Part 1
NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU
HINT
Operating the engine 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 the branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system Service Precautions.
NOTICE:
* Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the engine switch, any switches or any doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
* w/ Navigation System:
After the engine switch is turned off, the display and navigation module display records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.
Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:
* 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
(1) G82 No. 1 junction connector
Text in Illustration
(2) G83 No. 1 junction connector
Text in Illustration
* *1: w/ Intuitive Parking Assist System (w/ Side Monitor System)
* *2: w/ Intuitive Parking Assist System (w/o Side Monitor System)
* *3: w/ Pre-collision System
(3) G84 No. 1 junction connector
Text in Illustration
(b) NO. 2 JUNCTION CONNECTOR
Text in Illustration
* *: w/ Navigation System
(c) NO. 3 JUNCTION CONNECTOR
(1) G79 No. 3 junction connector
Text in Illustration
(2) G80 No. 3 junction connector
Text in Illustration
* *1: w/ Pre-collision System
* *2: w/ Driver Monitor Camera
* *3: w/ Lane Departure Alert System
(3) G81 No. 3 junction connector
Text in Illustration
(d) NO. 4 JUNCTION CONNECTOR
Text in Illustration
* *1: w/ Air Suspension System
* *2: w/ Adaptive Front-lighting System
(e) NO. 5 JUNCTION CONNECTOR
Text in Illustration
(f) NO. 6 JUNCTION CONNECTOR
Text in Illustration
3. CHECK DLC3
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
* w/ Navigation System:
After the engine switch is turned off, the display and navigation module display records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.
Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:
* 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
Text in Illustration
(a) Disconnect the C30, G44 and G45 ECM connectors.
(b) Measure the resistance according to the value(s) in the table below.
for V1 Bus
for Power Management Bus
5. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Text in Illustration
(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
6. CHECK COMBINATION METER ASSEMBLY
(a) Disconnect the G3 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
7. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Disconnect the G1 center airbag sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
8. CHECK MASTER CYLINDER SOLENOID (SKID CONTROL ECU)
(a) Disconnect the A7 master cylinder solenoid (skid control ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
9. CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
(a) Disconnect the G21 spiral with sensor cable sub-assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
10. CHECK YAW RATE SENSOR ASSEMBLY
(a) Disconnect the G40 yaw rate sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
11. CHECK CERTIFICATION ECU
(a) Disconnect the G26 certification ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
12. CHECK POWER MANAGEMENT CONTROL ECU
Text in Illustration
(a) Disconnect the G39 power management control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
for V1 Bus
for V2 Bus
for Power Management Bus
13. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY (w/ Navigation System)
(a) Disconnect the H4 display and navigation module display connector.
(b) Measure the resistance according to the value(s) in the table below.
14. CHECK FOUR WHEEL DRIVE CONTROL ECU
(a) Disconnect the G41 and G42 four wheel drive control ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.
15. CHECK SUSPENSION CONTROL ECU (w/ Air Suspension System)
(a) Disconnect the A40 suspension control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
