2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2134
2. Observe the scan tool transmission data ignition voltage parameter. The reading should be between 12.6-15.0 V.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 Q8 control solenoid assembly harness connector at the transmission.
2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuits listed below and ground.
* Terminal 4
* Terminal 12
瀚慖f the test lamp does not illuminate, test the ignition circuit for a Short to Ground or an Open/High Resistance.
3. If all circuits test normal, replace the Q8 control solenoid valve assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,
and programming.
P0564
DTC P0564, P0567, or P0568
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 P0564
- Cruise Control Multifunction Switch Circuit
DTC P0567
- Cruise Control Resume Switch Circuit
DTC P0568
- Cruise Control Set Switch Circuit
Diagnostic Fault Information
Circuit/System Description
The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate
and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function.
The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The BCM sends a serial data
message to the ECM indicating the status of the cruise control switches.
Conditions for Running the DTC
* The ignition is ON.
* The cruise switch is ON.
