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:

Steering Angle Sensor Internal Circuit (C1433)
DESCRIPTION Steering angle sensor (spiral cable with sensor sub-assembly) signals are sent to the skid control ECU (master cylinder solenoid) via the CAN communication system. When there is a malfunction in the CAN communication system, it is detected by the steering angle sensor (spiral cabl ...

TC and CG Terminal Circuit
DESCRIPTION Connecting terminals TC and CG of the DLC3 causes the ECU to display the DTC by blinking the ABS warning light and slip indicator light. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (brake actuator assembly), perform zero point calibration ...

Yaw Rate Sensor Circuit (C1AA4,C1AA5)
DESCRIPTION The forward recognition camera receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the yaw rate and acceleration sensor (airbag sensor assembly) detects an abnormal yaw rate sensor signal or yaw rate sensor power supply voltage ...

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