Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION BLOCK
(a) Remove the main body ECU (multiplex network body ECU) from the driver side
junction block (See page .gif)
).
(b) Disconnect the 1D driver side junction block connector.
(c) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
MB-11 (GND1) - Body ground |
None - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-31 (BECU) - Body ground |
None - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
MB-30 (ACC) - Body ground |
None - Body ground |
ACC power supply |
Ignition switch ON(ACC) |
11 to 14 V |
|
MB-32 (IG) - Body ground |
None - Body ground |
Ignition switch power supply |
Ignition switch ON(IG) |
11 to 14 V |
|
1D-31 (KSW) - Body ground |
G - Body ground |
Unlock warning switch input |
No Key in ignition key cylinder (off) |
10 kΩ or higher |
|
Key inserted ignition key cylinder (on) |
Below 1 Ω |
(d) Install the main body ECU (multiplex network body ECU) to the driver side
junction block (See page ).
(e) Reconnect the 1D driver side junction block connector.
(f) Measure the voltage and check for pulse according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
M6-6 (FLCY) - Body ground |
Y - Body ground |
Front door LH courtesy light switch input |
Front door LH open |
Below 1 V |
|
Front door LH closed |
Pulse generation |
|||
|
1D-31 (KSW) - Body ground |
G - Body ground |
Unlock warning switch input |
No Key in ignition key cylinder (off) |
11 to 14 V |
|
Key inserted ignition key cylinder (on) |
Below 1 V |
Diagnosis System
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) Check the DLC3 (See page ).
2. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, replace t ...
Key Reminder Buzzer does not Sound
DESCRIPTION
The key reminder warning buzzer sounds when the driver side door is opened while
the ignition switch is in the LOCK or ACC positions. The key reminder warning buzzer
is activated when ...
Other materials:
Combination Meter ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Combination Meter ECU Communication Stop Mode
Either condition is met:
Communication stop for "Combination Meter" is indicated on the
"Communication Bus Ch ...
Steering Angle Sensor (C1A47)
DESCRIPTION
The millimeter wave radar sensor assembly receives steering angle information
from the steering angle sensor (spiral cable with sensor sub-assembly). If the millimeter
wave radar sensor assembly detects a steering angle sensor (spiral cable with sensor
sub-assembly) malfunction, D ...
Certification ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Certification ECU Communication Stop Mode
Either condition is met:
Communication stop for "Certification (Smart)" is indicated
on the "Communication Bus Ch ...
