FixVault
Home › Toyota › 2003 › Land Cruiser › Repair and Diagnosis › External Pages › Different car › Section 518 (Navigation System - Diagnostics) › Terminals Of Ecu

Terminals Of Ecu

WARNING: This page is about a different car, the 2005 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

Multi-display: 

Fig 1: Identifying Connector Terminals ECU Multi-Display
G03071025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminals No.) Wiring Color Terminal Description Condition Specification
GND1 (M5-3) - Body ground W-B - Body ground Ground Always Below 1 V
TX1+ (M5-4) - GND1 (M5-3) P - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
TX1- (M5-5) - GND1 (M5-3) L-B - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
TC (M5-7) - GND1 (M5-3) P-B - W-B Diagnosis ON signal Turn ignition switch to the ON position 9 to 14V
IG (M5-10) - GND1 (M5-3) B-W - W-B Ignition (ON) Turn ignition switch OFF --> ON Below 1 V --> 10 to 14V
ACC (M5-11) - GND1 (M5-3) GR - W-B Accessory (ON) Turn ignition switch OFF --> ACC or ON Below 1 V --> 10 to 14V
B1 (M5-12) - GND1 (M5-3) L-W - W-B Battery Always 10 to 14V
PKB (M5-16) - GND1 (M5-3) R-W - W-B Parking brake signal Turn parking brake switch ON --> OFF Below 1 V --> 10 to 14V
SPD (M5-25) - GND1 (M5-3) V - W-B Speed signal from combination meter See "vehicle signal check mode" -
SGND (M6-3) - GND1 (M5-3) W-B - W-B Screen noise or other types of noise occur Ignition switch OFF Below 1 V
MIN+ (M6-4) - GND1 (M5-3) B - W-B Microphone voice signal See "microphone check" -
MIN- (M6-5) - Body ground W - Body ground Microphone voice signal See "microphone check" -
MACC (M6-6) - GND1 (M5-3) Y-G - W-B Microphone Accessory Turn ignition switch OFF --> ON Below 1 V --> 10 to 14V
TX3+ (M6-11) - GND1 (M5-3) P-L - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
TX3- (M6-12) - GND1 (M5-3) P-B - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
TX+ (M6-13) - GND1 (M5-3) P - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
TX- (M6-14) - GND1 (M5-3) L - W-B AVC-LAN communication signal Turn ignition switch to ON 2 to 3V
SGND (M6-17) - GND1 (M5-3) Shielded - W-B Screen noise or other types of noise occur Ignition switch OFF Below 1 V
MCO+ (M6-18) - GND1 (M5-3) B - W-B Microphone voice signal See "microphone check" -
MCO- (M6-19) - GND1 (M5-3) W - W-B Microphone voice signal See "microphone check" -
IVO+ (M6-21) - GND1 (M5-3) O - W-B Telephone voice signal (bluetooth) See "microphone check" -
IVO- (M6-22) - GND1 (M5-3) W - W-B Telephone voice signal (bluetooth) See "microphone check" -
VR (M6-23) - GND1 (M5-3) B - W-B Video return signal Turn ignition switch OFF Below 1 V
R (M6-24) - GND1 (M5-3) Y - W-B Display signal (red) Navigation display is on Pulse generation *2
G (M6-25) - GND1 (M5-3) W - W-B Display signal (green) Navigation display is on Pulse generation *2
B (M6-26) - GND1 (M5-3) R - W-B Display signal (blue) Navigation display is on Pulse generation *2
SYNC (M6-27) - GND1 (M5-3) G - W-B Display signal (synchronize) Navigation display is on Pulse generation *1
VG (M6-28) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
NTSC (M7-1) - GND1 (M5-3) W - W-B DVD screen is in disorder Ignition switch ON and DVD displayed Pulse generation *3
SGD1 (M7-4) - GND1 (M5-3) B - W-B Screen noise or other types of noise occur Ignition switch OFF Below 1 V
SGND (M7-5) - GND1 (M5-3) Shielded - W-B Screen noise or other types of noise occur Ignition switch OFF Below 1 V

Navigation ECU 

Fig 5: Identifying Connector Terminals Navigation ECU
G03071029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminals No.) Wiring Color Terminal Description Condition Specification
AUI+ (N2-1) - GND (N2-17) P - W-B Sound signal (input) Audio system is playing -
AUO+ (N2-2) - GND (N2-17) P - W-B Sound signal (output) Audio system is playing -
SLD1 (N2-3) - Body ground Shielded - Body ground Shielded ground Always Below 1.0 V
SPD (N2-5) - GND1 (N2-17) V - W-B Speed signal from combination meter See "Vehicle Signal Check Mode" (see PRE-CHECK  ) -
+B (N2-9) - GND (N2-17) L-Y - W-B Battery Always 10 to 14V
AUI- (N2-10) - GND (N2-17) V - W-B Sound signal (input) Audio system is playing -
AUO- (N2-11) -GND (N2-17) V - W-B Sound signal (output) Audio system is playing -
VOI+ (N2-12) - Body ground O - Body ground Telephone voice signal (bluetooth) See "microphone check" -
VOI- (N2-13) - Body ground W-Body ground Telephone voice signal (bluetooth) See "microphone check" -
REV (N2-14) - GND (N2-17) R-B - W-B Reverse signal from combination meter See "Vehicle Signal Check Mode" (see PRE-CHECK  ) -
GND (N2-17) - Body ground W-B - Body ground Ground Always Below 1 V
ACC (N2-18) - GND (N2-17) GR - W-B Accessory (ON) Turn ignition switch OFF --> ACC or ON Below 1 V --> 10 - 14V
VR (N3-1) - GND (N2-17) B - W-B Video return signal Turn ignition switch OFF Below 1 V
R (N3-2) - GND (N2-17) Y - W-B Display signal (red) Navigation display is on Pulse generation *2
B (N3-3) - GND (N2-17) R - W-B Display signal (blue) Navigation display is on Pulse generation *2
TX+ (N3-5) - GND (N2-17) P - W-B AVC-LAN communication signal Turn ignition switch to ACC 2 to 3V
VG (N3-6) - Body ground Shielded - Body ground Shielded ground Always Below 1 V
G (N3-7) - GND (N2-17) W - W-B Display signal (green) Navigation display is on Pulse generation *2
SYNC (N3-8) - GND (N2-17) G - W-B Display signal (synchronize) Navigation display is on Pulse generation *1
TX- (N3-10) - GND (N2-17) L-B - W-B AVC-LAN communication signal Turn ignition switch to ACC 2 to 3V
MIC+ (N4-3) - GND (N2-17) B - W-B Microphone voice signal See "microphone check" -
MIC- (N4-5) - GND (N2-17) W - W-B Microphone voice signal See "microphone check" -
SNSE (N4-7) - Body ground W-B - Body ground Ground Always Below 1 V

Radio receiver assembly 

Fig 8: Identifying Connector Terminals Radio Receiver Assembly
G03071032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminal No.) Condition Specified condition Problem symptoms when short circuit is detected.
+B < --> GND (R36-1 < --> R36-20) Constant 10 - 14 V Audio system does not operate.
AMP < --> GND (R36-3 < --> R36-20) - - -
MUTE < --> GND (R36-7 < --> R36-20) - - Pop sound etc.
MUTE < --> GND (R36-7 < --> R36-20) - - Audio system does not operate.
FR < --> GND (R36-8 < --> R36-20) Constant 10 - 14 V Sound from front right speaker is small
FL < --> GND (R36-9 < --> R36-20) Constant 10 - 14 V Sound from front left speaker is small
ACC < --> GND (R36-11 < --> R36-20) Ignition switch ACC 10-14V Audio system does not operate.
ANT+ < --> GND (R36-13 < --> R36-20) Radio switch ON 10 - 14 V Antenna does not extend.
RR < --> GND (R36-18 < --> R36-20) Constant 10-14V Sound from rear right side speaker is small.
RL < --> GND (R36-19 < --> R36-20) Constant 10-14V Sound from rear left side speaker is small.
GND < --> Body ground (R36-20 < --> Body ground) Constant Continuity Audio system is normal.
CDR+ (R37-2) - - Sound from right side speaker is small
CDR-(R37-3) - - Sound from right side speaker is small
CDL+ (R37-4) - - Sound from left side speaker is small
CDL- (R37-5) - - Sound from left side speaker is small
MUTE < --> GND (R37-6 < --> R36-20) - - Pop sound etc.
MUTE < --> GND (R37-6 < --> R36-20) - - Audio system does not operate.
TX+ < --> GND (R37-9 < --> R36-20) AVC-LAN communication circuit - Audio system does not operate.
TX-(R37-10) AVC-LAN communication circuit - Audio system does not operate.
TX+ (R38-9) AVC-LAN Communication circuit - Audio system does not operate.
TX-(R38-10) AVC-LAN Communication circuit - Audio system does not operate.

Stereo component amplifier 

Fig 9: Identifying Connector Terminals Stereo Component Amplifier
G03071033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminal No.) Condition Specified condition Problem symptom when open circuit is detected.
FR+ < --> E (S6-1 < --> S6-12) Radio switch ON 5 - 7V RH side speaker does not sound.
FL+ < --> E (S6-2 < --> S6-12) Radio switch ON 5 - 7V LH side speaker does not sound.
RR+ < --> E (S6-3 < --> S6-12) Radio switch ON 5 - 7V Rear RH side speaker does not sound.
RL+ < --> E (S6-4 < --> S6-12) Radio switch ON - 7V Rear LH side speaker does not sound.
WFR+ < --> E (S6-5 < --> S6-12) Radio switch ON 5 - 7V Rear RH side speaker does not sound.
WFL+ < --> E (S6-6 < --> S6-12) Radio switch ON 5 - 7V Rear LH side speaker does not sound.
+B < --> E (S6-7 < --> S6-12) Constant 10 - 14V All speaker does not sound
FR- < -->E (S6-8 < --> S6-12) Radio switch ON 5 - 7V RH side speaker does not sound.
FL- < -->E (S6-9 < --> S6-12) Radio switch ON 5 - 7V LH side speaker does not sound.
RR- < -->E (S6-10 < --> S6-12) Radio switch ON 5 - 7V Rear RH side speaker does not sound.
RL- < -->E (S6-11 < --> S6-12) Radio switch ON 5 - 7V Rear LH side speaker does not sound.
E < --> Body ground (S6-12 < --> Body ground) Constant Continuity -
GND2 < --> Body ground (S6-13 < --> Body ground) Constant Continuity -
WFR- < --> E (S6-14 < --> S6-12) Radio switch ON 5 - 7V Rear RH side speaker does not sound.
WFL- < --> E (S6-15 < --> S6-12) Radio switch ON 5 - 7V Rear LH side speaker does not sound.
+B2 < --> GND2 (S6-16 < --> S6-13) Constant 10 - 14 V All speaker does not sound
AMP (S7-1) - - -
ACC < --> GND2 (S7-2 < --> S6-13) Ignition switch ACC 10 - 14V Audio system does not operate.
BEEP (S7-4) - - LH side speaker does not sound.
F.L < --> GND2 (S7-5 < --> S6-13) Constant 10 - 14 V Sound from front LH speaker is small.
F.R < --> GND2 (S7-6 < --> S6-13) Constant 10 - 14V Sound from front RH speaker is small.
SGND < --> GND2 (S7-11 < --> S6-13) - 5 - 7V -
MUTE < --> GND2 (S7-12 < --> S6-13) Radio switch ON 5 - 7V Audio system does not operate.
R.L < --> GND2 (S7-13 < --> S6-13) Constant 10 - 14V Sound from rear LH speaker is small.
R.R < --> GND2 (S7-14 < --> S6-13) Constant 10 - 14 V Sound from rear RH speaker is small.

DVD auto changer: 

Fig 10: Identifying Connector Terminals DVD Auto Changer
G03071034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminal No.) Condition Specified condition Problem symptom when open circuit is detected.
ACC < --> GND (D26-1 < --> D26-20) Ignition switch ACC 10-14V DVD auto changer does not operate.
TXM+ < --> GND (D26-3 < --> D26-20) AVC-LAN communication circuit - Audio system does not operate.
CDR+ (D26-5) - - Sound from right side speaker is small.
CDL+ (D26-6) - - Sound from left side speaker is small.
NTSC (D26-9) - - -
+B < --> GND (D26-10 < --> D26-20) Constant 10-14V DVD auto changer does not operate.
MUTE < --> GND (D26-11 < --> D26-20) DISC switch ON 5-7V Audio system does not operate.
TXM- < --> GND (D26-13 < --> D26-20) AVC-LAN communication circuit - Audio system does not operate.
CDR- (D26-15) - - Sound from right side speaker is small.
CDL- (D26-16) - - Sound from left side speaker is small.

Gateway ECU: 

Fig 11: Identifying Connector Terminals Gateway ECU
G03071035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TERMINALS REFERENCE

Symbols (Terminals No.) Wiring Color Condition Specified condition
IG < --> GND (G4-2 < --> G4-14) B-W < --> W-B Ignition switch ON. 10 - 14 V
MPD1 (G4-4) B Communication circuit (Gateway ECU and Center ECU) -
GTX+ (G4-5) P-L AVC-LAN communication circuit -
CG < --> Body ground (G4-7 < --> Body ground) BR < --> Body ground Constant Continuity
BATT < --> GND (G4-8 < --> G4-14) L-W < --> W-B Constant 10 - 14V
MPD2 (G4-11) P-B Communication circuit (Gateway ECU and Center ECU) -
GTX-(G4-12) P-B AVC-LAN communication circuit -
GND < --> Body ground (G4-7 < --> Body ground) BR < --> Body ground Constant Continuity

Oscilloscope

*1: wave 1

Oscilloscope

*1: wave 1

About FixVault