2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 477
* Outside Rearview Mirror Motor Replacement (See: Body and Frame/Mirrors/Power Mirror Motor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for DDM or PDM replacement, setup, and
programming
B1590
DTC B1580 or B1590
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 B1580 00
- Mirror Horizontal Position Sensor Circuit
DTC B1590 00
- Mirror Vertical Position Sensor Circuit
Diagnostic Fault Information
Circuit/System Description
The Driver Door Module (DDM) and Passenger Door Module (PDM) determine the position of the outside rearview mirrors based on inputs from
two mirror position sensors, one for vertical position, the other for horizontal position. Five volts is applied to each sensor through a shared 5-volt
reference circuit and a shared low reference circuit supplies ground. Each sensor has an individual signal circuit which provides position voltage to
the DDM/PDM.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
B1580
An improper voltage level is seen on the Driver/Passenger Mirror Horizontal Position Sensor Signal circuit.
B1590
An improper voltage level is seen on the Driver/Passenger Mirror Vertical Position Sensor Signal circuit.
Action Taken When the DTC Sets
Memory mirror recall functions are suspended as long as the fault is present.
Conditions for Clearing the DTC
* A current DTC will clear when the fault is no longer present.
* A history DTC will clear after 40 fault free ignition cycles.
