DESCRIPTION
There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3.
Symptom |
Trouble Area |
---|---|
No resistance exists between terminal 15 (CA5H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 16 (CA5L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3. |
|
WIRING DIAGRAM
w/ Top-mounted Air Conditioner Pressure Sensor
w/ Side-mounted Air Conditioner Pressure Sensor
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
DTC check procedure: Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch), turn the LDA main switch on and wait for approximately 52 seconds or more.
Click here
Click here
HINT:
PROCEDURE
1. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (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.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 3 CAN Junction Connector) |
*b |
to Combination Meter Assembly |
*c |
to Main Body ECU (Multiplex Network Body ECU) |
*d |
to Headlight ECU Sub-assembly LH (for LED Headlight) |
*e |
to Air Conditioning Amplifier Assembly |
*f |
to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System) |
*g |
to Central Gateway ECU (Network Gateway ECU) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
Connected to |
---|---|---|---|
F114-1 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Combination meter assembly |
F114-12 (CANL) - F41-4 (CG) |
|||
F114-2 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Main body ECU (multiplex network body ECU) |
F114-13 (CANL) - F41-4 (CG) |
|||
F114-3 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Headlight ECU sub-assembly LH*1 |
F114-14 (CANL) - F41-4 (CG) |
|||
F114-4 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Air conditioning amplifier assembly |
F114-15 (CANL) - F41-4 (CG) |
|||
F114-5 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Certification ECU (smart key ECU assembly)*2 |
F114-16 (CANL) - F41-4 (CG) |
|||
F114-6 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
Central gateway ECU (network gateway ECU) |
F114-17 (CANL) - F41-4 (CG) |
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 TO GND IN CAN BUS LINE (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.
*1 |
DLC3 |
- |
- |
*a |
Front view of wire harness connector (to No. 3 CAN Junction Connector) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F114-6 (CANH) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
F114-17 (CANL) - F41-4 (CG) |
OK | ![]() |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | ![]() |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (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 bus line shorted to GND is connected.
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(c) Measure the resistance according to the value(s) in the table below.
*1 |
DLC3 |
- |
- |
*a |
Component with harness connected (Central Gateway ECU (Network Gateway ECU)) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F74-15 (CA5H) - F41-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
F74-16 (CA5L) - F41-4 (CG) |
HINT:
OK | ![]() |
REPLACE ECU OR SENSOR |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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