Subaru 602 - Monitoring of Trouble in the System

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June 2013
Electrical Systems Operation & Diagnosis Module (602)
Monitoring of Trouble in the System
The control modules in the LAN system monitor the communication data between them. When a
control module detects an error in the data it immediately transmits an error flag to notify the error
to all the other modules of the LAN. This prevents reception of messages with an error by the other
modules. When the trouble is detected in the system, the Body Integrated Unit transmits trouble
information to the Combination Meter and displays it on the Trip Meter. (Applicable models only.)
ER IU
The Combination Meter will display the LAN system codes any time the ignition is on and in case
of multiple codes the display is determined by priority listed below:
- High Speed CAN
- Low Speed CAN
- Body Integrated Unit
- ECM
- TCM
- VDC/ABS
- Vehicle Speed
CAN Trouble Codes
Er-- High speed and low speed CAN communication error at the same time
Er HC High speed CAN communication error
Er LC Low speed CAN communication error
Er IU No data or irregular data received from the Body Integrated unit
Er EG Engine Control Module or CAN communication error
Er TC Transmission Control Module or CAN communication error
Er Ab ABS/VDC Control Module or CAN communication error
Er SP Irregular vehicle speed signal (ABS/VDC Diagnostic Code Information)
CAN data vehicle speed – Pulse input vehicle speed >=15 km/h
Er SS Irregular vehicle speed signal (Wheel Speed Signal error)
Pulse input vehicle speed –CAN data vehicle speed >=15 km/h
Er Pd Power Window Control Module or CAN communication error
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