2010 Cadillac Truck SRX AWD 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.
