DESCRIPTION
The network gateway ECU will store this DTC when no signals can be received from the ECUs that have been memorized as those that are connected to sub bus 2*1 or sub bus 18*2.
When the network gateway ECU receives a response signal from the ECUs connected to sub bus 2*1 or sub bus 18*2, the network gateway ECU recognizes and memorizes that the ECU is connected to sub bus 2*1 or sub bus 18*2. Based on this memorized data, the network gateway ECU monitors for malfunctions in the ECUs connected to sub bus 2*1 or sub bus 18*2 when communicating with those ECUs. If the network gateway ECU cannot receive response signals from the ECUs that have been memorized as those connected to sub bus 2*1 or sub bus 18*2, the network gateway ECU determines that a malfunction exists.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
U1002 | Network gateway ECU cannot receive signals from all ECUs that have been memorized as those connected to sub bus 2*1 or sub bus 18*2. |
|
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
*3: w/ Adaptive Variable Suspension System
*4: w/ LEXUS Parking Assist-sensor System
*5: w/ Dynamic Radar Cruise Control System
*6: w/ Pre-crash Safety System
*7: w/ Blind Spot Monitor System
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key, switches or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output Click here.
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notice before proceeding with work Click here.
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the power switch on (IG) and wait at least 20 seconds.
After the repair, perform CAN Bus Check and check that all the ECUs and sensors connected to the CAN communication system are displayed Click here.
Tech Tips
Operating the power switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
CHECK SUB BUS 2*1 OR SUB BUS 18*2
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
*a | Component with harness connected (Network Gateway ECU) |
Disconnect the cable from the negative (-) auxiliary battery terminal.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
OK | A |
NG (Open circuit in CAN main bus line) | B |
NG (Short circuit between bus lines) | C |
NG
|
D |
B |
CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU) Click here |
C |
CHECK FOR SHORT IN CAN BUS LINES (NETWORK GATEWAY ECU) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINE (NO. 1 JUNCTION CONNECTOR) Click here |
A |
CHECK FOR DTC OUTPUT
Clear the DTCs.
Turn the power switch off.
Turn the power switch on (IG) check for DTCs.
Result | Proceed to |
---|---|
U1002 is output from network gateway ECU (GTS display / Gateway CAN*1 or Multi Bus Monitor 1*2) | A |
Other DTC is output | B |
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
B |
GO TO DIAGNOSIS PROCEDURE INDICATED BY OUTPUT DTC Click here |
A |
REPLACE NETWORK GATEWAY ECU Click here
CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU)
*a | Rear view of wire harness connector (to Network Gateway ECU) |
Disconnect the network gateway ECU connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK FOR OPEN IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR) Click here |
OK |
REPLACE NETWORK GATEWAY ECU Click here
CHECK FOR OPEN IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 1 Junction Connector) |
*b | to Network Gateway ECU |
*c | to No. 2 Junction Connector |
Reconnect the network gateway ECU connector.
Disconnect the wire harness connector from the No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
OK | A |
NG (to Network gateway ECU main bus line) | B |
NG (to No. 2 junction connector main bus line) | C |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU) |
C |
CHECK FOR OPEN IN CAN BUS LINES (NO. 2 JUNCTION CONNECTOR) Click here |
A |
REPLACE NO. 1 JUNCTION CONNECTOR
CHECK FOR OPEN IN CAN BUS LINES (NO. 2 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 2 Junction Connector) |
*b | to No. 3 Junction Connector |
*c | to No. 1 Junction Connector |
Reconnect the wire harness connector from the No. 1 junction connector.
Disconnect the wire harness connector from the No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
OK | A |
NG (to No. 1 junction connector main bus line) | B |
NG (to No. 3 junction connector main bus line) | C |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
C |
CHECK FOR OPEN IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR) Click here |
A |
REPLACE NO. 2 JUNCTION CONNECTOR
CHECK FOR OPEN IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 3 Junction Connector) |
*b | to No. 2 Junction Connector |
*c | to No. 4 Junction Connector |
Reconnect the wire harness connector from the No. 2 junction connector.
Disconnect the wire harness connector from the No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
OK | A |
NG (to No. 2 junction connector main bus line) | B |
NG (to No. 4 junction connector main bus line) | C |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
C |
CHECK FOR OPEN IN CAN BUS LINES (NO. 4 JUNCTION CONNECTOR) Click here |
A |
REPLACE NO. 3 JUNCTION CONNECTOR
CHECK FOR OPEN IN CAN BUS LINES (NO. 4 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 4 Junction Connector) |
*b | to No. 3 Junction Connector |
*c | to No. 9 Junction Connector |
Reconnect the wire harness connector from the No. 3 junction connector.
Disconnect the wire harness connector from the No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | Proceed to |
---|---|
OK | A |
NG (to No. 3 junction connector main bus line) | B |
NG (to No. 9 junction connector main bus line) | C |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
C |
CHECK FOR OPEN IN CAN BUS LINES (NO. 9 JUNCTION CONNECTOR) Click here |
A |
REPLACE NO. 4 JUNCTION CONNECTOR
CHECK FOR OPEN IN CAN BUS LINES (NO. 9 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 9 Junction Connector) |
Reconnect the wire harness connector from the No. 4 junction connector.
Disconnect the wire harness connector from the No. 9 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 9 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) |
OK |
REPLACE NO. 9 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (NETWORK GATEWAY ECU)
*a | Rear view of wire harness connector (to Network Gateway ECU) |
Disconnect the network gateway ECU connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CHECK FOR SHORT IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR) Click here |
OK |
REPLACE NETWORK GATEWAY ECU Click here
CHECK FOR SHORT IN CAN BUS LINES (NO. 1 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 1 Junction Connector) |
*b | to Network Gateway ECU |
*c | to Headlight Swivel ECU Assembly (AFS ECU) |
*d | to Power Management Control ECU |
*e | to Clearance Warning ECU Assembly |
*f | to No. 2 Junction Connector |
Reconnect the network gateway ECU connector.
Disconnect the wire harness connector from the No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*: w/ LEXUS Parking Assist-sensor System
Result | Proceed to |
---|---|
OK | A |
NG (to Network gateway ECU main bus line) | B |
NG (to No. 2 junction connector main bus line) | C |
NG (to Headlight swivel ECU assembly [AFS ECU] branch bus line) | D |
NG (to Power management control ECU branch bus line) | |
NG (to Clearance warning ECU assembly branch bus line) |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NETWORK GATEWAY ECU) |
C |
CHECK FOR SHORT IN CAN BUS LINES (NO. 2 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here |
A |
REPLACE NO. 1 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (NO. 2 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 2 Junction Connector) |
*b | to Driving Support ECU Assembly |
*c | to No. 3 Junction Connector |
*d | to Absorber Control ECU |
*e | to No. 1 Junction Connector |
Reconnect the wire harness connector from the No. 1 junction connector.
Disconnect the wire harness connector from the No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/ Dynamic Radar Cruise Control System
*2: w/ Adaptive Variable Suspension System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 1 junction connector main bus line) | B |
NG (to No. 3 junction connector main bus line) | C |
NG (to Driving support ECU assembly branch bus line) | D |
NG (to Absorber control ECU branch bus line) |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here |
A |
REPLACE NO. 2 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (NO. 3 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 3 Junction Connector) |
*b | to No. 2 Junction Connector |
*c | to No. 4 Junction Connector |
*d | to Blind Spot Monitor Sensor RH |
Reconnect the wire harness connector from the No. 2 junction connector.
Disconnect the wire harness connector from the No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*: w/ Blind Spot Monitor System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 2 junction connector main bus line) | B |
NG (to No. 4 junction connector main bus line) | C |
NG (to Blind spot monitor sensor RH branch bus line) | D |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINES (NO. 4 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here |
A |
REPLACE NO. 3 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (NO. 4 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 4 Junction Connector) |
*b | to Seat Belt Control ECU |
*c | to No. 3 Junction Connector |
*d | to No. 9 Junction Connector |
*e | to Blind Spot Monitor Sensor LH |
Reconnect the wire harness connector from the No. 3 junction connector.
Disconnect the wire harness connector from the No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/ Pre-crash Safety System
*2: w/ Blind Spot Monitor System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 3 junction connector main bus line) | B |
NG (to No. 9 junction connector main bus line) | C |
NG (to Seat belt control ECU branch bus line) | D |
NG (to Blind spot monitor sensor LH branch bus line) |
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINES (ECUS) Click here |
A |
REPLACE NO. 4 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (NO. 9 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 9 Junction Connector) |
Reconnect the wire harness connector from the No. 4 junction connector.
Disconnect the wire harness connector from the No. 9 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 9 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) |
OK |
REPLACE NO. 9 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINES (ECUS)
*a | Component with harness connected (Network Gateway ECU) |
Reconnect all wire harness connectors (No. 1 junction connector, No. 2 junction connector, No. 3 junction connector and No. 4 junction connector).
Disconnect the connector that includes terminals CANH and CANL from the ECU (or sensor) to which the short-circuited branch line is connected Click here.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
Tech Tips
If the resistance becomes normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), there may be a short in the ECU (or sensor).
If the resistance does not become normal (between 54 and 69 Ω) when the connector is disconnected from the ECU (or sensor), repair or replace the short-circuited branch line or connector.
NG |
REPAIR OR REPLACE CORRESPONDING ECU WIRE |
OK |
REPLACE CORRESPONDING ECU
CHECK FOR SHORT IN CAN BUS LINE (NO. 1 JUNCTION CONNECTOR)
Disconnect the wire harness connector from the No. 1 junction connector.
*a | Rear view of wire harness connector (to No. 1 Junction Connector) |
*b | Front view of DLC3 |
*c | to Network Gateway ECU | *d | to Headlight Swivel ECU Assembly (AFS ECU) |
*e | to Power Management Control ECU | *f | to Clearance Warning ECU Assembly |
*g | to No. 2 Junction Connector | - | - |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*: w/ LEXUS Parking Assist-sensor System
Result | Proceed to |
---|---|
OK | A |
NG (to Network gateway ECU main bus line) | B |
NG (to No. 2 junction connector main bus line) | C |
NG (to Headlight swivel ECU assembly [AFS ECU] branch bus line) | D |
NG (to Power management control ECU branch bus line) | |
NG (to Clearance warning ECU assembly branch bus line) |
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
B |
CHECK FOR SHORT IN CAN BUS LINE (NETWORK GATEWAY ECU) Click here |
C |
CHECK FOR SHORT IN CAN BUS LINE (NO. 2 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here |
A |
REPLACE NO. 1 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINE (NETWORK GATEWAY ECU)
*a | Rear view of wire harness connector (to Network Gateway ECU) |
*b | Front view of DLC3 |
Reconnect the wire harness connector from the No. 1 junction connector.
Disconnect the network gateway ECU connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
NG |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NETWORK GATEWAY ECU - NO. 1 JUNCTION CONNECTOR) |
OK |
REPLACE NETWORK GATEWAY ECU Click here
CHECK FOR SHORT IN CAN BUS LINE (NO. 2 JUNCTION CONNECTOR)
Reconnect the wire harness connector from the No. 1 junction connector.
*a | Rear view of wire harness connector (to No. 2 Junction Connector) |
*b | Front view of DLC3 |
*c | to Driving Support ECU Assembly | *d | to No. 3 Junction Connector |
*e | to Absorber Control ECU | *f | to No. 1 Junction Connector |
Disconnect the wire harness connector from the No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/ Dynamic Radar Cruise Control System
*2: w/ Adaptive Variable Suspension System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 1 junction connector main bus line) | B |
NG (to No. 3 junction connector main bus line) | C |
NG (to Absorber control ECU branch bus line) | D |
NG (to Driving support ECU assembly branch bus line) |
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINE (NO. 3 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here |
A |
REPLACE NO. 2 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINE (NO. 3 JUNCTION CONNECTOR)
Reconnect the wire harness connector from the No. 2 junction connector.
*a | Rear view of wire harness connector (to No. 3 Junction Connector) |
*b | Front view of DLC3 |
*c | to No. 2 Junction Connector | *d | to No. 4 Junction Connector |
*e | to Blind Spot Monitor Sensor RH | - | - |
Disconnect the wire harness connector from the No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*: w/ Blind Spot Monitor System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 2 junction connector main bus line) | B |
NG (to No. 4 junction connector main bus line) | C |
NG (to Blind spot monitor sensor RH branch bus line) | D |
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINE (NO. 4 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here |
A |
REPLACE NO. 3 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINE (NO. 4 JUNCTION CONNECTOR)
Reconnect the wire harness connector from the No. 3 junction connector.
*a | Rear view of wire harness connector (to No. 4 Junction Connector) |
*b | Front view of DLC3 |
*c | to Seat Belt Control ECU | *d | to No. 3 Junction Connector |
*e | to No. 9 Junction Connector | *f | to Blind Spot Monitor Sensor LH |
Disconnect the wire harness connector from the No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
*1: w/ Pre-crash Safety System
*2: w/ Blind Spot Monitor System
Result | Proceed to |
---|---|
OK | A |
NG (to No. 3 junction connector main bus line) | B |
NG (to No. 9 junction connector main bus line) | C |
NG (to Seat belt control ECU branch bus line) | D |
NG (to Blind spot monitor sensor LH branch bus line) |
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
B |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
C |
CHECK FOR SHORT IN CAN BUS LINE (NO. 9 JUNCTION CONNECTOR) Click here |
D |
CHECK FOR SHORT IN CAN BUS LINE (ECUS) Click here |
A |
REPLACE NO. 4 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINE (NO. 9 JUNCTION CONNECTOR)
*a | Rear view of wire harness connector (to No. 9 Junction Connector) |
*b | Front view of DLC3 |
Reconnect the wire harness connector from the No. 4 junction connector.
Disconnect the wire harness connector from the No. 9 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
NG |
REPAIR OR REPLACE CAN MAIN WIRE BUS LINE OR CONNECTOR (NO. 9 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) |
OK |
REPLACE NO. 9 JUNCTION CONNECTOR
CHECK FOR SHORT IN CAN BUS LINE (ECUS)
*a | Component with harness connected (Network Gateway ECU) |
Reconnect all wire harness connectors (No. 1 junction connector, No. 2 junction connector, No. 3 junction connector and No. 4 junction connector).
Disconnect the connector that includes terminals CANH and CANL from the ECU to which the bus line shorted to B+ or shorted to GND is connected.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Tech Tips
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check Sub Bus 2*1 or Sub Bus 18*2 inspection.
If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.
*1: w/o Dynamic Rear Steering System
*2: w/ Dynamic Rear Steering System
NG |
REPAIR OR REPLACE CORRESPONDING ECU WIRE |
OK |
REPLACE CORRESPONDING ECU