Toyota Yaris: Lin Communication System / How To Proceed With Troubleshooting

HINT:

• Use the following procedure to troubleshoot the LIN communication system.
• *: Use the GTS.

HINT:

• 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.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for problem analysis:

System Description

SYSTEM DESCRIPTION LIN COMMUNICATION SYSTEM DESCRIPTION The LIN communication system is used for communication between the components in the tables below...

Terminals Of Ecu

TERMINALS OF ECU CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 POWER DISTRIBUTION BOX ASSEMBLY *2 MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove main body ECU (multiplex network body ECU)...

Other information:

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Driver Frontal Stage 1 Deployment Control Circuit Resistance Below Threshold (B00011A)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Test Mode / Check Mode B00011A Driver Frontal Stage 1 Deployment Control Circuit Resistance Below Threshold The airbag sensor assembly detects a line short in the driver seat airbag squib circuit for 2 seconds during the primary check Spiral cable sub-assembly malfunction Horn button assembly malfunction Airbag sensor assembly malfunction Harness or connector Spiral cable sub-assembly Horn button assembly Airbag sensor assembly Comes on Applies to check mode WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal...

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual: Power Source Control System Circuit Short to Ground (B278211)

DESCRIPTION The certification ECU (smart key ECU assembly) has a power source mode switching function. This DTC is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the certification ECU (smart key ECU assembly) to the steering lock ECU (steering lock actuator or upper bracket assembly) is determined to be abnormal...