Saturday, November 27, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 1031

2010 Cadillac Truck SRX FWD V6-3.0L Page 1031



2. Connect a test lamp between the control circuit terminal A and ground.



3. Ignition ON, command the ECM fuel pump enable command ON and OFF with a scan tool. The test lamp should turn ON and OFF, when



changing between the commanded states.



瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel pump control



module.



瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace



the K27 fuel pump control module.



4. Ignition OFF, connect a test lamp between the control circuit terminal A and the low reference circuit terminal B.



5. Ignition ON, command the ECM fuel pump enable command ON with a scan tool. The test lamp should illuminate.



瀚慖f the test lamp does not illuminate, test the low reference circuit terminal B for a short to voltage or an open/high resistance. If the circuit



tests normal, replace the K27 fuel pump control module.



6. If all circuits test normal, replace the G12 fuel pump.



Repair Instructions



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



* Fuel Pump Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service and Repair/Fuel Pump



Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for fuel pump control module replacement, setup,



and programming



P0024



DTC P0011, P0014, P0021, or P0024 (LF1, LFW)



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC P0011



- Intake Camshaft Position System Performance Bank 1



DTC P0014



- Exhaust Camshaft Position System Performance Bank 1



DTC P0021



- Intake Camshaft Position System Performance Bank 2



DTC P0024



- Exhaust Camshaft Position System Performance Bank 2



Circuit/System Description



The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is



operating. The camshaft position actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position



actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the



retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.



Conditions for Running the DTC



* DTC P0010, P0013, P0020, P0023, P0016, P0017, P0018, P0019, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, and



P0391 is not set.



* The ignition voltage is greater than 11 V.



* The engine is operating.



* The desired camshaft position is not changing greater than 4.5 degrees for at least 1 s.



* Both of the desired and actual camshaft position actuator values cannot be greater than 20 degrees or less than 5 degrees.



* DTCs P0011, P0014, P0021, and P0024 run continuously once the above conditions are met.

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