Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Seat / Front Power Seat Control System(w/ Memory) / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK FRONT POWER SEAT SWITCH LH

(a) Disconnect the b18 and b19 connectors from the front power seat switch LH.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
b18-2 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
b18-7 (+B1) - b18-2 (GND1)	W - W-B	Power source	Always	11 to 14 V
b19-12 (SYSB) - b18-2 (GND1)	P - W-B	System power source	Always	11 to 14 V

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

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
b18-3 (SLD+) - b18-2 (GND1)	L - W-B	Sliding motor signal (forward)	Slide switch off	Below 1 V
b18-3 (SLD+) - b18-2 (GND1)	L - W-B	Sliding motor signal (forward)	Slide switch on (Forward)	11 to 14 V
b18-4 (SLD-) - b18-2 (GND1)	GR - W-B	Sliding motor signal (rearward)	Slide switch off	Below 1 V
b18-4 (SLD-) - b18-2 (GND1)	GR - W-B	Sliding motor signal (rearward)	Slide switch on (Rearward)	11 to 14 V
b18-5 (FRV-) - b18-2 (GND1)	R - W-B	Front vertical motor signal (downward)	Front vertical switch off	Below 1 V
b18-5 (FRV-) - b18-2 (GND1)	R - W-B	Front vertical motor signal (downward)	Front vertical switch on (Downward)	11 to 14 V
b18-6 (+B2) - b18-1 (GND2)	SB - W-B	Power source	Always	11 to 14 V
b18-8 (FRV+) - b18-2 (GND1)	B - W-B	Front vertical motor signal (upward)	Front vertical switch off	Below 1 V
b18-8 (FRV+) - b18-2 (GND1)	B - W-B	Front vertical motor signal (upward)	Front vertical switch on (Upward)	11 to 14 V
b18-9 (RCL+) - b18-2 (GND1)	P - W-B	Reclining motor signal (forward)	Reclining switch off	Below 1 V
b18-9 (RCL+) - b18-2 (GND1)	P - W-B	Reclining motor signal (forward)	Reclining switch on (Forward)	11 to 14 V
b18-11 (RCL-) - b18-2 (GND1)	LG - W-B	Reclining motor signal (rearward)	Reclining switch off	Below 1 V
b18-11 (RCL-) - b18-2 (GND1)	LG - W-B	Reclining motor signal (rearward)	Reclining switch on (Rearward)	11 to 14 V
b18-10 (LFT+) - b18-2 (GND1)	V - W-B	Lifter motor signal (upward)	Lifter switch off	Below 1 V
b18-10 (LFT+) - b18-2 (GND1)	V - W-B	Lifter motor signal (upward)	Lifter switch on (Upward)	11 to 14 V
b18-12 (LFT-) - b18-2 (GND1)	G - W-B	Lifter motor signal (downward)	Lifter switch off	Below 1 V
b18-12 (LFT-) - b18-2 (GND1)	G - W-B	Lifter motor signal (downward)	Lifter switch on (Downward)	11 to 14 V
b19-1 (SGND) - b18-2 (GND1)	BR - W-B	Ground	Always	Below 1 Ω
b19-3 (SSFV) - b19-1 (SGND)	R - BR	Front vertical position signal	Front vertical function operating	4.5 to 4.8 V
b19-4 (SSRL) - b19-1 (SGND)	P - BR	Lifter position signal	Lifter function operating	4.5 to 4.8 V
b19-5 (SSRS) - b19-1 (SGND)	G- BR	Slide position signal	Slide function operating	4.5 to 4.8 V
b19-11 (SSRR) - b19-1 (SGND)	V - BR	Reclining position signal	Reclining function operating	4.5 to 4.8 V

If the result is not as specified, the front power seat switch LH may have a malfunction.

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

(a) Remove the main body ECU (multiplex network body ECU) (See page ).

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A-30 (BECU) - Body ground	-	Power source	Always	11 to 14 V
A-32 (IG) - Body ground	-	Power source (IG)	Engine switch on (IG)	11 to 14 V
A-32 (IG) - Body ground	-	Power source (IG)	Engine switch off	Below 1 V
A-11 (GND1) - Body ground	-	Ground	Always	Below 1 Ω
F10-3 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

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

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 symptoms are lis ...

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 about Toyota 4Runner:

Removal
REMOVAL CAUTION / NOTICE / HINT HINT: When removing the symbol emblem, No. 1 back door emblem and No. 1 roof side mark, heat the vehicle body, symbol emblem, No. 1 back door emblem and No. 1 roof side mark using a heat light. Standard: Ite ...

System Description
SYSTEM DESCRIPTION 1. GENERAL (a) When the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle, the system informs the driver of the distance between the sensors and the obstacles by sounding a buzzer. 2. FUNCTION OF COMPONENT ...