DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 8 (CA1L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
Symptom | Trouble Area |
---|---|
There is no resistance between terminal 23 (CA1H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 8 (CA1L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3. |
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WIRING DIAGRAM
w/ Parking Assist Monitor System or Panoramic View Monitor SystemCAUTION / 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 ignition switch to ON 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 VEHICLE TYPE |
(a) Check vehicle type.
Result | Proceed to |
---|---|
w/ Parking Assist Monitor System or Panoramic View Monitor System |
A |
w/ Rear View Monitor System |
B |
B |
![]() | GO TO STEP 6 |
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2. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A66 No. 1 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. 1 CAN Junction Connector) |
*b | to Millimeter Wave Radar Sensor Assembly (w/ Front Camera System) |
*c | to Forward Recognition Camera (w/ Front Camera System) |
*d | to Central Gateway ECU (Network Gateway ECU) |
*e | to No. 5 CAN Junction Connector |
- | - |
Standard Resistance:
Tester Connection | Condition |
Specified Condition | Connected to |
---|---|---|---|
A66-1 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Millimeter wave radar sensor assembly* |
A66-7 (CANL) - K138-16 (BAT) | |||
A66-2 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Forward recognition camera* |
A66-8 (CANL) - K138-16 (BAT) | |||
A66-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
A66-9 (CANL) - K138-16 (BAT) | |||
A66-5 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 5 CAN junction connector |
A66-11 (CANL) - K138-16 (BAT) |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) |
B |
NG (Line to No. 5 CAN junction connector) |
C |
NG (Line to ECU or sensor) |
D |
A |
![]() | REPLACE NO. 1 CAN JUNCTION CONNECTOR |
C |
![]() | GO TO STEP 4 |
D |
![]() | GO TO STEP 8 |
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3. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the K76 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. 1 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition |
Specified Condition |
---|---|---|
A66-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
A66-9 (CANL) - K138-16 (BAT) |
OK | ![]() | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
|
NG | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
4. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 5 CAN JUNCTION CONNECTOR) |
(a) Disconnect the R98 No. 5 CAN junction 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. 5 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
*c | to Clearance Warning ECU Assembly (w/ Intuitive Parking Assist System) |
*d | to Blind Spot Monitor Sensor RH (w/ Blind Spot Monitor System) |
*e | to Rear Television Camera Assembly |
*f | to No. 1 CAN Junction Connector |
*g | to Television Camera Controller (w/ Panoramic View Monitor System) |
- | - |
Standard Resistance:
Tester Connection | Condition |
Specified Condition | Connected to |
---|---|---|---|
R98-1 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
R98-11 (CANL) - K138-16 (BAT) | |||
R98-2 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Clearance warning ECU assembly*1 |
R98-12 (CANL) - K138-16 (BAT) | |||
R98-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Blind spot monitor sensor RH*2 |
R98-13 (CANL) - K138-16 (BAT) | |||
R98-4 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Rear television camera assembly |
R98-14 (CANL) - K138-16 (BAT) | |||
R98-5 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
No. 1 CAN junction connector |
R98-15 (CANL) - K138-16 (BAT) | |||
R98-8 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Television camera controller*3 |
R98-18 (CANL) - K138-16 (BAT) |
Result | Proceed to |
---|---|
OK | A |
NG (Line to central gateway ECU (network gateway ECU)) |
B |
NG (Line to No. 1 CAN junction connector) |
C |
NG (Line to ECU or sensor) |
D |
A |
![]() | REPLACE NO. 5 CAN JUNCTION CONNECTOR |
C |
![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) |
D |
![]() | GO TO STEP 8 |
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5. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the K76 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. 5 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition |
Specified Condition |
---|---|---|
R98-1 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
R98-11 (CANL) - K138-16 (BAT) |
OK | ![]() | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
|
NG | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
6. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A66 No. 1 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. 1 CAN Junction Connector) |
*b | to Millimeter Wave Radar Sensor Assembly (w/ Front Camera System) |
*c | to Forward Recognition Camera (w/ Front Camera System) |
*d | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition |
Specified Condition | Connected to |
---|---|---|---|
A66-1 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Millimeter wave radar sensor assembly* |
A66-7 (CANL) - K138-16 (BAT) | |||
A66-2 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Forward recognition camera* |
A66-8 (CANL) - K138-16 (BAT) | |||
A66-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
A66-9 (CANL) - K138-16 (BAT) | |||
A66-5 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
Central gateway ECU (network gateway ECU) |
A66-11 (CANL) - K138-16 (BAT) |
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. 1 CAN JUNCTION CONNECTOR |
C |
![]() | GO TO STEP 8 |
|
7. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the K76 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. 1 CAN Junction Connector) |
*b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition |
Specified Condition |
---|---|---|
A66-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
A66-9 (CANL) - K138-16 (BAT) | ||
A66-5 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
A66-11 (CANL) - K138-16 (BAT) |
OK | ![]() | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)
|
NG | ![]() | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
8. |
CHECK FOR SHORT TO +B 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 +B 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 |
---|---|---|
K76-23 (CA1H) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
K76-8 (CA1L) - K138-16 (BAT) |
HINT:
OK | ![]() | REPLACE ECU OR SENSOR |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |