DESCRIPTION
There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) 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 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (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 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 GND IN CAN BUS LINE (NO. 2 JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) auxiliary 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 Brake Booster with Master Cylinder Assembly | *d | to Inverter with Converter Assembly |
*e | to ECM | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
A71-8 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | No. 4 CAN junction connector |
A71-19 (CANL) - G57-4 (CG) | |||
A71-9 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Brake booster with master cylinder assembly |
A71-20 (CANL) - G57-4 (CG) | |||
A71-10 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Inverter with converter assembly |
A71-21 (CANL) - G57-4 (CG) | |||
A71-11 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | ECM |
A71-22 (CANL) - G57-4 (CG) |
Result | Proceed to |
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OK | A |
NG (Line to No. 4 CAN junction connector) | B |
NG (Line to ECU or sensor) | C |
A | REPLACE NO. 2 JUNCTION CONNECTOR |
C | GO TO STEP 5 |
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2. | CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 4 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 Hybrid Vehicle Control ECU |
*c | to No. 2 Junction Connector | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
G99-9 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Hybrid vehicle control ECU |
G99-20 (CANL) - G57-4 (CG) | |||
G99-11 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | No. 2 junction connector |
G99-22 (CANL) - G57-4 (CG) |
Result | Proceed to |
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OK | A |
NG (Line to No. 2 junction connector) | B |
NG (Line to ECU or sensor) | C |
B | REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
C | GO TO STEP 5 |
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3. | CHECK FOR SHORT TO GND 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) |
*c | to Vehicle Approaching Speaker Controller | - | - |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
G98-1 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Central gateway ECU (network gateway ECU) |
G98-12 (CANL) - G57-4 (CG) | |||
G98-2 (CANH) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher | Vehicle approaching speaker controller |
G98-13 (CANL) - G57-4 (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. 4 CAN JUNCTION CONNECTOR |
C | GO TO STEP 5 |
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4. | CHECK FOR SHORT TO GND 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) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
G98-12 (CANL) - G57-4 (CG) |
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)) |
5. | 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 |
---|---|---|
G66-18 (CA4H) - G57-4 (CG) | Cable disconnected from negative (-) auxiliary battery terminal | 200 Ω or higher |
G66-17 (CA4L) - G57-4 (CG) |
HINT:
OK | REPLACE ECU OR SENSOR |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |