DESCRIPTION
There may be an open circuit in the CAN bus main wire and/or the DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 Ω or higher.
Symptom |
Trouble Area |
---|---|
Resistance between terminals 6 (CANH) and 14 (CANL) of DLC3 is 70 Ω or higher. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
PROCEDURE
1. |
CHECK FOR OPEN IN CAN BUS WIRE (DLC3 BRANCH WIRE) |
(a) Turn the ignition switch off.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
NOTICE: When the measured value is 133 Ω or higher and a CAN communication system
DTC 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 after repairing the trouble area (See page
|
|
NG | ![]() |
REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 |
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (ECM) |
(a) for 1AR-FE engine:
(1) Disconnect the ECM connector (A49). Text in Illustration
|
|
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A49-13 (CANH) - A49-5 (CANL) |
Ignition switch off |
108 to 132 Ω |
(b) for 2GR-FE engine:
(1) Disconnect the ECM connector (A41). Text in Illustration
|
|
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A41-10 (CANH) - A41-11 (CANL) |
Ignition switch off |
108 to 132 Ω |
Result |
Proceed to |
---|---|
OK (for 1AR-FE engine) |
A |
OK (for 2GR-FE engine) |
B |
NG |
C |
A | ![]() |
REPLACE ECM |
B | ![]() |
REPLACE ECM |
|
3. |
CHECK FOR OPEN IN CAN BUS WIRE (COMBINATION METER) |
(a) Reconnect the ECM connector.
(b) Disconnect the combination meter connector (E1). Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
E1-1 (CANH) - E1-9 (CANL) |
Ignition switch off |
108 to 132 Ω |
OK | ![]() |
REPLACE COMBINATION METER |
|
4. |
CHECK FOR OPEN IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - ECM) |
(a) Reconnect the combination meter connector.
(b) Disconnect the CAN No. 1 junction connector (A44). Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A44-4 (CANH) - A44-15 (CANL) |
Ignition switch off |
108 to 132 Ω |
NG | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - ECM) |
|
5. |
CHECK FOR OPEN IN CAN BUS WIRE (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR) |
(a) Reconnect the CAN No. 1 junction connector (A44).
(b) Disconnect the CAN No. 1 junction connector (D56). Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
D56-9 (CANH) - D56-20 (CANL) |
Ignition switch off |
108 to 132 Ω |
OK | ![]() |
REPLACE CAN NO. 1 JUNCTION CONNECTOR |
|
6. |
CHECK FOR OPEN IN CAN BUS WIRE (CAN NO. 2 JUNCTION CONNECTOR) |
(a) Reconnect the CAN No. 1 junction connector (D56).
(b) Disconnect the CAN No. 2 junction connector. Text in Illustration
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
Connect to |
---|---|---|---|
D68-8 (CANH) - D68-19 (CANL) |
Ignition switch off |
108 to 132 Ω |
Combination meter |
D68-9 (CANH) - D68-20 (CANL) |
Ignition switch off |
108 to 132 Ω |
CAN No. 1 junction connector |
Result |
Proceed to |
---|---|
OK |
A |
NG (to Combination meter main wire) |
B |
NG (to CAN No. 1 junction connector) |
C |
A | ![]() |
REPLACE CAN NO. 2 JUNCTION CONNECTOR |
B | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - COMBINATION METER) |
C | ![]() |
REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 JUNCTION CONNECTOR - CAN NO. 2 JUNCTION CONNECTOR) |
Removal
REMOVAL
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The procedure listed below is for the LH side.
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds aft ...
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Diagnosis System
DIAGNOSIS SYSTEM
1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
(a) CAN No. 1 Bus
(1) ECM
(2) Main body ECU (Driver side junction block)
(3) Combination meter
(4) Power steering ECU
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