Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

Toyota Tacoma (2015-2018) Service Manual / Door Lock / Wireless Door Lock Control System(w/o Smart Key System) / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK DRIVER SIDE JUNCTION BLOCK AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Disconnect the MB main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connectors disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
MB-11(GND1) - Body ground	-	Ground	Always	Below 1 Ω
MB-31 (BECU) - Body ground	-	Battery power supply	Always	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Ignition switch ACC	11 to 14 V
MB-30 (ACC) - Body ground	-	ACC power supply	Ignition switch off	Below 1 V
MB-32 (IG) - Body ground	-	IG power supply	Ignition switch ON	11 to 14 V
MB-32 (IG) - Body ground	-	IG power supply	Ignition switch off	Below 1 V

If the result is not as specified, there may be a malfunction in the wire harness.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
1D-1 (ACT+) - Body ground	R - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (power window regulator master switch assembly) or driver door key cylinder off	Below 1 V
1D-1 (ACT+) - Body ground	R - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked	11 to 14 V
1H-12 (ACT+) - Body ground	LA-R - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (power window regulator master switch assembly) or driver door key cylinder off	Below 1 V
1H-12 (ACT+) - Body ground	LA-R - Body ground	Door lock motor unlock drive output (except driver door)	Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked	11 to 14 V
1H-10 (ACT-) - Body ground	LA-G - Body ground	Door lock motor lock drive output (all doors)	Door control switch (power window regulator master switch assembly) or driver door key cylinder off	Below 1 V
1H-10 (ACT-) - Body ground	LA-G - Body ground	Door lock motor lock drive output (all doors)	Door control switch (power window regulator master switch assembly) or driver door key cylinder locked	11 to 14 V
1D-3 (ACT-) - Body ground	G - Body ground	Door lock motor lock drive output (all doors)	Door control switch (power window regulator master switch assembly) or driver door key cylinder off	Below 1 V
1D-3 (ACT-) - Body ground	G - Body ground	Door lock motor lock drive output (all doors)	Door control switch (power window regulator master switch assembly) or driver door key cylinder locked	11 to 14 V
1D-2 (ACTD) - Body ground	B - Body ground	Driver door lock motor unlock drive output	Door control switch (power window regulator master switch assembly) or driver door key cylinder off	Below 1 V
1D-2 (ACTD) - Body ground	B - Body ground	Driver door lock motor unlock drive output	Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked	11 to 14 V
M6-27 (FRCY) - Body ground	LG - Body ground	Front door courtesy light switch RH input	Front door RH open	Below 1 V
M6-27 (FRCY) - Body ground	LG - Body ground	Front door courtesy light switch RH input	Front door RH open	11 to 14 V
M6-6 (FLCY) - Body ground	Y - Body ground	Front door courtesy light switch LH input	Front door LH open	Below 1 V
M6-6 (FLCY) - Body ground	Y - Body ground	Front door courtesy light switch LH input	Front door LH closed	11 to 14 V
1H-36 (LCTY) - Body ground	P - Body ground	Rear door courtesy light switch LH input1 Upper access panel lock assembly LH input2 Lower access panel lock assembly LH input*2	Rear door LH open	Below 1 V
1H-36 (LCTY) - Body ground	P - Body ground	Rear door courtesy light switch LH input1 Upper access panel lock assembly LH input2 Lower access panel lock assembly LH input*2	Rear door LH closed	Pulse generation
1D-30 (RCTY) - Body ground	V - Body ground	Rear door courtesy light switch RH input1 Upper access panel lock assembly RH input2 Lower access panel lock assembly RH input*2	Rear door RH open	Below 1 V
1D-30 (RCTY) - Body ground	V - Body ground	Rear door courtesy light switch RH input1 Upper access panel lock assembly RH input2 Lower access panel lock assembly RH input*2	Rear door RH closed	Pulse generation
1D-11 (LSFL) - Body ground	P - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
1D-11 (LSFL) - Body ground	P - Body ground	Front door LH unlock detection switch input	Ignition switch off, all doors closed and front door LH locked	Pulse generation
1D-24 (LSFR) - Body ground	GR - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
1D-24 (LSFR) - Body ground	GR - Body ground	Front door RH unlock detection switch input	Ignition switch off, all doors closed and front door RH locked	Pulse generation
1A-41 (LSR) - Body ground	Y - Body ground	Rear door RH unlock detection switch input	Rear door RH or LH unlocked	Below 1 V
1A-41 (LSR) - Body ground	Y - Body ground	Rear door RH unlock detection switch input	Ignition switch off, all doors closed and rear door RH and LH locked	Pulse generation
1H-27 (LSR) - Body ground	L - Body ground	Rear door LH unlock detection switch input	Rear door LH or RH unlocked	Below 1 V
1H-27 (LSR) - Body ground	L - Body ground	Rear door LH unlock detection switch input	Ignition switch off, all doors closed and rear door LH and RH locked	Pulse generation
1F-29 (BZR) - Body ground	Y - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer off	Below 1 V
1F-29 (BZR) - Body ground	Y - Body ground	Wireless door lock buzzer signal	Wireless door lock buzzer on	Pulse generation
31-1D (KSW) - Body ground	G - Body ground	Key unlock warning switch input	Key in ignition key cylinder	Below 1 V
31-1D (KSW) - Body ground	G - Body ground	Key unlock warning switch input	No key in ignition key cylinder	11 to 14 V or Pulse generation

*1: for Double Cab
*2: for Access Cab

If the result is not as specified, there may be a malfunction in the wire harness.

2. CHECK DOOR CONTROL RECEIVER (w/ Tire Pressure Warning System)

(a) Disconnect the T25 door control receiver connector.

(b) Measure the resistance and voltage according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connectors disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
T25-7 (+B) - Body ground	BE - Body ground	Battery (power supply)	Always	11 to 14 V
T25-12 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

(d) Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
T25-5 (PRG) - T25-12 (GND)	GR - W-B	Signal input from main body ECU (multiplex network body ECU)	Key inserted in ignition key cylinder → Key pulled out of ignition key cylinder	11 to 14 V → Pulse generation → 11 to 14 V
T25-4 (RDA) - T25-12 (GND)	B - W-B	Signal output to main body ECU (multiplex network body ECU)	Ignition switch off, all doors closed and door control transmitter module set sub-assembly switch not pressed	11 to 14 V
T25-4 (RDA) - T25-12 (GND)	B - W-B	Signal output to main body ECU (multiplex network body ECU)	Ignition switch off, all doors closed and door control transmitter module set sub-assembly switch pressed	Pulse generation

If the result is not as specified, the door control receiver may have a malfunction.

3. CHECK DOOR CONTROL RECEIVER (w/o Tire Pressure Warning System)

(a) Disconnect the D7 door control receiver connector.

(b) Measure the resistance according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connectors disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D7-5 (+B) - Body ground	V - Body ground	Battery (power supply)	Always	11 to 14 V
D7-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

(d) Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D7-3 (PRG) - D7-1 (GND)	GR - W-B	Signal input from main body ECU (multiplex network body ECU)	Key inserted in ignition key cylinder → Key pulled out of ignition key cylinder	11 to 14 V → Pulse generation → 11 to 14 V
D7-2 (RDA) - D7-1 (GND)	B - W-B	Signal output to main body ECU (multiplex network body ECU)	Ignition switch off, all doors closed and door control transmitter module set sub-assembly switch not pressed	11 to 14 V
D7-2 (RDA) - D7-1 (GND)	B - W-B	Signal output to main body ECU (multiplex network body ECU)	Ignition switch off, all doors closed and door control transmitter module set sub-assembly switch pressed	Pulse generation

If the result is not as specified, the door control receiver may have a malfunction.

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, recharge ...

Data List / Active Test

DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

Other materials:

Installation of a mobile two-way radio system
The installation of a mobile two-way radio system in your vehicle could affect electronic systems such as: ● Multiport fuel injection system/sequential multiport fuel injection system ● Cruise control system ● Anti-lock brake system ● SRS airbag system ● Seat be ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptom are listed in order of probability in the "Suspected Area" column of the table. Check each sym ...

No Sound can be Heard from Speakers
PROCEDURE 1. CHECK AUDIO SETTINGS (a) In sound output setting mode, set volume, fader and balance to the initial values and check that the sound is normal. OK: Audio system returns to normal. HINT: Sound quality adjustment measures vary according to the type ...