The Instrumentation Control Unit (ICU) and Fault Codes
Note: NOTE: Some non-critical faults may be suppressed and will not appear during an instrumentation control unit (ICU) self-check.
The majority of electrical and electronic issues on the vehicle will have an associated fault code, which will be displayed on the ICU.
If the ICU receives active fault codes during the ICU self-check, it displays them one after the other until the parking brake is released or the keyswitch is turned off. Once the parking brake is completely released, the ICU displays alerts until acknowledged. If there are no active faults, the ICU displays the home screen after the self-check completes.
When there is an active vehicle fault code, a popup appears on the ICU message screen. See Table. for a list of Acronyms used in fault codes for the ICU.
Table 1, ICU Electronic Control Unit Acronyms
|
ICU Electronic Control Unit Acronyms |
|||
|---|---|---|---|
|
ABS |
Antilock Brake System |
EHPS |
Electro-Hydraulic Power Steering |
|
BMS# |
Battery Management System There can be up to nine battery management systems: BMS1, BMS2, . . . BMS9. |
ETCM |
Electronic Transmission Control Module |
|
CGW |
Central Gateway |
HVCF |
Heating/Ventilation/AC Front (HVAC) |
|
DBC |
Direct Current Box |
ICU |
Instrumentation Control Unit |
|
DCL |
DC/DC Converter |
RDF |
Radar Front End |
|
DCMD |
Door Control Module, Driver |
SAS |
Steering Angle Sensor |
|
DCMP |
Door Control Module, Passenger |
SAM |
Signal Detect and Actuation Module |
|
EAPU |
Electronic Air Processing Unit |
TPMS |
Tire Pressure Monitoring System |
|
ECPC |
Electronic Common Powertrain Controller |
VRDU |
Video Radar Decision Unit |