TERMINALS OF ECU
CHECK 4WD ECU ASSEMBLY
(a) Measure the voltage and resistance of the connector.
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition |
---|---|---|---|---|
K145-6 (CANH) - K145-5 (CANL) |
P - W | HIGH-level CAN bus wire - LOW-level CAN bus wire |
Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
K145-4 (GND) - Body ground |
W-B - Body ground | Ground |
Always | Below 1 Ω |
K145-3 (IG1) - K145-4 (GND) |
SB - W-B | Power source voltage |
Ignition switch ON | 11 to 14 V |
K145-2 (SLC+) - K145-1 (SLC-) |
W - B | 4WD linear solenoid signal |
D position, engine idling |
Pulse generation (See waveform 1) |
If the result is not as specified, the 4WD ECU assembly may have a malfunction.
(b) Using an oscilloscope, check the waveform 1.
Waveform 1 (Reference)
Item | Content |
---|---|
Terminal No. (Symbol) |
K145-2 (SLC+) - K145-1 (SLC-) |
Tester Range | 2 V/DIV., 1 msec./DIV. |
Condition | D position, engine idling |