T-TT-0426-16

Tech Tip T-TT-0426-16
November 14, 2016
Subject
Market
2012 - 2014 RAV4 EV - Communication Problems Gateway ECU
USA
Service Category
Section
Engine/Hybrid System
Hybrid/Battery Control System
Applicability
2012 - 2014 RAV4 EV
APPLICABLE VEHICLES
2012-2014
RAV4 EV
CONDITION
Some technicians have experienced communication issues between the Techstream TESLA software
program and Gateway ECU when attempting to read MIL ON information or firmware update.
Utilize the troubleshooting steps provided in the recommendations section to establish communication
between the Techstream TESLA software program and Gateway ECU for the following issues:


No VIN or No green light displayed
Failure of component firmware update
RECOMMENDATIONS
Case 1: No VIN or green light displayed in the Techstream TESLA software program
Please perform these steps BEFORE replacing the Gateway ECU.
1.
2.
3.
4.
5.
6.
7.
Ensure that the vehicle is in the “ON” state and/or cycle the vehicle ignition “ON”
Confirm TESLA software is current
Reboot Techstream
Try different serial data cable
Try different Techstream unit
Unplug the Gateway ECU for 20 minutes & then reconnect
Please create a TAS case and contact Technical Assistance (TAS) to submit details
on any vehicle identified matching the condition described in this document prior to
repair.
If you are attempting to contact TAS on a weekend or TMS holiday, continue with
diagnosis and submit the requested information on the next available work day.
Retain all replaced parts and technician notes for possible review with TMS TAS
Product Engineer.
Expires on
Ver. 2.7 01/01/2016 T
11/14/2017
© 2016, Toyota Motor Sales, USA
Page 1 of 3
Tech Tip T-TT-0426-16
November 14, 2016
Subject
Market
2012 - 2014 RAV4 EV - Communication Problems Gateway ECU
USA
Applicability
RECOMMENDATIONS
Case 2: Failure of component firmware update
Firmware update status
Identifying the percentage (%) completion state when the update fails may help in determining the problem
area. Use the following table for problem diagnostic items to attempt before replacing the gateway ECU.
If the failure occurs between 10% - 20% complete
Problem Area
Techstream Network connection
Diagnostic item
 Ensure that the Techstream is connected to the network
 Confirm network IP/Port settings
If the failure occurs between 20% - 40% complete
Problem Area
Techstream serial data cable
Diagnostic item
Try a different serial cable
If the failure occurs after 40% complete
Problem Area
SD Card
Diagnostic item
Please create a TAS case and contact Technical Assistance
(TAS) to submit details on any vehicle identified matching the
condition described in this document prior to repair.
If you are attempting to contact TAS on a weekend or TMS
holiday, continue with diagnosis and submit the requested
information on the next available work day. Retain all
replaced parts and technician notes for possible review with
TMS TAS Product Engineer.
LINK REFERENCES
This Tech Tip does not contain any link references
Expires on
Ver. 2.7 01/01/2016 T
11/14/2017
© 2016, Toyota Motor Sales, USA
Page 2 of 3
Tech Tip T-TT-0426-16
November 14, 2016
Subject
Market
2012 - 2014 RAV4 EV - Communication Problems Gateway ECU
USA
Applicability
Expires on
Ver. 2.7 01/01/2016 T
11/14/2017
© 2016, Toyota Motor Sales, USA
Page 3 of 3