CAN Communication System

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:
* Before measuring the resistance, leave the vehicle for at least a minute and do not operate the ignition switch, any switches or any doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
* When disconnecting the cable some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

2. JUNCTION CONNECTOR

(a) NO. 1 JUNCTION CONNECTOR





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(b) NO. 2 JUNCTION CONNECTOR





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*1: w/o Navigation System

*2: w/ Navigation System

*3: w/ Kinetic Dynamic Suspension System

(c) NO. 3 JUNCTION CONNECTOR

(1) V1 bus:





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*1: w/o Navigation System

*2: w/ Navigation System

*3: for 4WD

*4: w/ Smart Key System

*5: w/o Smart Key System

(2) Power management bus (w/ Smart Key System):





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*: for 1GR-FE

(d) NO. 4 JUNCTION CONNECTOR (w/ Navigation System)





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3. CHECK DLC3

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

(b) Measure the resistance according to the value(s) in the table below.









4. CHECK ECM





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(a) Disconnect the B38, B39, F50 and F51 ECM connectors.

(b) Measure the resistance according to the value(s) in the table below.

for V1 Bus (for 1GR-FE)





for V1 Bus (for 2TR-FE)





for Power Management Bus (w/ Smart Key System)





5. CHECK DRIVER SIDE JUNCTION BLOCK, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)





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(a) Remove the main body ECU (multiplex network body ECU) Removal.

(b) Measure the resistance according to the value(s) in the table below.

for V1 Bus





for MS Bus (w/ CRAWL Control)





6. CHECK MASTER CYLINDER SOLENOID (SKID CONTROL ECU)





(a) Disconnect the A6 master cylinder solenoid (skid control ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.





7. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY





(a) Disconnect the F42 air conditioning amplifier assembly connector.

(b) Measure the resistance according to the value(s) in the table below.





8. CHECK STABILIZER CONTROL ECU (w/ Kinetic Dynamic Suspension System)





(a) Disconnect the F70 stabilizer control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.





9. CHECK COMBINATION METER ASSEMBLY





(a) Disconnect the F14 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.





10. CHECK CENTER AIRBAG SENSOR ASSEMBLY





(a) Disconnect the F33 center airbag sensor assembly connector.

(b) Measure the resistance according to the value(s) in the table below.





11. CHECK SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR)





(a) Disconnect the F19 spiral cable sub-assembly (steering angle sensor) connector.

(b) Measure the resistance according to the value(s) in the table below.





12. CHECK NAVIGATION RECEIVER ASSEMBLY (w/ Navigation System)





(a) Disconnect the G20 and G28 navigation receiver assembly connectors.

(b) Measure the resistance according to the value(s) in the table below.





13. CHECK YAW RATE SENSOR ASSEMBLY





(a) Disconnect the F36 yaw rate sensor assembly connector.

(b) Measure the resistance according to the value(s) in the table below.





14. CHECK POWER STEERING ECU ASSEMBLY





(a) Disconnect the F41 power steering ECU assembly connector.

(b) Measure the resistance according to the value(s) in the table below.





15. CHECK FOUR WHEEL DRIVE CONTROL ECU (for 4WD)





(a) Disconnect the F47 and F46 four wheel drive control ECU connectors.

(b) Measure the resistance according to the value(s) in the table below.





16. CHECK POWER MANAGEMENT CONTROL ECU (w/ Smart Key System)





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(a) Disconnect the F80 power management control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

for V1 Bus





for Power Management Bus





17. CHECK CERTIFICATION ECU (w/ Smart Key System)





(a) Disconnect the F79 certification ECU connector.

(b) Measure the resistance according to the value(s) in the table below.





18. CHECK DRIVE MONITOR SWITCH (w/ CRAWL Control)





(a) Disconnect the U1 drive monitor switch connector.

(b) Measure the resistance according to the value(s) in the table below.