DESCRIPTION
Detection Item |
Symptom |
Trouble Area |
---|---|---|
4WD Control ECU Communication Stop Mode |
Either condition is met:
|
|
HINT:
For vehicles with four wheel drive only.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.
PROCEDURE
1. |
DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL |
(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and branch wire.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable
is reconnected (See page ).
|
2. |
CHECK FOR OPEN IN CAN BUS WIRE (FOUR WHEEL DRIVE CONTROL ECU BRANCH WIRE) |
(a) Disconnect the F47 four wheel drive control ECU connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F47-19 (CANH) - F47-20 (CANL) |
Ignition switch off |
54 to 69 Ω |
*a |
Rear view of wire harness connector (to Four Wheel Drive Control ECU) |
NG | ![]() |
REPAIR OR REPLACE FOUR WHEEL DRIVE CONTROL ECU BRANCH WIRE OR CONNECTOR (CANH, CANL) |
|
3. |
CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BATTERY AND BODY GROUND) |
(a) Connect the cable to the negative (-) battery terminal. NOTICE: When disconnecting the cable, some systems need to be initialized after
the cable is reconnected (See page |
|
(b) Disconnect the F46 four wheel drive control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F46-4 (GND) - Body ground |
Always |
Below 1 Ω |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F46-3 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
*a |
Rear view of wire harness connector (to Four Wheel Drive Control ECU) |
Result |
Proceed to |
---|---|
OK (for VF2A) |
A |
OK (for VF4BM) |
B |
OK (for VF2BM) |
C |
NG |
D |
A | ![]() |
REPLACE NO. 2 FOUR WHEEL DRIVE CONTROL ECU |
B | ![]() |
REPLACE NO. 2 FOUR WHEEL DRIVE CONTROL ECU |
C | ![]() |
REPLACE NO. 2 FOUR WHEEL DRIVE CONTROL ECU |
D | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
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