DESCRIPTION
Symptom |
Trouble Area |
---|---|
There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
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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 FOR OPEN IN CAN MAIN BUS LINES |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG |
GO TO STEP 11 |
|
2. |
CHECK FOR SHORT IN CAN BUS LINES |
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG |
GO TO STEP 9 |
|
3. |
CHECK FOR SHORT TO +B IN CAN BUS LINE |
(a) 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 |
---|---|---|
I231-5 (CA8H) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
I231-6 (CA8L) - I26-16 (BAT) |
NG |
GO TO STEP 7 |
|
4. |
CHECK FOR SHORT TO GND IN CAN BUS LINE |
(a) 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 |
---|---|---|
I231-5 (CA8H) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
I231-6 (CA8L) - I26-4 (CG) |
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
5. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the 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 Central Gateway ECU (Network Gateway ECU)) |
*b |
to Option Connector (Bus Buffer ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
I231-5 (CA8H) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
I231-6 (CA8L) - I26-4 (CG) |
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
6. |
CHECK FOR SHORT TO GND IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU)) |
(a) Disconnect the option connector (bus buffer 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 Option Connector (Bus Buffer ECU)) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
I259-2 (CAN+) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
I259-1 (CAN-) - I26-4 (CG) |
OK |
REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
7. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the 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 Central Gateway ECU (Network Gateway ECU)) |
*b |
to Option Connector (Bus Buffer ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
I231-5 (CA8H) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
I231-6 (CA8L) - I26-16 (BAT) |
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
8. |
CHECK FOR SHORT TO +B IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU)) |
(a) Disconnect the option connector (bus buffer 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 Option Connector (Bus Buffer ECU)) |
*b |
to Central Gateway ECU (Network Gateway ECU) |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
I259-2 (CAN+) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
I259-1 (CAN-) - I26-16 (BAT) |
OK |
REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
9. |
CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
10. |
CHECK FOR SHORT IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU)) |
(a) Reconnect the I231 central gateway ECU (network gateway ECU) connector.
(b) Disconnect the option connector (bus buffer ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK |
REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
11. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |
(a) Disconnect the central gateway ECU (network gateway ECU) connector.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK |
REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) |
|
12. |
CHECK FOR OPEN IN CAN MAIN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU)) |
(a) Reconnect the I231 central gateway ECU (network gateway ECU) connector.
(b) Disconnect the option connector (bus buffer ECU) connector.
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
OK |
REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES |
NG |
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)) |