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 resistance 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 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
Text in Illustration
(b) NO. 2 JUNCTION CONNECTOR
Text in Illustration
* *: w/ Smart Key System
3. CHECK DLC3
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance 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:
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 A35 and B30 ECM connectors.
(b) Measure the resistance according to the value(s) in the table below.
for V1 Bus
for Power Management Bus
for Powertrain Bus
5. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU) Removal.
(b) Reconnect the 2B and 2D instrument panel junction block assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
6. CHECK BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)
(a) Disconnect the A36 brake actuator assembly (skid control ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
7. CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR)
(a) Disconnect the C53 spiral with sensor cable sub-assembly (steering angle sensor) connector.
(b) Measure the resistance according to the value(s) in the table below.
8. CHECK YAW RATE SENSOR ASSEMBLY
(a) Disconnect the C52 yaw rate sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
9. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Disconnect the C20 center airbag sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)
(a) Disconnect the C35 certification ECU (smart key ECU assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
11. CHECK POWER SOURCE CONTROL ECU (w/ Smart Key System)
Text in Illustration
(a) Disconnect the C43 power source control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
for V1 Bus
for Power Management Bus
12. CHECK COMBINATION METER ASSEMBLY
(a) Disconnect the C50 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
13. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY
(a) Disconnect the C32 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
14. CHECK POWER STEERING ECU ASSEMBLY
(a) Disconnect the A26 and C48 power steering ECU assembly connectors.
(b) Measure the resistance according to the value(s) in the table below.
15. CHECK TRANSMISSION CONTROL ECU ASSEMBLY (for Automatic Transaxle)
(a) Disconnect the B31 transmission control ECU assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
