TERMINALS OF ECU
1. CHECK 4 WHEEL DRIVE CONTROL ECU
*a |
Component with harness connected (4 Wheel Drive Control ECU) |
- |
- |
(a) Measure the resistance and voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F13-1 (4WD) - F12-10 (GND) |
BE - W-B*3 LG - W-B*4 |
4WD detection switch signal input |
Ignition switch ON Transfer position 2WD |
10 to 14 V |
Ignition switch ON Transfer position 4WD |
Below 1.5 V |
|||
F13-2 (ADD) - F12-10 (GND) |
G - W-B |
A.D.D. position switch input |
Ignition switch ON Transfer position 2WD (A.D.D. actuator Free) |
10 to 14 V |
Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock) |
Below 1.5 V |
|||
F13-3 (4WDL) - F12-10 (GND) |
Y - W-B |
L4 detection switch signal input |
Ignition switch ON Transfer position not in L4 |
10 to 14 V |
Ignition switch ON Transfer position L4 |
Below 1.5 V |
|||
F13-5 (DT) - F13-25 (DGND) |
BE - V |
Oil temperature sensor signal input |
Ignition switch ON |
0.9 to 4.9 V |
F13-7 (DL2) - F12-10 (GND) |
P - W-B |
A.D.D. actuator limit switch input |
Ignition switch ON Transfer position 2WD (A.D.D. actuator Free) |
10 to 14 V |
Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock) |
Below 1.5 V |
|||
F13-8 (DL1) - F12-10 (GND) |
LG - W-B |
A.D.D. actuator limit switch input |
Ignition switch ON Transfer position 2WD (A.D.D. actuator Free) |
Below 1.5 V |
Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock) |
10 to 14 V |
|||
F13-9 (TL3) - F12-10 (GND) |
B - W-B |
Transfer shift actuator limit switch input |
Ignition switch ON TL3 terminal limit switch off (transfer 2WD or L4) |
10 to 14 V |
Ignition switch ON TL3 terminal limit switch on (transfer H4) |
Below 1.5 V |
|||
F13-10 (TL2) - F12-10 (GND) |
SB - W-B |
Transfer shift actuator limit switch input |
Ignition switch ON TL2 terminal limit switch off (transfer 2WD or H4) |
10 to 14 V |
Ignition switch ON TL2 terminal limit switch on (transfer L4) |
Below 1.5 V |
|||
F13-11 (TL1) - F12-10 (GND) |
Y - W-B |
Transfer shift actuator limit switch input |
Ignition switch ON TL1 terminal limit switch off (transfer H4 or L4) |
10 to 14 V |
Ignition switch ON TL1 terminal limit switch on (transfer 2WD) |
Below 1.5 V |
|||
F13-13 (LO) - F12-10 (GND) |
V - W-B |
Transfer position switch input |
Ignition switch ON Transfer position switch 2WD |
10 to 14 V |
Ignition switch ON Transfer position switch H4 |
Below 1.5 V |
|||
Ignition switch ON Transfer position switch L4 |
Below 1.5 V |
|||
F13-14 (2-4) - F12-10 (GND) |
GR - W-B |
Transfer position switch input |
Ignition switch ON Transfer position switch 2WD |
Below 1.5 V |
Ignition switch ON Transfer position switch H4 |
Below 1.5 V |
|||
Ignition switch ON Transfer position switch L4 |
10 to 14 V |
|||
F13-18 (MTN) - F12-10 (GND)*2 |
V - W-B |
Clutch start switch input |
Ignition switch ON Clutch pedal released |
10 to 14 V |
Ignition switch ON Clutch pedal depressed |
Below 2 V |
|||
F13-20 (CANH) - F13-40 (CANL) |
BE - W |
HIGH-level CAN bus wire - LOW-level CAN bus wire |
Ignition switch off Cable disconnected from negative (-) battery terminal |
54 to 69 Ω |
F13-21 (+B) - F12-10 (GND) |
W - W-B |
ECU power supply |
Always |
11 to 14 V |
F12-2 (DM1) - F12-10 (GND) |
R - W-B |
A. D. D. shift motor output |
Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation) |
Pulse generation (see waveform 1) |
F12-4 (IG) - F12-10 (GND) |
Y - W-B |
ECU and actuator power supply |
Ignition switch ON |
11 to 14 V |
F12-6 (DM2) - F12-10 (GND) |
SB - W-B |
A. D. D. shift motor output |
Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation) |
Pulse generation (see waveform 1) |
F12-7 (TM2) - F12-10 (GND) |
L - W-B |
Transfer shift motor output |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4) |
Pulse generation (see waveform 2) |
F12-8 (TM1) - F12-10 (GND) |
G - W-B |
Transfer shift motor output |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from L4 to H4 (switching from L4 to H4) |
Pulse generation |
F12-10 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(b) Waveform 1
(1) When a gear is engaged and switching is performed
Item |
Content |
---|---|
Tester Connection |
F12-2 (DM1) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 100 ms./DIV. |
Condition |
Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation) |
Item |
Content |
---|---|
Tester Connection |
F12-6 (DM2) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 100 ms./DIV. |
Condition |
Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation) |
(2) When a gear is not engaged and switching is not performed
Item |
Content |
---|---|
Tester Connection |
F12-2 (DM1) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 500 ms./DIV. |
Condition |
Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation) |
Item |
Content |
---|---|
Tester Connection |
F12-6 (DM2) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 500 ms./DIV. |
Condition |
Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation) |
(c) Waveform 2
(1) When a gear is engaged and switching is performed
Item |
Content |
---|---|
Tester Connection |
F12-8 (TM1) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 100 ms./DIV. |
Condition |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from L4 to H4 (switching from L4 to H4) |
Item |
Content |
---|---|
Tester Connection |
F12-7 (TM2) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 100 ms./DIV. |
Condition |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4) |
(2) When a gear is not engaged and switching is not performed
Item |
Content |
---|---|
Tester Connection |
F12-8 (TM1) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 1 s./DIV. |
Condition |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from L4 to H4 (switching from L4 to H4) |
Item |
Content |
---|---|
Tester Connection |
F12-7 (TM2) - F12-10 (GND) |
Tool Setting |
5 V/DIV., 1 s./DIV. |
Condition |
Ignition switch ON Shift lever in N*1 Shift lever in neutral*2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4) |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT CURTAIN SHIELD AIRBAG ASSEMBLY (for Vehicle not Involved in Collision)
(a) Perform a Diagnostic System Check (See page
).
(b) With the curtain shield airbag installed on the vehicle, perform
a visual check. If any of the defects mention ...
How To Proceed With Troubleshooting
HOW TO PROCEED WITH TROUBLESHOOTING
1. OPERATION FLOW
HINT:
Perform troubleshooting in accordance with the procedures below. The following
is an outline of basic troubleshooting procedures. Confirm the troubleshooting procedures
for the circuit you are working on before beginning troubleshoot ...
Taillight Relay Circuit
DESCRIPTION
The main body ECU (multiplex network body ECU) controls the operation of the
TAIL relay.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing
the following inspection procedure.
If the main body EC ...