DESCRIPTION
There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is below 54 Ω.
Symptom |
Trouble Area |
---|---|
Resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is below 54 Ω. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
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DTC check procedure: Turn the ignition switch ON and wait at least approximately 60 seconds.
Click here
HINT:
PROCEDURE
1. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the No. 3 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a |
Front view of wire harness connector (to No. 3 CAN junction connector) |
*b |
to DCM (Telematics Transceiver) (w/ Telematics Transceiver) |
*c |
to Radio and Display Receiver Assembly (for Radio and Display Type) |
*d |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
F114-8 (CANH) - F114-19 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
DCM (Telematics transceiver)*1 |
F114-9 (CANH) - F114-20 (CANL) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Radio and display receiver assembly*2 |
F114-10 (CANH) - F114-21 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
F114-11 (CANH) - F114-22 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
Central gateway ECU (network gateway ECU) |
Result |
Proceed to |
---|---|
OK |
A |
NG (Line to central gateway ECU (network gateway ECU)) |
B |
NG (Line to ECU or sensor) |
C |
A | ![]() |
REPLACE NO. 3 CAN JUNCTION CONNECTOR |
C | ![]() |
GO TO STEP 3 |
|
2. |
CHECK FOR SHORT IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the F74 central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. |
CHECK FOR SHORT IN CAN BUS LINES (ECU OR SENSOR) |
(a) Reconnect all wire harness connectors.
(b) Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the short circuited branch line is connected.
Click here
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
HINT:
|
|
OK | ![]() |
REPLACE ECU OR SENSOR |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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DATA LIST / ACTIVE TEST
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether a part
is faulty or not.
HINT:
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REMOVAL
CAUTION / NOTICE / HINT
HINT:
The following procedure is for the LH side.
Use the same procedure for the RH side and LH side.
PROCEDURE
1. PRECAUTION
Click here
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