DESCRIPTION
There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 23 (CA1H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 8 (CA1L) of the network gateway ECU and terminal 4 (CG) of the DLC3.
Symptom | Trouble Area |
---|---|
There is no resistance between terminal 23 (CA1H) of the network gateway ECU and terminal 4 (CG) of the DLC3, or terminal 8 (CA1L) of the network gateway ECU and terminal 4 (CG) of the DLC3. |
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
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HINT:
PROCEDURE
1. | CHECK FOR SHORT TO GND IN CAN BUS LINE (NETWORK GATEWAY ECU) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the J75 network gateway ECU connector.
*1 | DLC3 | - | - |
*a | Front view of wire harness connector (to Network Gateway ECU) | - | - |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J75-23 (CA1H) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher |
J75-8 (CA1L) - J141-4 (CG) |
OK | ![]() | REPLACE NETWORK GATEWAY ECU |
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2. | CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR) |
(a) Reconnect the J75 network gateway ECU connector.
(b) Disconnect the S56, S57, S58 and S59 No. 10 CAN junction connectors.
HINT:
*1 | DLC3 | - | - |
*a | Rear view of wire harness connector (to No. 10 CAN Junction Connector) | *b | to Network Gateway ECU |
*c | to No. 3 CAN Junction Connector | *d | to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System) |
*e | to Rear Television Camera Assembly | - | - |
Code | Color (CANH Side) | Color (CANL Side) | Connected to |
---|---|---|---|
S56 | G | W | Network gateway ECU |
S57 | LG | W | No. 3 CAN junction connector |
S58 | V | W | Blind spot monitor sensor LH |
S59 | P | W | Rear television camera assembly |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
S56-1 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Network gateway ECU |
S56-2 (CANL) - J141-4 (CG) | |||
S57-1 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | No. 3 CAN junction connector |
S57-2 (CANL) - J141-4 (CG) | |||
S58-1 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Blind spot monitor sensor LH* |
S58-2 (CANL) - J141-4 (CG) | |||
S59-1 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Rear television camera assembly |
S59-2 (CANL) - J141-4 (CG) |
Result | Proceed to |
---|---|
OK | A |
NG (Network gateway ECU main line) | B |
NG (ECU or sensor bus line) | C |
NG (No. 3 CAN junction connector main line) | D |
A | ![]() | REPLACE NO. 10 CAN JUNCTION CONNECTOR |
B | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 10 CAN JUNCTION CONNECTOR) |
C | ![]() | GO TO STEP 4 |
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3. | CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Reconnect the S56, S57, S58 and S59 No. 10 CAN junction connectors.
(b) Disconnect the J95 No. 3 CAN junction connector.
*1 | DLC3 | - | - |
*a | Front view of wire harness connector (to No. 3 CAN Junction Connector) | *b | to Network Gateway ECU |
*c | to Parking Assist ECU (w/ Panoramic View Monitor System) | *d | to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
*e | to Millimeter Wave Radar Sensor Assembly | *f | to Forward Recognition Camera |
*g | to No. 10 CAN Junction Connector | - | - |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
J95-1 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Network gateway ECU |
J95-11 (CANL) - J141-4 (CG) | |||
J95-2 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Parking assist ECU*1 |
J95-12 (CANL) - J141-4 (CG) | |||
J95-3 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Clearance warning ECU assembly*2 |
J95-13 (CANL) - J141-4 (CG) | |||
J95-5 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Millimeter wave radar sensor assembly |
J95-15 (CANL) - J141-4 (CG) | |||
J95-8 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | Forward recognition camera |
J95-18 (CANL) - J141-4 (CG) | |||
J95-10 (CANH) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher | No. 10 CAN junction connector |
J95-20 (CANL) - J141-4 (CG) |
Result | Proceed to |
---|---|
OK | A |
NG (No. 10 CAN junction connector main line) | B |
NG (ECU or sensor bus line) | C |
NG (Network gateway ECU main line) | D |
A | ![]() | REPLACE NO. 3 CAN JUNCTION CONNECTOR |
B | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR) |
D | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NETWORK GATEWAY ECU) |
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4. | CHECK FOR SHORT TO GND IN CAN BUS LINE (ECU, 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 (Network Gateway ECU) | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J75-23 (CA1H) - J141-4 (CG) | Cable disconnected from negative (-) battery terminal | 200 Ω or higher |
J75-8 (CA1L) - J141-4 (CG) |
HINT:
If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
OK | ![]() | REPLACE CORRESPONDING ECU OR SENSOR |
NG | ![]() | REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR CAN BUS LINE OR CONNECTOR |
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