Part 3
NETWORKING: CAN COMMUNICATION SYSTEM: U1002: Lost Communication with Gateway Module (Main Body)
U1002 - Lost Communication with Gateway Module (Main Body) Continued
22. CHECK FOR SHORT IN CAN MS BUS WIRE (TILT AND TELESCOPIC ECU)
(a) Disconnect the tilt and telescopic ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check CAN MS Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN MS Bus Wire inspection.
NG -- CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 8)
OK -- REPLACE MULTIPLEX TILT AND TELESCOPIC ECU Removal
23. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 8)
(a) Disconnect the CAN No. 8 junction connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
Result:
D -- CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 6 MAIN WIRE)
C -- CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 7 MAIN WIRE)
B -- REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR (CAN NO. 8 J/C - TILT AND TELESCOPIC ECU)
A -- Continue to next step.
24. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 8 BRANCH WIRE)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check CAN MS Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN MS Bus Wire inspection.
NG -- CHECK FOR CAN MS BUS BRANCH WIRE
OK -- REPLACE CAN NO. 8 JUNCTION CONNECTOR
25. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 7 MAIN WIRE)
(a) Disconnect the CAN No. 7 junction connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check CAN MS Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN MS Bus Wire inspection.
Result:
C -- CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 6 MAIN WIRE)
B -- REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR (CAN NO. 7 J/C - CAN NO. 8 J/C)
A -- Continue to next step.
26. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 7 BRANCH WIRE)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CHECK FOR CAN MS BUS BRANCH WIRE
OK -- REPLACE CAN NO. 7 JUNCTION CONNECTOR
27. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 6 MAIN WIRE)
(a) Disconnect the CAN No. 6 junction connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check CAN MS Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN MS Bus Wire inspection.
Result:
D -- CHECK FOR SHORT IN CAN MS BUS WIRE
C -- REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR (CAN NO. 6 J/C - CAN NO. 8 J/C)
B -- REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR (CAN NO. 6 J/C - CAN NO. 7 J/C)
A -- Continue to next step.
28. CHECK FOR SHORT IN CAN MS BUS WIRE (CAN J/C NO. 6 BRANCH WIRE)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CHECK FOR CAN MS BUS BRANCH WIRE
OK -- REPLACE CAN NO. 6 JUNCTION CONNECTOR
29. CHECK FOR SHORT IN CAN MS BUS WIRE
(a) Disconnect the main body ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
It is only necessary to perform the inspection in the above table for the result (short circuit) that was obtained in the Check CAN MS Bus Wire inspection.
Find the necessary inspection from the Purpose column that matches the result in the Result column from the Check CAN MS Bus Wire inspection.
NG -- REPAIR OR REPLACE CAN MS BUS MAIN WIRE OR CONNECTOR (CAN NO. 6 J/C - MAIN BODY ECU)
OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal
30. CHECK FOR CAN MS BUS BRANCH WIRE
(a) Reconnect the connector for the bus wire that is shorted to +B or GND to the CAN junction connector (the connector that caused the bus wire resistance to change to 6 kOhms or higher (for +B short) or 200 Ohms or higher (for ground short) when it was disconnected).
(b) Disconnect the ECU or sensor connected to the CAN bus wire that is shorted to +B or GND.
HINT
If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus wires. To determine the ECU or sensor that is connected to the shorted bus wire, refer to the terminals of ECU tables CAN Communication System.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
If the resistance becomes abnormal when the connector is disconnected from the ECU, there may be a short in the ECU.
NG -- REPAIR OR REPLACE CAN MS BUS BRANCH WIRE OR CONNECTOR
OK -- REPLACE CORRESPONDING ECU