TERMINALS OF ECU
1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F9-15 (SPD) - 2B-4 (GND1) |
R - W-B |
Speed signal |
Vehicle speed at lower than 8 km/h (5 mph) |
11 to 14 V |
Vehicle speed at 8 km/h (5 mph) or more |
Below 1 V |
If the result is not as specified, the main body ECU may have a malfunction.
2. CHECK SIDE AUTO STEP CONTROLLER ECU ASSEMBLY
(a) Disconnect the A41 side auto step controller ECU assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A41-1 (GND) - Body Ground |
W-B - Body Ground |
Ground |
Always |
Below 1 Ω |
A41-4 (B) - A41-1 (GND) |
L - W-B |
Battery power supply |
Always |
11 to 14 V |
HINT:
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the A41 side auto step controller ECU assembly connector.
(d) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A41-5 (SSR-) - A41-1 (GND) |
GR - W-B |
Ground |
Always |
Below 1 Ω |
A41-9 (SSR2) - A41-1 (GND) |
L - W-B |
Side auto step motor hall sensor RH signal |
When the automatic running board RH is being deployed or stowed |
Pulse generation (See waveform 1) |
A41-10 (SSR1) - A41-1 (GND) |
W - W-B |
Side auto step motor hall sensor LH signal |
When the automatic running board LH is being deployed or stowed |
Pulse generation (See waveform 1) |
A41-14 (SSR+) - A41-1 (GND) |
LG - W-B |
Side auto step hall sensor power supply |
When the automatic running board is being deployed or stowed |
8 to 11 V |
A42-1 (DPL2) - A41-1 (GND) |
G - W-B |
Side auto step motor RH operation signal |
Passenger side door is opened When the automatic running board RH is being deployed |
11 to 14 V |
A42-2 (STW2) - A41-1 (GND) |
R - W-B |
Side auto step motor RH operation signal |
Passenger side door is closed When the automatic running board RH is being stowed |
11 to 14 V |
A42-3 (STW1) - A41-1 (GND) |
P - W-B |
Side auto step motor LH operation signal |
Driver side door is closed When the automatic running board LH is being stowed |
11 to 14 V |
A42-4 (DPL1) - A41-1 (GND) |
V - W-B |
Side auto step motor LH operation signal |
Driver side door is opened When the automatic running board LH is being deployed |
11 to 14 V |
A42-9 (FOUT) - A41-1 (GND) |
GR - W-B |
Ground |
Always |
Below 1 V |
A42-10 (FIN) - A41-1 (GND) |
W - W-B |
Ground |
Always |
Below 1 V |
A42-11 (SP1+) - A41-1 (GND) |
R - W-B |
Speed signal |
Vehicle speed at lower than 8 km/h (5 mph) |
11 to 14 V |
Vehicle speed at 8 km/h (5 mph) or more |
Below 1 V |
|||
A42-12 (IND) - A41-1 (GND) |
G - W-B |
Warning light drive output |
Warning light on |
11 to 14 V |
Warning light off |
Below 1 V |
|||
A42-13 (CTY2) - A41-1 (GND) |
R - W-B |
Door courtesy light switch RH signal |
Rear door RH open |
Below 1 V |
Rear door RH closed |
11 to 14 V |
|||
A42-14 (CTY1) - A41-1 (GND) |
L - W-B |
Door courtesy light switch LH signal |
Rear door LH open |
Below 1 V |
Rear door LH closed |
11 to 14 V |
(e) Using an oscilloscope, check the waveform 1.
Waveform 1 (Reference)
Item |
Content |
---|---|
Tool Setting |
5 V/DIV., 5 ms/DIV. |
Condition |
When the automatic running board is being deployed or stowed |
No Communication in Immobiliser System (B2796,B2798)
DESCRIPTION
DTC B2796 is stored when a key is inserted into the ignition key cylinder
but no communication occurs between the key and transponder key ECU assembly.
DTC B2798 is stored when a key is inserted into the ignition key cylinder
...
Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION
When the front doors are closed, each power window regulator motor can
control its power window operation for approximately 43 seconds after the
ignition switch is turned from ON to off by receiving operation permission
signals ...