DESCRIPTION
There may be an open circuit in the CAN main wire and/or DLC3 CAN branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher.
Symptom | Trouble Area |
---|---|
The resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ω or higher. |
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WIRING DIAGRAM
INSPECTION PROCEDURE
Tech Tips
Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
PRECAUTION
Note
After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.
NEXT |
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
Note
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.
NEXT |
CHECK FOR OPEN IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - DLC3)
*1 | DLC3 |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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Note
When the measured value is 133 Ω or higher and a CAN communication system diagnostic trouble code is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting" Click here after repairing the trouble area.
NG |
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL) |
OK |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM)
*1 | Rear view of wire harness connector (to No. 2 Junction Connector) |
Disconnect the E69 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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NG |
CONNECT CONNECTOR Click here |
OK |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
*1 | Rear view of wire harness connector (to No. 2 Junction Connector) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CONNECT CONNECTOR Click here |
OK |
REPLACE NO. 2 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the E69 No. 2 junction connector.
NEXT |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM)
*1 | Rear view of wire harness connector (to No. 1 Junction Connector) |
Disconnect the E72 No. 1 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CONNECT CONNECTOR Click here |
OK |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
*1 | Rear view of wire harness connector (to No. 1 Junction Connector) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
OK |
REPLACE NO. 1 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the E72 No. 1 junction connector.
NEXT |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 JUNCTION CONNECTOR)
*1 | Front view of wire harness connector (to ECM) |
Disconnect the A53 ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
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Result | Proceed to |
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OK (for 1UR-FE) | A |
OK (for 3UR-FE) | B |
NG | C |
B |
REPLACE ECM Click here |
C |
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 1 JUNCTION CONNECTOR) |
A |
REPLACE ECM Click here
CONNECT CONNECTOR
Reconnect the E69 No. 2 junction connector.
NEXT |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
*1 | Rear view of wire harness connector (to No. 3 Junction Connector) |
Disconnect the E75 No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
CONNECT CONNECTOR Click here |
OK |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
*1 | Rear view of wire harness connector (to No. 3 Junction Connector) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
OK |
REPLACE NO. 3 JUNCTION CONNECTOR
CONNECT CONNECTOR
Reconnect the E75 No. 3 junction connector.
NEXT |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION CONNECTOR)
*1 | Front view of wire harness connector (to Combination Meter Assembly) |
Disconnect the E77 combination meter assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (COMBINATION METER ASSEMBLY - NO. 3 JUNCTION CONNECTOR) |
OK |
REPLACE COMBINATION METER ASSEMBLY Click here