Terminals Of Ecu

CHECK MULTI-DISPLAY ASSY

Fig 1: Checking Multi-Display Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the M5 and M6 multi-display connectors.

Measure the resistance and voltage of the wire harness side connectors.

Standard:

MULTI-DISPLAY CONNECTORS RESISTANCE AND VOLTAGE SPECIFICATIONS (1 OF 2)

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND1 (M5-11) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
ST1 (M5-12) - GND1 (M5-11)	W-L - W-B	Starter signal	Ignition switch OFF	0 V
ST1 (M5-12) - GND1 (M5-11)	W-L - W-B	Starter signal	Ignition switch START	10 to 14 V
+B1 (M5-10) - GND1 (M5-11)	O - W-B	Battery power supply	Always	10 to 14 V
ACC (M5-20) - GND1 (M5-11)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (M5-20) - GND1 (M5-11)	GR - W-B	ACC power supply	Ignition switch ACC	10 to 14 V
IG (M5-19) - GND1 (M5-11)	R-L - W-B	Ignition (ON) power supply	Ignition switch OFF	0 V
IG (M5-19) - GND1 (M5-11)	R-L - W-B	Ignition (ON) power supply	Ignition switch ON	10 to 14 V
SGND (M6-4) - Body ground	W-B - Body ground	Shielded ground	Always	Below 1 ohms

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

Reconnect the M5 and M6 multi-display connectors.

Measure the resistance and voltage of the connectors.

Standard:

MULTI-DISPLAY CONNECTORS RESISTANCE AND VOLTAGE SPECIFICATIONS (2 OF 2)

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
SPD (M5-18) - GND1 (M5-11)	W-R - W-B	Vehicle speed signal	Turn the wheel	Alternating between 9 to 14 V and below 2 V
PKB (M5-17) - GND1 (M5-11)	R-B - W-B	Parking brake signal	Parking brake switch OFF	10 to 14 V
PKB (M5-17) - GND1 (M5-11)	R-B - W-B	Parking brake signal	Parking brake switch ON	Below 1 V
TC (M5-8) - GND1 (M5-11)	P-B - W-B	Diagnosis ON signal	Ignition switch ON	10 to 14 V
OPN (M5-3) - GND1 (M5-11)	P - W-B	Multi-display door open/close operate signal	Ignition switch ACC, multi-display OPEN switch pressed	Below 1 V
OPN (M5-3) - GND1 (M5-11)	P - W-B	Multi-display door open/close operate signal	Ignition switch ACC, multi-display CLOSE switch pressed	10 to 14 V
TILT (M5-13) - GND1 (M5-11)	O - W-B	Multi-display door tilt operate signal	Ignition switch ACC, multi-display TILT switch not pressed	10 to 14 V
TILT (M5-13) - GND1 (M5-11)	O - W-B	Multi-display door tilt operate signal	Ignition switch ACC, multi-display TILT switch pressed	Below 1 V
RE1 (M5-4) - GND1 (M5-11)	LG - W-B	Multi-display door condition signal	Ignition switch ACC, multi-display door open	Below 1 V
RE2 (M5-14) - GND1 (M5-11)	LG-B - W-B	Multi-display door condition signal	Ignition switch ACC, multi-display door close	Below 1 V
GND1 (M5-11) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
TX+ (M5-6) - GND1 (M5-11)	L-R - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
TX- (M5-19) - GND1 (M5-11)	R-W - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
B (M6-22) - GND1 (M5-11)	BR - W-B	Display signal (blue)	Navigation display ON	Pulse generation
G (M6-21) - GND1 (M5-11)	W - W-B	Display signal (green)	Navigation display ON	Pulse generation
R (M6-20) - GND1 (M5-11)	R - W-B	Display signal (red)	Navigation display ON	Pulse generation
SYNC (M6-23) - GND1 (M5-11)	L - W-B	Display signal (synchronize)	Navigation display ON	Pulse generation
VR (M6-19) - GND1 (M5-11)	Y - W-B	Video return signal	Always	Below 1 ohms
VG (M6-24) - GND1 (M5-11)	Shielded - W-B	Shielded ground	Always	Below 1 ohms
MCO+ (M6-17) - GND1 (M5-11)	R - W-B	Microphone voice signal	Sounds received by microphone	Pulse generation
MCO- (M6-18) - GND1 (M5-11)	L - W-B	Microphone voice signal	Always	Below 1 ohms
SGND (M6-16) - GND1 (M5-11)	Shielded - W-B	Shielded ground	Always	Below 1 ohms
IVO+ (M6-9) - GND1 (M5-11)	W - W-B	Telephone voice signal (bluetooth)	Sounds received by microphone	Pulse generation
IVO- (M6-10) - GND1 (M-11)	B - W-B	Telephone voice signal (bluetooth)	Always	Below 1 ohms
SLD (M6-8) - GND1 (M5-11)	Shielded - W-B	Shielded ground	Always	Below 1 ohms
MACC (M6-7) - GND1 (M5-11)	R - W-B	Microphone ACC power	Ignition switch ACC	8 V
MIN (M6-5) - GND1 (M5-11)	LG - W-B	Microphone signal	Ignition switch ACC	5 V
MIN (M6-6) - GND1 (M5-11)	V - W-B	Microphone signal	Always	Below 1 ohms
TLSW (M6-2) - GND1 (M5-11)	L - W-B	Steering pad switch telephone signal	Steering pad switch TELEPHON switch is pushed	Below 1 V
TSW - (M6-3) - Body ground	BR - Body ground	Steering pad switch telephone signal	Always	Below 1 ohms

If the result is not as specified, the display may have a malfunction.

CHECK NAVIGATION ECU

Fig 2: Checking Navigation ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the N3 and N7 ECU connectors.

Measure the resistance and voltage of the wire harness side connectors.

Standard:

NAVIGATION ECU CONNECTORS RESISTANCE AND VOLTAGE SPECIFICATIONS (1 OF 2)

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
ACC (N3-18) - GND1 (N3-17)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (N3-18) - GND1 (N3-17)	GR - W-B	ACC power supply	Ignition switch ON	10 to 14 V
+B (N3-9) - GND1 (N3-17)	O - W-B	Battery power supply	Always	10 to 14 V
GND1 (N3-17) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
SNSE (N7-7) - Body ground	W-B - Body ground	Shielded ground	Always	Below 1 ohms

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

Reconnect the N3 and N7 ECU connectors.

Measure the resistance and voltage of the connectors.

Standard:

NAVIGATION ECU CONNECTORS RESISTANCE AND VOLTAGE SPECIFICATIONS (2 OF 2)

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
AUO+ (N3-2) - GND1 (N3-17)	L-O - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
AUO- (N3-11) - GND1 (N3-17)	Y-G - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
MUT2 (N3-15) - GND1 (N3-17)	W - W-B	Mute signal	Audio system playing, Voice guidance ON	Below 1 V
MUT2 (N3-15) - GND1 (N3-17)	W - W-B	Mute signal	Audio system playing, Voice guidance OFF	Approx. 3.5 V
SPD (N3-5) - GND1 (N3-17)	W-R - W-B	Vehicle speed signal	Turn the wheel	Alternating between 9 to 14 V and below 2 V
REV (N3-14) - GND1 (N3-17)	Y-R - W-B	Reverse signal	Shift lever position R	10 to 14 V
REV (N3-14) - GND1 (N3-17)	Y-R - W-B	Reverse signal	Shift lever position not R	Below 1 V
RSG (N3-16) - GND1 (N3-17)	Shielded - Body ground	Shielded ground	Always	Below 1 ohms
VOI+ (N3-12) - GND1 (N3-17)	W - W-B	Telephone voice signal (bluetooth)	Sounds received by microphone	Pulse generation
VOI- (N3-13) - GND1 (N3-17)	B - W-B	Telephone voice signal (bluetooth)	Sounds received by microphone	Pulse generation
B (N4-3) - GND1 (N3-17)	BR - W-B	Display signal (blue)	Navigation display ON	Pulse generation
G (N4-7) - GND1 (N3-17)	W - W-B	Display signal (green)	Navigation display ON	Pulse generation
R (N4-2) - GND1 (N3-17)	R - W-B	Display signal (red)	Navigation display ON	Pulse generation
SYNC (N4-8) - GND1 (N3-17)	L - W-B	Display signal (synchronize)	Navigation display ON	Pulse generation
VR (N4-1) - GND1 (N3-17)	Y - W-B	Video return signal	Always	Below 1 ohms
VG (N4-6) - GND1 (N3-17)	Shielded - W-B	Shielded ground	Always	Below 1 ohms
TX+ (N4-5) - GND1 (N3-17)	V - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
TX- (N4-10) - GND1 (N3-17)	P - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
MIC+ (N7-3) - GND1 (N3-17)	R - W-B	Microphone voice signal	Sounds received by microphone	Pulse generation
MIC- (N7-5) - GND1 (N3-17)	L - W-B	Microphone voice signal	Sounds received by microphone	Pulse generation

If the result is not specified, the ECU may have a malfunction.

CHECK RADIO RECEIVER ASSY

Fig 3: Checking Radio Receiver Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the R3 receiver connector.

Measure the resistance and voltage of the wire harness side connector.

Standard:

RADIO RECEIVER ASSY CONNECTOR TERMINALS RESISTANCE AND VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specification
GND (R3-20) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
ACC (R3-11) - GND (R3-20)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (R3-11) - GND (R3-20)	GR - W-B	ACC power supply	Ignition switch ACC	10 to 14 V
+B (R3-1) - GND (R3-20)	W-R - W-B	Battery power supply	Always	Below 1 V

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

Reconnect the R3 receiver connector.

Measure the voltage of connectors

Standard:

RADIO RECEIVER ASSY CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specification

ATX+ (R2-10) - GND (R3-20)⁽²⁾

L-R - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

ATX+ (R3-6) - GND (R3-20)⁽¹⁾

L-R - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

ATX- (R2-9) - GND (R3-20)⁽²⁾

R-W - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

ATX- (R3-16) - GND (R3-20)⁽¹⁾

R-W - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

TXS+ (R1-3) - GND (R3-20)

LG - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

TXS- (R1-6) - GND (R3-20)

P - W-B

ACV-LAN communication signal

Ignition switch ACC

2 to 3 V

⁽¹⁾

Taiwan

⁽²⁾	Except Taiwan

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

CHECK STEREO COMPONENT AMPLIFIER ASSY

Fig 4: Checking Stereo Component Amplifier Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the S22 and S23 amplifier connectors.

Measure the resistance and voltage of the harness side connectors.

Standard:

STEREO COMPONENT AMPLIFIER ASSY RESISTANCE AND VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (S22-13) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
B+ (S22-7) - GND (S22-13)	W-R - W-B	Battery power supply	Always	10 to 14 V
B+ (S22-16) - GND (S22-13)	W-R - W-B	Battery power supply	Always	10 to 14 V
ACC (S23-20) - GND (S22-13)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (S23-20) - GND (S22-13)	GR - W-B	ACC power supply	Ignition switch ACC	10 to 14 V

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

Reconnect the S22 and S23 amplifier connectors.

Measure the voltage of the connectors.

Standard:

STEREO COMPONENT AMPLIFIER ASSY VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
MTX+ (S23-5) - GND (S22-13)	V - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
MTX- (S23-18) - GND (S22-13)	P - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
N-MU (S23-9) - GND (S22-13)	W - W-B	Mute signal	Voice guidance ON	Below 1 V
TFL- (S23-15) - GND (S22-13)	L - W-B	Audio sound signal	Audio system is operating	Waveform synchronized with sound is output
TFL+ (S23-2) - GND (S22-13)	LG - W-B	Audio sound signal	Audio system is operating	Waveform synchronized with sound is output

If the result is not as specified, the amplifier may have a malfunction.

CHECK GATEWAY ECU

Fig 5: Checking Gateway ECU

Disconnect the G3 ECU connector.

Measure the resistance and voltage of the wire harness side connector.

Standard:

GATEWAY ECU CONNECTOR RESISTANCE AND VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (G3-22) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
BATT (G3-12) - GND (G3-22)	B - W-B	Battery power supply	Always	10 to 14 V
IG (G3-2) - GND (G3-22)	V-W - W-B	Ignition power supply	Ignition switch OFF	0 V
IG (G3-2) - GND (G3-22)	V-W - W-B	Ignition power supply	Ignition switch ON	10 to 14 V
ACC (G3-13) - GND (G3-22)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (G3-13) - GND (G3-22)	GR - W-B	ACC power supply	Ignition switch ACC	10 to 14 V

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

Reconnect the G3 ECU connector.

Measure the voltage of the connector.

Standard:

GATEWAY ECU CONNECTOR VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GTX+ (G3-9) - Body ground	LG - Body ground	AVC-LAN communication signal	Ignition switch ON	2 to 3 V
GTX- (G3-20) - Body ground	P - Body ground	AVC-LAN communication signal	Ignition switch ON	2 to 3 V

If the result is not as specified, the ECU may have a malfunction.

CHECK NAVIGATION AMPLIFIER

Fig 6: Checking Navigation Amplifier

Disconnect the N6 amplifier connector.

Measure the resistance of the voltage wire harness side connector.

Standard:

NAVIGATION AMPLIFIER CONNECTOR RESISTANCE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (N6-8) - Body ground	W-B - Body ground	Ground	Always	Below 1 ohms
ACC (N6-12) - GND (N6-8)	GR - W-B	ACC power supply	Ignition switch OFF	0 V
ACC (N6-12) - GND (N6-8)	GR - W-B	ACC power supply	Ignition switch ACC	10 to 14 V
+B (N6-5) - GND (N6-8)	W-R - W-B	Battery power supply	Always	10 to 14 V

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

Reconnect the N6 amplifier connector.

Measure the voltage of the connector.

Standard:

N6 AMPLIFIER CONNECTOR VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
SP+ (N6-1) - GND (N6-8)	BR - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
SP- (N6-6) - GND (N6-8)	G - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
AUI+ (N6-2) - GND (N6-8)	LG - W-B	Audio sound signal	Audio system is operating	Waveform synchronized with voice is output
AUI- (N6-7) - GND (N6-8)	L - W-B	Audio sound signal	Audio system is operating	Waveform synchronized with voice is output
NAV+ (N6-10) - GND (N6-8)	L-O - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
NAV- (N6-9) - GND (N6-8)	Y-G - W-B	Navigation voice signal	Voice guidance ON	Waveform synchronized with voice is output
NAVI (N6-4) - GND (N6-8)	W - W-B	Mute signal	Audio system playing, Voice guidance ON	Below 1 V
NAVI (N6-4) - GND (N6-8)	W - W-B	Mute signal	Audio system playing, Voice guidance OFF	Approx. 3.5 V
NAVO (N6-11) - GND (N6-8)	W - W-B	Mute signal	Audio system playing, Voice guidance ON	Below 1 V
NAVO (N6-11) - GND (N6-8)	W - W-B	Mute signal	Audio system playing, Voice guidance OFF	Approx. 3.5 V

If the result is not as specified, the amplifier may have a malfunction.