Subaru 2009 IMPREZA Service Manual page 867

Diagnostic Trouble Code (DTC) Detecting Criteria
BY:DTC P0600 SERIAL COMMUNICATION LINK
1. OUTLINE OF DIAGNOSIS
Detect malfunction of CAN communication.
When CAN communications is not possible, and CAN communications with TCM is not possible, judge as
NG if data from the TCM is not normal.
2. COMPONENT DESCRIPTION
ECM and TCM are connected by high speed CAN.
(Common Specifications)
CAN Protocol 2.0 B (Active)
Frame Format: 11 Bit ID Frame (Standard Frame)
(High speed CAN)
Conforms to ISO11898
Communication Speed: 500 kbps
3. ENABLE CONDITIONS
Secondary Parameters
None
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after starting the engine.
5. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
Judgement Value
Malfunction Criteria
Battery voltage
Starter switch
Engine
bus off flag or error warning flag
or
ID received from control module con-
nected to driving system CAN
or
Data updated from control module con-
nected to driving system CAN
Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Enable Conditions
Threshold Value
> 10.9 V
OFF
run
set (error)
None during 500 milli-
seconds
None during 500 milli-
seconds
GD(H4SO)-143
GENERAL DESCRIPTION