DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 22 (CA2H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 7 (CA2L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3.
Symptom | Trouble Area |
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There is no resistance between terminal 22 (CA2H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 7 (CA2L) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) 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 power 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 +B IN CAN BUS LINE (NO. 7 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the N99 No. 7 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. 7 CAN Junction Connector) | *b | to Tire Pressure Warning ECU and Receiver |
*c | to Occupant Detection ECU | *d | to Central Gateway ECU (Network Gateway ECU) |
*e | to No. 4 CAN Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
N99-1 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Tire pressure warning ECU and receiver |
N99-7 (CANL) - G57-16 (BAT) | |||
N99-2 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Occupant detection ECU |
N99-8 (CANL) - G57-16 (BAT) | |||
N99-3 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Central gateway ECU (network gateway ECU) |
N99-9 (CANL) - G57-16 (BAT) | |||
N99-4 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | No. 4 CAN junction connector |
N99-10 (CANL) - G57-16 (BAT) |
Result | Proceed to |
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OK | A |
NG (Line to central gateway ECU (network gateway ECU)) | B |
NG (Line to No. 4 CAN junction connector) | C |
NG (Line to ECU or sensor) | D |
A | REPLACE NO. 7 CAN JUNCTION CONNECTOR |
C | GO TO STEP 3 |
D | GO TO STEP 6 |
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2. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 7 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the G66 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. 7 CAN Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
N99-3 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
N99-9 (CANL) - G57-16 (BAT) |
OK | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
3. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR) |
(a) Disconnect the G99 No. 4 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. 4 CAN Junction Connector) | *b | to No. 7 CAN Junction Connector |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G99-6 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
G99-17 (CANL) - G57-16 (BAT) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR) |
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4. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR) |
(a) Disconnect the G98 No. 4 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. 4 CAN Junction Connector) | *b | to No. 2 CAN Junction Connector |
*c | to Steering Sensor | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
G98-6 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | No. 2 CAN junction connector |
G98-17 (CANL) - G57-16 (BAT) | |||
G98-7 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Steering sensor |
G98-18 (CANL) - G57-16 (BAT) |
Result | Proceed to |
---|---|
OK | A |
NG (Line to No. 2 CAN junction connector) | B |
NG (Line to ECU or sensor) | C |
A | REPLACE NO. 4 CAN JUNCTION CONNECTOR |
C | GO TO STEP 6 |
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5. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 CAN JUNCTION CONNECTOR) |
(a) Disconnect the A69 No. 2 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. 2 CAN Junction Connector) | *b | to Brake Booster with Master Cylinder Assembly |
*c | to Airbag ECU Assembly | *d | to ECM |
*e | to Rack and Pinion Power Steering Gear Assembly | *f | to No. 4 CAN Junction Connector |
*g | to Brake Actuator Assembly | *h | to Hybrid Vehicle Control ECU |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A69-1 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Brake booster with master cylinder assembly |
A69-11 (CANL) - G57-16 (BAT) | |||
A69-2 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Airbag ECU assembly |
A69-12 (CANL) - G57-16 (BAT) | |||
A69-3 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | ECM |
A69-13 (CANL) - G57-16 (BAT) | |||
A69-4 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Rack and pinion power steering gear assembly |
A69-14 (CANL) - G57-16 (BAT) | |||
A69-5 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | No. 4 CAN junction connector |
A69-15 (CANL) - G57-16 (BAT) | |||
A69-6 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Brake actuator assembly |
A69-16 (CANL) - G57-16 (BAT) | |||
A69-7 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher | Hybrid vehicle control ECU |
A69-17 (CANL) - G57-16 (BAT) |
Result | Proceed to |
---|---|
OK | A |
NG (Line to No. 4 CAN junction connector) | B |
NG (Line to ECU or sensor) | C |
A | REPLACE NO. 2 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 4 CAN JUNCTION CONNECTOR) |
C | GO TO STEP 6 |
6. | 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 |
---|---|---|
G66-22 (CA2H) - G57-16 (BAT) | Cable disconnected from negative (-) auxiliary battery terminal | 6 kΩ or higher |
G66-7 (CA2L) - G57-16 (BAT) |
HINT:
OK | REPLACE ECU OR SENSOR |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |