TERMINALS OF ECU
1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*1 |
Main Body ECU (Multiplex Network Body ECU) |
- |
- |
(a) Disconnect the driver side junction block and main body ECU (multiplex network body ECU) connectors.
(b) Measure the voltage on the wire harness side connector according to the value(s) in the table below.
Terminal No. (Symbols) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
MB-31 (BECU) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Measure the resistance on the wire harness side connector according to the value(s) in the table below.
Terminal No. (Symbols) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
MB-11 (GND1) - Body ground |
- |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(d) Reconnect the driver side junction block and main body ECU (multiplex network body ECU) connectors.
(e) Measure the voltage and check for pulses according to the value(s) in the table below.
Terminal No. (Symbols) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
MB-30 (ACC) - Body ground |
- |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
Ignition switch off |
Below 1 V |
|||
MB-32 (IG) - Body ground |
- |
IG power supply |
Ignition switch ON |
11 to 14 V |
Ignition switch off |
Below 1 V |
|||
M6-1 (DIM) - Body ground |
Y - Body ground |
Dimmer relay output |
Dimmer switch in low position |
11 to 14 V |
Dimmer switch in high or high flash position |
Below 1 V |
|||
1F-28 - Body ground |
W - Body ground |
Headlight relay drive output |
Light control switch in head position |
Below 1 V |
Light control switch not in head position |
11 to 14 V |
|||
1F-30 - Body ground*1 |
R - Body ground |
Daytime running light system drive output |
Daytime running light system operating |
Below 1 V |
Daytime running light system not operating |
11 to 14 V |
|||
M6-24 (HU) - Body ground |
BE - Body ground |
Dimmer switch high position signal input |
Dimmer switch in high position |
Below 1 V |
Dimmer switch not in high position |
11 to 14 V or pulse generation |
|||
M6-10 (HF) - Body ground |
SB - Body ground |
Dimmer switch high flash position signal input |
Dimmer switch in high flash position |
Below 1 V |
Dimmer switch not in high flash position |
11 to 14 V or pulse generation |
|||
M6-17 (AHBI) - Body ground*5 |
R - Body ground |
Auto high beam main switch signal input |
Auto high beam main switch on |
Below 1 V |
Auto high beam main switch off |
11 to 14 V |
|||
M6-22 (TAIL) - Body ground |
G - Body ground |
Light control switch tail position signal input |
Light control switch in tail or head position |
Below 1 V |
Ignition switch off, light control switch not in tail or head position |
11 to 14 V or pulse generation |
|||
M6-12 (HEAD) - Body ground |
Y - Body ground |
Light control switch head position input |
Light control switch in head position |
Below 1 V |
Ignition switch off, light control switch not in head position |
11 to 14 V or pulse generation |
|||
M6-8 (A) - Body ground*2, *4 |
W - Body ground |
Light control switch AUTO position signal input |
Light control switch in AUTO position |
Below 1 V |
Ignition switch off, light control switch not in AUTO position |
11 to 14 V or pulse generation |
|||
M6-26 (FFOG) - Body ground*3 |
L - Body ground |
Fog light switch front position input |
Fog light switch in front position |
Below 1 V |
Ignition switch off, fog light switch off |
11 to 14 V or pulse generation |
|||
M6-19 (CLTB)*4 - M6-21 (CLTE)*4 |
P - R |
Automatic light control sensor power supply output |
Ignition switch off |
Below 1 V |
Ignition switch ON |
11 to 14 V |
|||
M6-20 (CLTS)*4 - Body ground |
GR - Body ground |
Automatic light control sensor signal input |
Ignition switch off |
Below 1 V |
Ignition switch ON |
Communication waveform generation (See waveform 1) |
|||
1F-27 - Body ground*3 |
BE - Body ground |
Front fog light drive output |
Light control switch in tail or head position, fog light switch in front position |
Below 1 V |
Light control switch in tail or head position, fog light switch off |
11 to 14 V |
|||
1H-36 - Body ground |
P - Body ground |
Rear door courtesy light switch LH input |
Rear door LH open |
Below 1 V |
Rear door LH closed |
Pulse generation |
|||
1D-30 - Body ground |
V - Body ground |
Rear door courtesy light switch RH input |
Rear door RH open |
Below 1 V |
Rear door RH closed |
Pulse generation |
|||
M6-6 (FLCY) - Body ground |
Y - Body ground |
Front door courtesy light switch LH input |
Front door LH open |
Below 1 V |
Front door LH closed |
pulse generation |
|||
M6-27 (FRCY) - Body ground |
LG - Body ground |
Front door courtesy light switch RH input |
Front door RH open |
Below 1 V |
Front door RH closed |
pulse generation |
|||
1H-27 - Body ground |
L - Body ground |
Rear door unlock detection switch LH input |
Rear door LH locked |
Pulse generation |
Rear door LH or rear door RH unlocked |
Below 1 V |
|||
1A-41 - Body ground |
Y - Body ground |
Rear door unlock detection switch RH input |
Rear door RH locked |
Pulse generation |
Rear door LH or rear door RH unlocked |
Below 1 V |
|||
1D-11 - Body ground |
P - Body ground |
Front door unlock detection switch LH input |
Front door LH locked |
Pulse generation |
Front door LH unlocked |
Below 1 V |
|||
1D-24 - Body ground |
GR - Body ground |
Front door unlock detection switch RH input |
Front door RH locked |
Pulse generation |
Front door RH unlocked |
Below 1 V |
(1) If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block may be malfunctioning.
Item |
Content |
---|---|
Tool setting |
2 V/DIV., 10 ms./DIV. |
Vehicle condition |
Ignition switch ON, automatic light control system operating |
HINT:
The communication waveform changes according to the surrounding brightness.
Under Hood
General Maintenance
GENERAL MAINTENANCE
PROCEDURE
1. GENERAL NOTES
Maintenance items may vary from country to country. Check the owner's
manual supplement in which the maintenance schedule is shown.
Every service item in the periodic maintenance schedule must be performed.
...
Customize Parameters
CUSTOMIZE PARAMETERS
PROCEDURE
1. CUSTOMIZE POWER WINDOW CONTROL SYSTEM
HINT:
The following items can be customized.
NOTICE:
When the customer requests a change in a function, first make sure that
the function can be customized.
Record the current settings before customizing.
...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction
in the ECU itself or in system circuits.
The DTCs can be read through the DLC3 of the vehicle. When the system seems to
be malfunctioning, use the Techstream to check for malfunctions ...