- Short to B+
| Last Modified: 4-30-2014 | 6.6 J | Doc ID: RM000000WIT005X |
| Model Year: 2006 | Model: LX470 | Prod Date Range: [05/2005 - ] |
| Title: CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Short to B+ in CAN Bus Line; 2006 MY LX470 [05/2005 - ] | ||
|
Short to B+ in CAN Bus Line |
DESCRIPTION
There may be a short circuit between the CAN bus line and B+ when the resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3.
|
Symptom |
Trouble Area |
|---|---|
|
There is resistance between terminals 6 (CANH) and 16 (BAT) or 14 (CANL) and 16 (BAT) of DLC3. |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK CAN BUS LINES FOR SHORT TO B+ (DLC3 SUB BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the J34 DLC3 sub bus line connector from the junction connector B side.
NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| NG |
|
|
|
2. |
CONNECT CONNECTOR |
(a) Reconnect the J34 DLC3 sub bus line connector to the junction connector B side.
|
|
3. |
CHECK CAN BUS LINES FOR SHORT TO B+ (ECM MAIN BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the J31 ECM main bus line connector from the junction connector B side.
NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| OK |
|
|
|
4. |
CONNECT CONNECTOR |
(a) Reconnect the J31 ECM main bus line connector to the junction connector B side.
|
|
5. |
CHECK CAN BUS LINES FOR SHORT TO B+ (GATEWAY ECU MAIN BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the J32 gateway ECU main bus line connector from the junction connector B side.
NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| OK |
|
|
|
6. |
CONNECT CONNECTOR |
(a) Reconnect the J32 gateway ECU main bus line connector to the junction connector B side.
|
|
7. |
CHECK CAN BUS LINES FOR SHORT TO B+ (TRANSLATE ECU SUB BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the T39 translate ECU connector.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| OK |
|
| NG |
|
REPAIR OR REPLACE TRANSLATE ECU SUB BUS LINE AND CONNECTOR (CAN-H, CAN-L) |
|
8. |
CONNECT CONNECTOR |
(a) Reconnect the J31 ECM main bus line connector to the junction connector B side.
|
|
9. |
CHECK CAN BUS LINES FOR SHORT TO B+ (ECM MAIN BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the E9 ECM connector.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| OK |
|
| NG |
|
REPAIR OR REPLACE ECM MAIN BUS LINE AND CONNECTOR (CAN-H, CAN-L) |
|
10. |
CONNECT CONNECTOR |
(a) Reconnect the J32 gateway ECU main bus line connector to the junction connector B side.
|
|
11. |
CHECK CAN BUS LINES FOR SHORT TO B+ (GATEWAY ECU MAIN BUS LINE) |
|
(a) Disconnect the cable from the negative (-) battery terminal. |
|
(b) Disconnect the G5 gateway ECU connector.
|
(c) Measure the resistance of the DLC3. Standard resistance:
|
|
| OK |
|
| NG |
|
REPAIR OR REPLACE GATEWAY ECU MAIN BUS LINE AND CONNECTOR (CAN-H, CAN-L) |
|
|