Part 2
NETWORKING: CAN COMMUNICATION SYSTEM: Check CAN Bus Lines for Short Circuit
- Check CAN Bus Lines for Short Circuit (Continued)
7. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 2 J/C - STEERING ANGLE SENSOR)
(a) Disconnect the steering angle sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 2 J/C - STEERING ANGLE SENSOR)
OK -- Continue to next step.
8. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 2 J/C - AIRBAG ECU)
(a) Disconnect the airbag sensor assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 2 J/C - AIRBAG SENSOR ASSEMBLY)
OK -- Continue to next step.
9. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 2 J/C - CERTIFICATION ECU)
(a) Disconnect the certification ECU (smart key ECU assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 2 J/C - CERTIFICATION ECU)
OK -- Continue to next step.
10. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 2 J/C)
(a) Reconnect the wire harness connector to the CAN No. 2 junction connector front side and rear side.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NOTICE:
* The resistance must be measured after the main line connected ECUs (ECM and combination meter assembly), CAN No. 1 junction connector, CAN No. 2 junction connector and CAN No. 3 junction connector are reconnected.
* The resistance must be measured after the CAN No. 2 junction connector branch line connected ECU and sensor connectors are disconnected.
NG -- REPLACE CAN NO. 2 JUNCTION CONNECTOR
OK -- Continue to next step.
11. CHECK FOR SHORT IN CONNECTED COMPONENT (ECU, SENSOR)
(a) Connect the probes of an ohmmeter to terminals 6 (CANH) and 14 (CANL) of the DLC3.
Text in Illustration
(b) While observing the resistance value shown on the ohmmeter, reconnect each ECU and sensor connector until the resistance becomes abnormal (Below 54 Ohms).
HINT
If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.
NEXT -- REPLACE CORRESPONDING ECU OR SENSOR
12. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 2 J/C - CAN NO. 1 J/C)
(a) Reconnect the wire harness connector to the CAN No. 2 junction connector rear side.
(b) Disconnect the instrument panel wire from the CAN No. 1 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 1 J/C)
OK -- Continue to next step.
13. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 1 J/C - MAIN BODY ECU)
(a) Disconnect the main body ECU (multiplex network body ECU) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 1 J/C - MAIN BODY ECU)
OK -- Continue to next step.
14. CHECK FOR SHORT IN CAN BUS LINES (CAN NO. 1 J/C - SKID CONTROL ECU)
(a) Disconnect the engine room main wire from the CAN No. 1 junction connector.
(b) Disconnect the skid control ECU (brake booster with master cylinder assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CAN NO. 1 J/C - SKID CONTROL ECU)
OK -- Continue to next step.