DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) 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 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) 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 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 +B IN CAN BUS LINE (NO. 2 JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A71 No. 2 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. 2 Junction Connector) | *b | to No. 4 CAN Junction Connector |
*c | to ECM | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A71-8 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher | No. 4 CAN junction connector |
A71-19 (CANL) - G57-16 (BAT) | |||
A71-11 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher | ECM |
A71-22 (CANL) - G57-16 (BAT) |
Result | Proceed to |
---|---|
OK | A |
NG (Line to ECU) | B |
NG (Line to No. 4 CAN junction connector) | C |
A | REPLACE NO. 2 JUNCTION CONNECTOR |
C | GO TO STEP 3 |
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2. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 2 JUNCTION CONNECTOR - ECM) |
(a) Disconnect the A25 ECM 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 Junction Connector) | *b | to ECM |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A71-11 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher |
A71-22 (CANL) - G57-16 (BAT) |
OK | REPLACE ECM |
NG | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - ECM) |
3. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 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. 2 Junction Connector |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G99-11 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher |
G99-22 (CANL) - G57-16 (BAT) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 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 Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G98-1 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher |
G98-12 (CANL) - G57-16 (BAT) |
OK | REPLACE NO. 4 CAN JUNCTION CONNECTOR |
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5. | CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 4 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. 4 CAN Junction Connector) | *b | to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
G98-1 (CANH) - G57-16 (BAT) | Cable disconnected from negative (-) battery terminal | 6 kΩ or higher |
G98-12 (CANL) - G57-16 (BAT) |
OK | REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
NG | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |