Part 1

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

1. BUS CHECK

(a) Select "CAN Bus Check" from the "System Select".

2. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION

(a) System (ECUs and sensors) that use CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs and sensors) are installed on the vehicle.

3. DTC TABLE BY ECU

HINT
* In the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using the Techstream.
* If CAN communication system DTCs are output, the trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING".
(a) SKID CONTROL ECU

HINT
DTC communication uses the CAN communication system.

(b) SKID CONTROL ECU GATEWAY

HINT
DTC communication uses the CAN communication system.

(d) ECM GATEWAY

HINT
DTC communication uses the CAN communication system.

(e) HYBRID VEHICLE CONTROL ECU

HINT
DTC communication uses the CAN communication system.

HINT
* *1: Refer to hybrid control system How To Proceed With Troubleshooting.
* *2: Refer to hybrid battery system U029A.
* *3: U1104 is output when an error occurs in communication from the driving support ECU to the hybrid vehicle control ECU.
(f) MAIN BODY ECU

HINT
DTC communication uses the CAN communication system.

(g) COMBINATION METER

HINT
DTC communication uses the CAN communication system.

(h) POWER STEERING ECU

HINT
DTC communication uses the CAN communication system.

(i) STEERING CONTROL ECU

HINT
DTC communication uses the CAN communication system.

(j) SUSPENSION CONTROL ECU

HINT
DTC communication uses the CAN communication system.

(k) SEAT BELT CONTROL ECU

For vehicles with pre-collision system only.

HINT
DTC communication uses the CAN communication system.

(l) DRIVING SUPPORT ECU

For vehicles with dynamic radar cruise control system or pre-collision system only.

HINT
DTC communication uses the CAN communication system.

HINT
* *1: Refer to the diagnostic trouble code chart CAN Communication System.
* *2: Refer to the lane keeping assist system U1119.
(m) ELECTRIC PARKING BRAKE ECU

HINT
DTC communication uses the CAN communication system.

(n) PARKING ASSIST ECU

HINT
DTC communication uses the CAN communication system.

(o) MULTIPLEX TILT AND TELESCOPIC ECU

HINT
DTC communication uses the CAN communication system.

HINT
*: Refer to power tilt and power telescopic steering column system B2624.

(p) AFS ECU

HINT
DTC communication uses the CAN communication system.

(q) DISPLAY AND NAVIGATION MODULE DISPLAY

HINT
DTC communication uses the CAN communication system.

HINT
* *1: The DTC is not output to the intelligent tester. It is only output to the screen of the display and navigation module display.
* *2: Electronically Controlled Brake System
(r) OUTER MIRROR SWITCH

HINT
DTC communication uses the CAN communication system.

(s) REAR POWER SEAT MODULE SWITCH

For vehicles with rear power seat control system or seat heater system.

HINT
DTC communication uses the CAN communication system.

(t) FRONT ACTIVE STABILIZER CONTROL ECU

For vehicles with active stabilizer suspension system only.

HINT
DTC communication uses the CAN communication system.

(u) REAR ACTIVE STABILIZER CONTROL ECU

For vehicles with active stabilizer suspension system only.

HINT
DTC communication uses the CAN communication system.

(v) CENTER AIRBAG SENSOR

HINT
The center airbag sensor is connected to the CAN communication system but CAN communication DTCs are not output.

(w) CERTIFICATION ECU

HINT
The certification ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(x) AIR CONDITIONING AMPLIFIER

HINT
The air conditioning amplifier is connected to the CAN communication system but CAN communication DTCs are not output.

(y) FRONT CONTROLLER

HINT
The front controller is connected to the CAN communication system but CAN communication DTCs are not output.

(z) STEERING PAD ECU

HINT
The steering pad ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(aa) FRONT MULTIPLEX NETWORK DOOR ECU LH

HINT
The front multiplex network door ECU LH is connected to the CAN communication system but CAN communication DTCs are not output.

(ab) FRONT MULTIPLEX NETWORK DOOR ECU RH

HINT
The front multiplex network door ECU RH is connected to the CAN communication system but CAN communication DTCs are not output.

(ac) REAR MULTIPLEX NETWORK DOOR ECU LH

HINT
The rear multiplex network door ECU LH is connected to the CAN communication system but CAN communication DTCs are not output.

(ad) REAR MULTIPLEX NETWORK DOOR ECU RH

HINT
The rear multiplex network door ECU RH is connected to the CAN communication system but CAN communication DTCs are not output.

(ae) FRONT POWER SEAT ECU AND SWITCH LH

HINT
The front power seat ECU and switch LH is connected to the CAN communication system but CAN communication DTCs are not output.

(af) FRONT POWER SEAT ECU AND SWITCH RH

For vehicles with rear power seat control system only.

HINT
The front power seat ECU and switch RH is connected to the CAN communication system but CAN communication DTCs are not output.

(ag) COMBINATION SWITCH

HINT
The combination switch is connected to the CAN communication system but CAN communication DTCs are not output.

(ah) POWER TRUNK LID CONTROL ECU

For vehicles with power trunk lid system only.

HINT
The multiplex network door ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(ai) REAR JUNCTION BLOCK ECU

HINT
The rear junction block ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(aj) TIRE PRESSURE WARNING ECU

HINT
The tire pressure warning ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(ak) FRONT MILLIMETER WAVE RADAR SENSOR

For vehicles with dynamic radar cruise control system or pre-collision system only.

HINT
The front millimeter wave radar sensor is connected to the CAN communication system but CAN communication DTCs are not output.

(al) OBJECT RECOGNITION ECU

For vehicles with driver monitor camera only.

HINT
The object recognition ECU is connected to the CAN communication system but CAN communication DTCs are not output.

(am) DRIVER MONITOR ECU

For vehicles with driver monitor camera only.

HINT
The driver monitor ECU is connected to the CAN communication system but CAN communication DTCs are not output.

4. DTC COMBINATION TABLE

HINT
* o: Output.
* X: When one side of branch wire is open, output may occur.
* *1: Only output when communication recovery has occurred. During communication stop, cannot be output.
* *5: Only present DTCs output.
* *6: Output only immediately after power switch turned ON (IG).
* *7: Output only cruise main switch is ON.
* *8: The DTC is not output to the Techstream. It is only output to the screen of the display and navigation module display.
* *9: Electronically Controlled Brake System.

HINT
* o: Output.
* X: When one side of branch wire is open, output may occur.
* *1: Only output when communication recovery has occurred. During communication stop, cannot be output.
* *5: Only present DTCs output.
* *8: The DTC is not output to the Techstream. It is only output to the screen of the display and navigation module display.
* *9: Electronically Controlled Brake System.