RX400h · Service Manual BODY ELECTRICAL

TERMINALS OF ECU

System information


MULTI-DISPLAY:
I045173E02
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
GND (M4-3 ) - Body ground
 W-B - Body ground
 Ground
Always
 Below 1 V
MCI+ (M4-4) - GND (M4-3)
 G - W-B
 Microphone voice signal
 See "microphone check" (Click here)
 -
MCI- (M4-5) - Body ground
 R - Body ground
 Microphone voice signal
 See "microphone check" (Click here)
 -
MACC (M4-6) - GND (M4-3)
 Y - W-B
 Microphone AMP power supply
Turn ignition switch OFF → ON
 Below 1 V → 5 V
TX+ (M4-13) - GND (M4-3)
 P - W-B
 AVC-LAN communication signal
Turn ignition switch to ACC
 2 to 3 V
TX- (M4-14) - GND (M4-3)
 L - W-B
AVC-LAN communication signal
 Turn ignition switch to ACC
2 to 3 V
SGND (M4-17) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
MCO+ (M4-18) - GND (M4-3)
 BR - W-B
 Microphone voice signal
 See "microphone check" (Click here)
 -
MCO- (M4-19) - GND (M4-3)
 Y - W-B
 Microphone voice signal
 See "microphone check" (Click here)
 -
SLD (M4-20) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
VOI+ (M4-21) - GND (M4-3)
 R - W-B
 Telephone voice signal (bluetooth)
 See "microphone check" (Click here)
 -
IVO- (M4-22) - GND (M4-3)
 G - W-B
 Telephone voice signal (bluetooth)
 See "microphone check" (Click here)
 -
VR (M4-23) - GND (M4-3)
 Y - W-B
 Video return signal
 Turn ignition switch OFF
 Below 1 V
R (M4-24) - GND (M4-3)
 L - W-B
 Display signal (red)
 Navigation display is on
 -
G (M4-25) - GND (M4-3)
 W - W-B
 Display signal (green)
 Navigation display is on
 -
B (M4-26) - GND (M4-3)
 R - W-B
 Display signal (blue)
 Navigation display is on
 -
SYNC (M4-27) - GND (M4-3)
 BR - W-B
 Display signal (synchronize)
 Navigation display is on
 -
VG (M4-28) - GND (M4-3)
 B-W - W-B
 Shielded ground
 Always
 Below 1 V
ILL+ (M1-1) - GND (M4-3)
 G - W-B
 Illumination signal
 Turn ignition switch OFF → ON
 Below 1 V → 10 to 14 V
ILL- (M1-2) - Body ground
 W - Body ground
 Illumination signal
 Turn ignition switch OFF → ON
 Below 1 V → 10 to 14 V
GND (M1-3) - Body ground
 W-B - Body ground
 Ground
 Always
 Below 1 V
TX1+ (M1-4) - GND (M4-3)
 Y - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
TX1- (M1-5) - GND (M4-3)
 BR - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
TC (M1-7) - GND (M4-3)
 P - W-B
 Diagnosis ON signal
 Turn ignition switch to ON
 9 to 14 V
F (M1-8) - GND (M4-3)
 V - W-B
 Hazard signal
 Turn hazard switch OFF → ON
Below 1 V → 10 to 14 V or below 1 V
IG (M1-10) - GND (M4-3)
 LG - W-B
 Ignition (ON)
 Turn ignition switch OFF → ON
 Below 1 V → 10 to 14 V
ACC (M1-11) - GND (M4-3)
 GR - W-B
 Accessory (ON)
 Turn ignition switch OFF → ACC or ON
 Below 1 V → 10 to 14 V
+B1 (M1-12) - GND (M4-3)
 G - W-B
 Battery
 Always
 10 to 14 V
PKB (M1-16) - GND (M4-3)
 W - W-B
 Parking brake signal
 Turn parking brake switch ON → OFF
 Below 1 V → 10 to 14 V
ADIM (M1-17) - GND (M4-3)
 SB - W-B
 Illumination (auto dimmer) signal
 Ignition switch ON, light control switch TAIL or ON and automatic light control sensor covered by hand
 Above 9 V
TX3+ (M1-18) - GND (M4-3)
 R - W-B
 AVC-LAN communication signal
 Turn ignition switch to ON
 2 to 3 V
TX3- (M1-19) - GND (M4-3)
 B - W-B
 AVC-LAN communication signal
 Turn ignition switch to ON
 2 to 3 V
PBEW (M1-21) - GND (M4-3)
 O - W-B
 Passenger (front) seat belt warning signal
 Turn ignition switch to ON, front passenger seat and front seat buckle switch ON (Belt unfastened) → OFF (Belt fastened)
10 to 14 V → Below 1 V
SPD (M1-25) - GND (M4-3)
 SB - W-B
 Speed signal from combination meter
 See "Vehicle Signal Check Mode" (Click here)
 -
HSY (M2-1) - GND (M1-3)
 P - W-B
 Theft deterrent indicator signal
Insert ignition key → Remove key from ignition key cylinder
 Below 1 V → Pulse generation
ILL- (M2-5) - Body ground
 W - Body ground
 Illumination signal
 Turn ignition switch OFF → ON
 Below 1 V → 10 to 14 V

NAVIGATION ECU:
*1: LHD
*2: RHD
I039087E02
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
VR (N3-1) - GND1 (N4-17)
 Y - W-B
 Video return signal
 Turn ignition switch OFF
 Below 1 V
R (N3-2) - GND1 (N4-17)
 G - W-B
 Display signal (red)
 Navigation display is on
 -
B (N3-3) - GND1 (N4-17)
 R - W-B
 Display signal (blue)
 Navigation display is on
 -
TX+ (N3-5) - GND1 (N4-17)
 R - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
VG (N3-6) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
G (N3-7) - GND1 (N4-17)
 W - W-B
 Display signal (green)
 Navigation display is on
 -
SYNC (N3-8) - GND1 (N4-17)
 B - W-B
 Display signal (synchronize)
 Navigation display is on
 -
TX- (N3-10) - GND1 (N4-17)
 Y - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
AUI+ (N4-1) - GND1 (N4-17)
 Y - W-B
 Sound signal (input)
 Audio system is playing
 -
AUO+ (N4-2) - GND1 (N4-17) (*1)
 BR - W-B
 Sound signal (output)
 Audio system is playing
 -
AUO+ (N4-2) - GND1 (N4-17) (*2)
 B - W-B
 Sound signal (output)
 Audio system is playing
 -
SPD (N4-5) - GND1 (N4-17)
 SB - W-B
 Speed signal from combination meter
 See "Vehicle Sensors" mode (Click here)
 -
CMP- (N4-6) - GND1 (N4-17)
 Y - W-B
 RDS-TMC signal (input)
 See "RDS-TMC Information" (Click here)
 -
CMP+ (N4-7) - GND1 (N4-17)
 BR - W-B
 RDS-TMC signal (input)
 See "RDS-TMC Information" (Click here)
 -
+B (N4-9) - GND1 (N4-17)
 L - W-B
 Battery
 Always
 10 to 14 V
AUI- (N4-10) - GND1 (N4-17)
 LG - W-B
 Sound signal (input)
 Audio system is playing
 -
AUO- (N4-11) - GND1 (N4-17) (*1)
 R-Y - W-B
 Sound signal (output)
 Audio system is playing
 -
AUO- (N4-11) - GND1 (N4-17) (*2)
 Y - W-B
 Sound signal (output)
 Audio system is playing
 -
VOI+ (N4-12) - GND1 (N4-17)
 R - W-B
 Telephone voice signal (bluetooth)
 See "microphone check" (Click here)
 -
VOI- (N4-13) - GND1 (N4-17)
 G - W-B
 Telephone voice signal (bluetooth)
 See "microphone check" (Click here)
 -
REV (N4-14) - GND1 (N4-17)
 R - W-B
 Reverse signal from combination meter
 See "Vehicle Sensors" mode (Click here)
 -
MUT2 (N4-15) - GND1 (N4-17)
 V - W-B
 Mute signal
 Audio system is playing → Changing
 Above 3.5 V → Below 1 V
RSG (N4-16) - Body ground
 Shielded - Body ground
 Shielded ground
 Always
 Below 1 V
GND1 (N4-17) - Body ground
 W-B - Body ground
 Ground
 Always
 Below 1 V
ACC (N4-18) - GND1 (N4-17)
 P - W-B
 Accessory (ON)
 Turn ignition switch OFF → ACC or ON
 Below 1 V → 10 to 14 V
MIC+ (N7-3) - GND1 (N4-17)
 BR - W-B
Microphone voice signal
 See "microphone check" (Click here)
 -
MIC- (N7-5) - GND1 (N4-17)
 Y - W-B
 Microphone voice signal
 See "microphone check" (Click here)
 -
SNSE (N7-7) - Body ground
 W-B - Body ground
 Microphone connection detection signal
 Always
 Below 1 V

NETWORK GATEWAY ECU:
E072244E03
Symbols (Terminal No.)
 Wiring Color
 Terminal Description
 Condition
 Specification
IG (G1-1) - GND (G1-24)
 Y - W-B
Ignition (ON)
 Turn ignition switch OFF → ON
 Below 1 V → 10 to 14 V
GTX+ (G1-6) - GND (G1-24)
 R - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
BATT (G1-10) - GND (G1-24)
 SB - W-B
 Battery
 Always
 10 to 14 V
ACC (G1-2) - GND (G1-24)
 L - W-B
 Accessory (ON)
 Turn ignition switch OFF → ACC or ON
 Below 1 V → 10 to 14 V
GTX- (G1-21) - GND (G1-24)
 B - W-B
 AVC-LAN communication signal
 Turn ignition switch to ACC
 2 to 3 V
GND (G1-24) - Body ground
 W-B - Body ground
 Ground
 Always
 Below 1 V

HINT:
When trouble occurs in the network gateway ECU, the following symptoms are also confirmed simultaneously.
  1. "Outside temperature" is not indicated on the multi-display.
  2. "Vehicle information" is not indicated on the multi-display.
  3. Unable to operate the air conditioner system.


RADIO RECEIVER (Click here)

STEREO COMPONENT AMPLIFIER (Click here)

TELEVISION CAMERA ECU (Click here)
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