Lexus IS250 · Service Manual BODY ELECTRICAL

TERMINALS OF ECU

System information


MULTI-DISPLAY
*1: without Parking Assist Monitor System
*2: with Parking Assist Monitor System
E124053E02
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
+B1 (J50-1) - GND1 (J50-10)
 Y - W-B
 Battery
 Always
 10 to 14 V
ACC (J50-2) - GND1 (J50-10)
 O - W-B
 Accessory (ON)
 Turn engine switch off
 Below 1 V
ACC (J50-2) - GND1 (J50-10)
 O - W-B
 Accessory (ON)
 Turn engine switch on (ACC or IG)
 10 to 14 V
IG (J50-3) - GND1 (J50-10)
 B - W-B
 Ignition (ON)
 Turn engine switch off
 Below 1 V
IG (J50-3) - GND1 (J50-10)
 B - W-B
 Ignition (ON)
 Turn engine switch on (IG)
 10 to 14 V
TC (J50-7) - GND1 (J50-10)
 V - W-B
 Diagnosis ON signal
 Turn engine switch on (IG)
 9 to 14 V
GND1 (J50-10) - Body ground
 W-B - Body ground
 Ground
 Always
 Below 1 V
ILL- (J50-11) - GND1 (J50-10)
 W - W-B
 Illumination signal
 Turn light control switch OFF
 Below 1 V
ILL- (J50-11) - GND1 (J50-10)
 W - W-B
 Illumination signal
 Turn light control switch ON
 10 to 14 V
ILL+ (J50-12) - GND1 (J50-10)
 G - W-B
 Illumination signal
 Turn light control switch OFF
 Below 1 V
ILL+ (J50-12) - GND1 (J50-10)
 G - W-B
 Illumination signal
 Turn light control switch ON
 10 to 14 V
REV (J50-13) - GND1 (J50-10)
 L - W-B
 Reverse signal
 See "Vehicle Signal Check" Mode (Click here)
 -
SPD (J50-14) - GND1 (J50-10)
 P - W-B
 Speed signal from combination meter
 See "Vehicle Signal Check" Mode (Click here )
 -
CMP- (J50-15) - CMP+ (J50-16)
 W - B
 RDS-TMC signal
 RDS-TMC function is ON
 Pulse generation
(100 mVrms +- 5dB)
SLD (J50-17) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
PKB (J50-23) - GND1 (J50-10)
 R - W-B
 Parking brake signal
 See "Vehicle Signal Check" Mode (Click here)
 -
TX2- (J51-3) - GND1 (J50-10)
 LG - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX2+ (J51-4) - GND1 (J50-10)
 P - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TSW- (J51-5) - GND1 (J50-10)
 W-B - W-B
 Telephone relation switch signal
 Always
 Below 1 V
MACC (J51-9) - GND1 (J50-10)
 V - W-B
 Microphone AMP power supply
 Turn engine switch off
 Below 1 V
MACC (J51-9) - GND1 (J50-10)
 V - W-B
 Microphone AMP power supply
 Turn engine switch on (IG)
 5 V
MIN- (J51-10) - GND1 (J50-10)
 BR - W-B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
MIN+ (J51-11) - GND1 (J50-10)
 Y - W-B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
SGND (J51-12) - GND1 (J50-10)
 W-B - W-B
 Signal ground
 Always
 Below 1 V
TX1- (J51-15) - GND1 (J50-10)
 R - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX1+ (J51-16) - GND1 (J50-10)
 BR - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX3- (J51-17) - GND1 (J50-10)
 O - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX3+ (J51-18) - GND1 (J51-10)
 SB - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
IVO- (J51-21) - GND1 (J50-10)
 BR - W-B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
IVO+ (J51-22) - GND1 (J51-10)
 Y - W-B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
SLD (J51-23) - GND1 (J50-10)
 Shielded - W-B
 Shielded ground
 Always
 Below 1 V
NTSC (J52-1) - GND1 (J50-10)
 R - W-B
 DVD image signal
 DVD is played on radio receiver
 Pulse generation (Refer to waveform 2)
SGD1 (J52-4) - GND1 (J50-10)
 G - W-B
 Signal ground
 Always
 Below 1 V
SGND (J52-5) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
TX4- (p1-1) - GND2 (p1-6)
 W-B - B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX4+ (p1-2) - GND2 (p1-6)
 W-R - B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
SGND (p1-3) - GND2 (p1-61)
 Shielded - B
 Shielded ground
 Always
 Below 1 V
MCO- (p1-4) - GND2 (p1-6)
 L - B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
MCO+ (p1-5) - GND2 (p1-6)
 R - B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
GND2 (p1-6) - Body ground
 B - Body ground
 Ground
 Always
 Below 1 V
ACC2 (p1-7) - GND2 (p1-6)
 O - B
 Accessory (ON)
 Turn engine switch off
 Below 1 V
ACC2 (p1-7) - GND2 (p1-6)
 O - B
 Accessory (ON)
 Turn engine switch on (ACC)
 10 to 14 V
+B (p1-8) - GND2 (p1-6)
 R - B
 Battery
 Always
 10 to 14 V
SI- (p1-10) - GND2 (p1-6)
 L - B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
SI+ (p1-11) - GND2 (p1-6)
 R - B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
CMO- (p1-12) - CMO+ (p1-13)
 L - R
 RDS-TMC signal
 See "RDS-TMC Information" Mode (Click here)
 -
REV2 (p1-15) - GND2 (p1-6)
 GR - B
 Reverse signal
 See "Vehicle Sensors" Mode (Click here)
 -
SPD2 (p1-16) - GND2 (p1-6)
 W - B
 Speed signal
 See "Vehicle Sensors" Mode (Click here)
 -
GVI+ (q1-1) - GND2 (p1-6) (*1)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVI- (q1-2) - GND2 (p1-6) (*1)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVG1 (q1-3) - Body ground (*1)
 -
 Ground
 Always
 Below 1 V
GVI+ (w1-1) - GND2 (p1-6) (*2)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVI- (w1-2) - GND2 (p1-6) (*2)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVG1 (w1-3) - Body ground (*2)
 -
 Ground
 Always
 Below 1 V

  1. E120080E01
    Reference: waveform 1

    HINT:
    1. Terminal: NTSC - Body ground
    2. Gauge set: 200 mV/DIV., 10 μs/DIV.
    3. Condition: DVD is played on multi-display


NAVIGATION ECU
E124054E01
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
+B (p2-1) - GND1 (p2-15)
 R - B
 Battery
 Always
 10 to 14 V
SPD (p2-4) - GND1 (p2-15)
 W - B
 Speed signal
 See "Vehicle Sensors" Mode (Click here)
 -
SLD1 (p2-7) - GND1 (p2-15)
 Shielded - B
 Shielded ground
 Always
 Below 1 V
VOI- (p2-8) - GND1 (p2-15)
 L - B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
VOI+ (p2-9) - GND1 (p2-15)
 R - B
 Voice guidance signal
 Voice guidance is provided
 A waveform synchronized with sounds is output
CMP- (p2-10) - CMP+ (p2-11)
 L - R
 RDS-TMC signal
 See "RDS-TMC Information" Mode (Click here)
 -
RSG (p2-12) - GND1 (p2-15)
 Shielded - B
 Shielded ground
 Always
 Below 1 V
ACC (p2-13) - GND1 (p2-15)
 O - B
 Accessory (ON)
 Turn engine switch off
 Below 1 V
ACC (p2-13) - GND1 (p2-15)
 O - B
 Accessory (ON)
 Turn engine switch on (ACC)
 10 to 14 V
GND1 (p2-15) - Body ground
 B - Body ground
 Ground
 Always
 Below 1 V
TX- (p2-18) - GND1 (p2-15)
 W-B - B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
TX+ (p2-19) - GND1 (p2-15)
 W-R - B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
REV (p2-20) - GND1 (p2-15)
 GR - B
 Reverse signal
 See "Vehicle Sensors" Mode (Click here)
 -
MIC+ (p3-3) - GND1 (p2-15)
 R - B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
MIC- (p3-5) - GND1 (p2-15)
 L - B
 Microphone voice signal
 See "Microphone & Voice Recognition Check" (Click here)
 -
GVI+ (q1-1) - GND2 (p1-6)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVI- (q1-2) - GND2 (p1-6)
 -
 Digital image signal
 Navigation display is on
 Pulse generation
GVG1 (q1-3) - Body ground
 -
 Ground
 Always
 Below 1 V

GATEWAY ECU
E072244E05
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
IG (J76-1) - GND (J76-24)
 B - W-B
 Ignition (ON)
 Turn engine switch off
 Below 1 V
IG (J76-1) - GND (J76-24)
 B - W-B
 Ignition (ON)
 Turn engine switch on (IG)
 10 to 14 V
ACC (J76-2) - GND (J76-24)
 O - W-B
 Accessory (ON)
 Turn engine switch off
 Below 1 V
ACC (J76-2) - GND (J76-24)
 O - W-B
 Accessory (ON)
 Turn engine switch on (ACC)
 10 to 14 V
GTX- (J76-21) - GND (J76-24)
 O - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
GTX+ (J76-6) - GND (J76-24)
 SB - W-B
 AVC-LAN communication signal
 Turn engine switch on (ACC)
 2 to 3 V
BATT (J76-10) - GND (J76-24)
 LG - W-B
 Battery
 Always
 10 to 14 V
GND (J76-24) - Body ground
 W-B - Body ground
 Ground
 Always
 Below 1 V

RADIO RECEIVER (Click here)

STEREO COMPONENT AMPLIFIER (Click here)

TELEVISION CAMERA ECU (Click here)
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