DESCRIPTION
Detection Item |
Symptom |
Trouble Area |
---|---|---|
Main Body ECU Communication Stop Mode |
Either condition is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
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:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (MAIN BODY ECU BRANCH WIRE) |
(a) Disconnect the F9 main body ECU (multiplex network body ECU) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F9-14 (CANH) - F9-13 (CANL) |
Ignition switch off |
54 to 69 Ω |
*a |
Rear view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU]) |
NG | ![]() |
REPAIR OR REPLACE MAIN BODY ECU BRANCH WIRE OR CONNECTOR (CANH, CANL) |
|
3. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND) |
(a) Connect the cable to the negative (-) battery terminal.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
*a |
Rear view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU]) |
*b |
Front view of wire harness connector (to Main Body ECU [Multiplex Network Body ECU]) |
(b) Remove the main body ECU (multiplex network body ECU) (See page
).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F10-3 (GND2) - Body ground |
Always |
Below 1 Ω |
A-11 (GND1) - Body ground |
Always |
Below 1 Ω |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A-32 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
A-31 (ALTB) - Body ground |
Always |
11 to 14 V |
A-30 (BECU) - Body ground |
Always |
11 to 14 V |
A-29 (ACC) - Body ground |
Ignition switch ACC |
11 to 14 V |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
A bolt without a torque specification is shown in the standard bolt
chart (See page ).
PROC ...
Dcm Activation
DCM ACTIVATION
1. DCM ACTIVATION
This function should be used to activate the DCM (Telematics Transceiver) after
a new DCM (Telematics Transceiver) has been installed. During the DCM (Telematics
Transceiver) activation process, the Techstream automatical ...