intake manifold cover . Refer to «Intake Manifold Cover Replacement»(/cadillac/srx/ii-2012-2016/remont/mechanical/#engine-mechanical-36l-lfx-repair-instructions-on-vehicle) .

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/srx/ii-2012-2016/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/srx/ii-2012-2016/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.

1. Remove the ignition coil(s). Refer to «Ignition Coil Replacement - Bank 1»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and/or «Ignition Coil Replacement - Bank 2»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Use compressed air in order to remove debris from the spark plug cavity.
3. Remove the spark plug.

1. Ensure that the spark plug gap is equivalent to the spark plug gap specification. Refer to «Ignition System Specifications»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-specifications__ignition-system-specifications) .
2. Install the spark plug and tighten to 18 N.m (13 lb ft).
3. Install the ignition coil(s). Refer to «Ignition Coil Replacement - Bank 1»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) , and/or «Ignition Coil Replacement - Bank 2»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Scheme 30

Crankshaft Position Sensor Replacement (FWD)

Scheme 31

Crankshaft Position Sensor Replacement (AWD)

Scheme 32

Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust

Scheme 33

Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake

Scheme 34

Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust

Scheme 35

Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake

Scheme 36

Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Intake

Scheme 37

Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 1 (Right Side) Exhaust

Scheme 38

Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Intake

Scheme 39

Camshaft Position Actuator Solenoid Valve Solenoid Replacement - Bank 2 (Left Side) Exhaust

Scheme 40

Knock Sensor Replacement - Bank 1

Scheme 41

Knock Sensor Replacement - Bank 2

Scheme 42

Air Cleaner Element Replacement

Scheme 43

Air Cleaner Assembly Replacement

1. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
2. Remove the air cleaner element. Refer to «Air Cleaner Element Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
3. Remove the air cleaner inlet duct (1) from the locking tabs (2).
4. Remove the air cleaner inlet duct (1) from the air cleaner assembly.

1. Install the air cleaner inlet duct (1) to the air cleaner assembly.
2. Install the air cleaner inlet duct (1) to the locking tabs (2).
3. Install the air cleaner element. Refer to «Air Cleaner Element Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .
4. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(/cadillac/srx/ii-2012-2016/remont/testing-diagnostics/#engine-controlsfuel-36l-lfx-repair-instructions) .

Scheme 44

Air Cleaner Outlet Duct Replacement

See also:
• Diagnostic Trouble Code (DTC) List - Vehicle
• Electrical Center Identification Views
• Battery Negative Cable Disconnection and Connection
• K20 Engine Control Module: Programming and Setup
• Cooling System Draining and Filling (Static Fill LF1)
• Fastener Caution
• Intake Manifold Cover Replacement
• Lifting and Jacking the Vehicle
• Drivetrain and Front Suspension Frame Replacement
• Heated Oxygen and Oxygen Sensor Caution
• Adhesives, Fluids, Lubricants, and Sealers
• Special Tools (Diagnostic Tools)
• Special Tools (Repair Tools)
• Gasoline/Gasoline Vapors Warning
• Relieving Fuel Pressure Warning
• Exhaust Muffler Replacement
• Propeller Shaft Replacement
• Evaporative Emission System Diagnosis
• Body Side Trim Panel Replacement
• Control Module References
• Fuel Rail and Injectors Cleaning and Inspection (LFW or LFX)
• Ignition System Specifications
• Safety Glasses and Compressed Air Warning
• Transmission Brace Replacement
• Air Cleaner Outlet Duct Replacement
• Fuel Pressure Relief
• Fuel Tank Draining
• Crankshaft Position System Variation Learn