IS 250C V6-2.5L (4GR-FSE) (2011)
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Information Bus: Initial Inspection and Diagnostic Overview
Diagnosis System
NETWORKING: LIN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM
1. DESCRIPTION
The certification ECU (smart key ECU assembly) controls the LIN communication system. LIN communication system data and Diagnostic
Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).
When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
2. CHECK DLC3
(a) Check the DLC3 .
3. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
How To Proceed With Troubleshooting
NETWORKING: LIN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HINT
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Use the following procedure to troubleshoot the LIN communication system.
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*: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS
HINT
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In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in
order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the
customer about the problem and the conditions at the time the malfunction occurred.
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Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
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The following 5 items are important points in problem analysis:
NEXT -- Continue to next step.
3. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard Voltage:
