2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 950
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Power Steering Wiring Harness Extension Harness Replacement (HP2) ()
* Steering Gear Replacement (Hydraulic Rack and Pinion) (See: Steering and Suspension/Steering/Steering Gear)Steering Gear Replacement
(Recirculating Ball Without LMM) (See: Steering and Suspension/Steering/Steering Gear)Steering Gear Replacement (Two Mode Hybrid)
(See: Steering and Suspension/Steering/Steering Gear)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for PSCM replacement, setup, and programming
Data Communications
DTC C0550
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 C0550 00
- Electronic Control Unit (ECU) Performance
DTC C0550 31
- Electronic Control Unit (ECU) Performance
DTC C0550 32
- ECU Performance General Memory Failure
DTC C0550 34
- ECU Malfunction RAM Failure
DTC C0550 35
- ECU Malfunction ROM Failure
DTC C0550 36
- ECU Malfunction EEPROM Failure
DTC C0550 37
- ECU Malfunction Watch Dog failure
DTC C0550 38
- ECU Performance Supervision Software Failure
DTC C0550 39
- ECU Performance Internal Electronic Failure/Discard
DTC C0550 4B
- ECU Internal Fault
Circuit/System Description
When the ignition is turned ON, the microprocessor runs a diagnostic program to detect an internal fault when power up is commanded. If an
internal malfunction is detected, the control module will store a DTC C0550 in its memory.
Conditions for Running the DTC
The microprocessor runs a diagnostic program to detect an internal fault when power up is commanded. The only requirements are voltage and
ground.
Conditions for Setting the DTC
* The control module detects an internal write malfunction.
