2010 Cadillac Truck SRX FWD V6-3.0L Page 213

2010 Cadillac Truck SRX FWD V6-3.0L Page 213

Repair Instructions

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

* Radio Antenna Base Replacement (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service and Repair/Radio Antenna

Base Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for radio replacement, setup, and programming

B128D

DTC B128D

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 B128D 62

- Video Display Position Signal Stuck Open

DTC B128D 63

- Video Display Position Signal Stuck Closed

Diagnostic Fault Information

Circuit/System Description

The radio controls the position of the Radio/Navigation Display via the position control circuit. When the UP position is desired, the radio sends a

voltage signal to the Radio/Navigation Display actuator on the position control circuit, which commands the Radio/Navigation Display actuator to

raise the display. When the display reaches the fully raised position, the actuator controller sends a voltage signal to the radio on the position signal

circuit. When commanded up and fully raised, the voltage values on the control and position signal circuits will typically be greater than 4 V.

To lower the display, the radio removes the voltage signal on the position control circuit, which commands the Radio/Navigation Display actuator

to lower the display. When the display reaches the fully lowered position, the actuator controller remove the voltage signal to the radio on the

position signal circuit. When commanded down and fully lowered, the voltage values on the control and position signal circuits will be less than 1

V.

The display automatically returns to the lowered position when the ignition is turned OFF. When the ignition is turned ON, the radio commands the

display to return to it's previous position, raised or lowered, that was commanded during the previous ignition cycle.

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC