Sequoia 4WD V8-4.6L (1UR-FE) (2010)
How to Proceed With Troubleshooting
NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HINT
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DTCs for the CAN communication system are as follows: U0073, U0100, U0101, U1101, U0114, U0122, U0123, U0124, U0126,
U0129, U0199, U0208, U1002, U1115, U0230, B1499, and B2621
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Refer to the troubleshooting procedures of each system if DTCs regarding the CAN communication system are not output.
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Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or
doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
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Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which
causes resistance variation.
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*: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. CHECK AND CLEAR DTC*
(a) Using the Techstream, perform the Health Check (all DTCs check).
NOTICE:
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If a CAN communication trouble code that informs that an ECU or sensor has a power malfunction or interior malfunction is
causing a communication stop, the problem may not be in the communication line. There is a high possibility that the ECU or
sensor has a signal transmission failure. Therefore, first troubleshoot any DTCs related to the ECU or sensor.
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When CAN communication related connectors are disconnected with the ignition switch ON or ACC, the ECU related to the
connector and ECUs of related systems will store a CAN communication DTC.
NEXT -- Continue to next step.
4. CHECK INSTALLED SYSTEMS (ECU AND SENSOR) THAT USE CAN COMMUNICATION
(a) Based on the vehicle equipment and specifications, confirm the systems that use CAN communication See: CAN Communication
System/Diagnosis System.
NEXT -- Continue to next step.
5. CHECK DLC3 BRANCH WIRE AND V BUS CIRCUIT MAIN WIRE (CANH - CANL)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance: