CAN Communication System (w/ Smart Key System)

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM (w/ Smart Key System): TERMINALS OF ECU

HINT
Operating the power 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 CAN main wire and CAN 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 1 minute and do not operate the power 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

Text in Illustration

* *: w/ Navigation System

(b) NO. 2 JUNCTION CONNECTOR

Text in Illustration

(d) CAN JUNCTION CONNECTOR

Text in Illustration

* *: w/ Power Back Door System

3. TERMINALS OF CONNECTORS FOR JUNCTION CONNECTOR (CAN JUNCTION CONNECTOR)

4. CHECK DLC3

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

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.

5. CHECK HYBRID VEHICLE CONTROL ECU

Text in Illustration

(a) Disconnect the D72 and D73 hybrid vehicle control ECU connectors.

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

for V1 Bus

for Power Management Bus

6. CHECK ECM

Text in Illustration

(a) Disconnect the A67 and B57 ECM connectors.

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

for V1 Bus

for Power Management Bus

7. CHECK SKID CONTROL ECU ASSEMBLY

Text in Illustration

(a) Disconnect the A44 and A46 skid control ECU assembly connectors.

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

for V1 Bus

for Power Management Bus

8. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

Text in Illustration

(a) Disconnect the 1F, D8 and D9 main body ECU (instrument panel junction block assembly) connectors.

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

for V1 Bus

for MS Bus

9. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Text in Illustration

(a) Disconnect the D40 certification ECU (smart key ECU assembly) connector.

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

10. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the D37 air conditioning amplifier assembly connector.

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

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

(a) Disconnect the E2 and E25 navigation receiver assembly connectors.

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

12. CHECK STEERING ANGLE SENSOR

(a) Disconnect the D14 steering angle sensor connector.

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

13. CHECK YAW RATE SENSOR ASSEMBLY

(a) Disconnect the O6 yaw rate sensor assembly connector.

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

14. CHECK CENTER AIRBAG SENSOR ASSEMBLY

(a) Disconnect the D30 center airbag sensor assembly connector.

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

15. CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the E1 combination meter assembly connector.

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

16. CHECK POWER STEERING ECU ASSEMBLY

(a) Disconnect the D5 and D6 power steering ECU assembly connectors.

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

17. CHECK TIRE PRESSURE MONITOR ECU

(a) Disconnect the D33 tire pressure monitor ECU connector.

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

18. CHECK BACK DOOR MOTOR UNIT (POWER BACK DOOR ECU) (w/ Power Back Door System)

(a) Disconnect the O15 back door motor unit (power back door ECU) connector.

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

19. CHECK BUS BUFFER ECU (ACCESSORY GATEWAY)

(a) Disconnect the D50 bus buffer ECU (accessory gateway) connector.

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