Toyota Tacoma manuals

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

(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block (See page (b) Disconnect the 1D driver side junction block connector. ).

(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. ).

(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:

Motor Power Supply Voltage Circuit (C142B-C146D)
DESCRIPTION The motor relay and motor fail-safe relay are built into the brake actuator assembly. During ABS, TRAC, VSC, or brake assist operation, the skid control ECU (brake actuator assembly) turns on the motor relay to run the pump motor in the brake actuator assembly. When a motor system ...

Stop Light Relay Circuit (C1A4B)
DESCRIPTION The skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 sends a stop light operation request signal to the stop light relay (stop light switch assembly). If the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actua ...

Steering Pad Switch Circuit
DESCRIPTION This circuit sends an operation signal from the steering pad switch assembly to the navigation receiver assembly. If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly. If there is a short in the circuit, the same condition ...

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