CAN COMMUNICATION SYSTEM > Check CAN Bus Lines for Short Circuit (RHD Models) |
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DESCRIPTION
There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is below 54 Ω.Symptom | Trouble Area |
The resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is below 54 Ω. |
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- *1: w/ Anti-lock Brake System
- *2: w/ Vehicle Stability Control System
- *3: for 4WD
- *4: for 2WD (w/ Vehicle Stability Control System) and 4WD
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Turn the ignition switch off before measuring the resistance of the main wire and the branch wire.
- After the ignition switch is turned off, check that the key reminder warning system and light reminder buzzer are not in operation.
- Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.
- HINT:
- Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
1.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the main wire and the branch wire.
- CAUTION:
- Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
- NOTICE:
- w/ Navigation System (for HDD):
After the ignition switch is turned off, the HDD navigation system requires approximately a minute to record various types of memory and settings. As a result, after turning the ignition switch off, wait a minute or higher before disconnecting the cable from the negative (-) battery terminal. - When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
NEXT | |
2.CHECK CAN BUS LINES FOR SHORT CIRCUIT (DLC3 BRANCH WIRE) |
Disconnect the E89 No. 4 junction connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 200 Ω or higher
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OK | |
3.CONNECT CONNECTOR |
Reconnect the E89 No. 4 junction connector.
NEXT | |
4.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR SIDE) |
Disconnect the A51 No. 1 junction connector.
Measure the resistance of the DLC3.
Result Tester Connection Switch Condition Specified Condition Proceed to E16-6 (CANH) - E16-14 (CANL) Ignition switch off 108 to 132 Ω B E16-6 (CANH) - E16-14 (CANL) Ignition switch off Other A
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A | |
5.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) |
Disconnect the E87 No. 2 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E87-4 (CANH) - E87-15 (CANL) Ignition switch off 6 kΩ or higher
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OK | |
6.CONNECT CONNECTOR |
Reconnect the A51 No. 1 junction connector.
Reconnect the E87 No. 2 junction connector.
NEXT | |
7.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR, NO. 2 JUNCTION CONNECTOR SIDE) |
Disconnect the E87 No. 2 junction connector.
Measure the resistance of the DLC3.
Result Tester Connection Switch Condition Specified Condition Proceed to E16-6 (CANH) - E16-14 (CANL) Ignition switch off 108 to 132 Ω B E16-6 (CANH) - E16-14 (CANL) Ignition switch off Other A
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A | |
8.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 2 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR) |
Disconnect the E77 No. 3 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E77-3 (CANH) - E77-14 (CANL) Ignition switch off 6 kΩ or higher
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OK | |
9.CONNECT CONNECTOR |
Reconnect the E87 No. 2 junction connector.
Reconnect the E77 No. 3 junction connector.
NEXT | |
10.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR, NO. 2 JUNCTION CONNECTOR, NO. 3 JUNCTION CONNECTOR SIDE) |
Disconnect the E77 No. 3 junction connector.
Measure the resistance of the DLC3.
Result Tester Connection Switch Condition Specified Condition Proceed to E16-6 (CANH) - E16-14 (CANL) Ignition switch off 108 to 132 Ω B E16-6 (CANH) - E16-14 (CANL) Ignition switch off Other A
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A | |
11.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 3 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR) |
Disconnect the E89 No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E89-6 (CANH) - E89-17 (CANL) Ignition switch off 6 kΩ or higher
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OK | |
12.CONNECT CONNECTOR |
Reconnect the E77 No. 3 junction connector.
Reconnect the E89 No. 4 junction connector.
NEXT | |
13.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 4 JUNCTION CONNECTOR - 4WD CONTROL ECU) |
- NOTICE:
- For vehicles without 4WD, go to "Check CAN Bus Lines for Short Circuit (No. 4 Junction Connector - Steering Angle Sensor)".
Disconnect the E88 No. 4 junction connector.
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E88-6 (CANH) - E88-17 (CANL) Ignition switch off Below 1 Ω B E88-6 (CANH) - E88-17 (CANL) Ignition switch off Other A
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A | |
14.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 4 JUNCTION CONNECTOR - STEERING ANGLE SENSOR) |
- NOTICE:
- For vehicles without 2WD with vehicle stability control system and 4WD, go to "Check CAN Bus Lines for Short Circuit (No. 4 Junction Connector - Combination Meter ECU)".
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E88-7 (CANH) - E88-18 (CANL) Ignition switch off Below 1 Ω B E88-7 (CANH) - E88-18 (CANL) Ignition switch off Other A
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A | |
15.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 4 JUNCTION CONNECTOR - COMBINATION METER ECU) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E88-5 (CANH) - E88-16 (CANL) Ignition switch off Below 1 Ω B E88-5 (CANH) - E88-16 (CANL) Ignition switch off Other A
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A | ||
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16.CONNECT CONNECTOR |
Reconnect the E88 No. 4 junction connector.
NEXT | |
17.CHECK CAN BUS LINES FOR SHORT CIRCUIT (4WD CONTROL ECU) |
Disconnect the E67 4WD control ECU connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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18.CONNECT CONNECTOR |
Reconnect the E88 No. 4 junction connector.
NEXT | |
19.CHECK CAN BUS LINES FOR SHORT CIRCUIT (STEERING ANGLE SENSOR) |
Disconnect the E95 steering angle sensor connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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20.CONNECT CONNECTOR |
Reconnect the E88 No. 4 junction connector.
NEXT | |
21.CHECK CAN BUS LINES FOR SHORT CIRCUIT (COMBINATION METER ECU) |
Disconnect the E22 combination meter ECU connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 108 to 132 Ω
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OK | ||
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22.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR) |
- NOTICE:
- For vehicles without anti-lock brake system, go to "Check CAN Bus Lines for Short Circuit (No. 1 Junction Connector - ABS and Traction Actuator)".
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to A51-1 (CANH) - A51-12 (CANL) Ignition switch off Below 1 Ω B A51-1 (CANH) - A51-12 (CANL) Ignition switch off Other A
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A | |
23.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR - ABS AND TRACTION ACTUATOR) |
- NOTICE:
- For vehicles without vehicle stability control system, go to "Check CAN Bus Lines for Short Circuit (No. 1 Junction Connector - ECM)".
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to A51-1 (CANH) - A51-12 (CANL) Ignition switch off Below 1 Ω B A51-1 (CANH) - A51-12 (CANL) Ignition switch off Other A
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A | |
24.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 1 JUNCTION CONNECTOR - ECM) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to A51-2 (CANH) - A51-13 (CANL) Ignition switch off Below 1 Ω B A51-2 (CANH) - A51-13 (CANL) Ignition switch off Other A
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A | ||
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25.CONNECT CONNECTOR |
Reconnect the A51 No. 1 junction connector.
NEXT | |
26.CHECK CAN BUS LINES FOR SHORT CIRCUIT (BRAKE ACTUATOR) |
Disconnect the A27 brake actuator (skid control ECU) connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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27.CONNECT CONNECTOR |
Reconnect the A51 No. 1 junction connector.
NEXT | |
28.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ABS AND TRACTION ACTUATOR) |
Disconnect the A67 ABS and traction actuator (skid control ECU) connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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29.CONNECT CONNECTOR |
Reconnect the A51 No. 1 junction connector.
NEXT | |
30.CHECK CAN BUS LINES FOR SHORT CIRCUIT (ECM) |
Disconnect the A12 ECM connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 108 to 132 Ω
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OK | ||
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31.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR) |
- NOTICE:
- For vehicles without vehicle stability control system, go to "Check CAN Bus Lines for Short Circuit (No. 2 Junction Connector - Main Body ECU)".
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E87-2 (CANH) - E87-13 (CANL) Ignition switch off Below 1 Ω B E87-2 (CANH) - E87-13 (CANL) Ignition switch off Other A
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A | |
32.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E87-5 (CANH) - E87-16 (CANL) Ignition switch off Below 1 Ω B E87-5 (CANH) - E87-16 (CANL) Ignition switch off Other A
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A | ||
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33.CONNECT CONNECTOR |
Reconnect the E87 No. 2 junction connector.
NEXT | |
34.CHECK CAN BUS LINES FOR SHORT CIRCUIT (YAW RATE SENSOR) |
Disconnect the K25 yaw rate sensor connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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35.CONNECT CONNECTOR |
Reconnect the E87 No. 2 junction connector.
NEXT | |
36.CHECK CAN BUS LINES FOR SHORT CIRCUIT (MAIN BODY ECU) |
Disconnect the E20 main body ECU connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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37.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 3 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E77-2 (CANH) - E77-13 (CANL) Ignition switch off Below 1 Ω B E77-2 (CANH) - E77-13 (CANL) Ignition switch off Other A
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A | |
38.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 3 JUNCTION CONNECTOR - POWER STEERING ECU) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E77-4 (CANH) - E77-15 (CANL) Ignition switch off Below 1 Ω B E77-4 (CANH) - E77-15 (CANL) Ignition switch off Other A
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A | |
39.CHECK CAN BUS LINES FOR SHORT CIRCUIT (NO. 3 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY) |
Measure the resistance according to the value(s) in the table below.
Result Tester Connection Switch Condition Specified Condition Proceed to E77-1 (CANH) - E77-12 (CANL) Ignition switch off Below 1 Ω B E77-1 (CANH) - E77-12 (CANL) Ignition switch off Other A
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A | ||
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40.CONNECT CONNECTOR |
Reconnect the E77 No. 3 junction connector.
NEXT | |
41.CHECK CAN BUS LINES FOR SHORT CIRCUIT (AIR CONDITIONING AMPLIFIER) |
Disconnect the E41*1 or E42*2 air conditioning amplifier connector.
- *1: for Automatic Air Conditioning System
- *2: for Manual Air Conditioning System
- *1: for Automatic Air Conditioning System
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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42.CONNECT CONNECTOR |
Reconnect the E77 No. 3 junction connector.
NEXT | |
43.CHECK CAN BUS LINES FOR SHORT CIRCUIT (POWER STEERING ECU) |
Disconnect the E21 power steering ECU connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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44.CONNECT CONNECTOR |
Reconnect the E77 No. 3 junction connector.
NEXT | |
45.CHECK CAN BUS LINES FOR SHORT CIRCUIT (CENTER AIRBAG SENSOR ASSEMBLY) |
Disconnect the E49 center airbag sensor connector.
Measure the resistance of the DLC3.
- Standard Resistance:
Tester Connection Switch Condition Specified Condition E16-6 (CANH) - E16-14 (CANL) Ignition switch off 54 to 69 Ω
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OK | ||
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