Last Modified: 4-30-2014 6.6 U Doc ID: RM0000018NR001X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM: TERMINALS OF ECU; 2006 MY LX470 [05/2005 -        ]

TERMINALS OF ECU

1. CHECK FRONT AIR CONDITIONING AMPLIFIER

Symbols (Terminal No.)

Wiring Color

Condition

Specified Condition

AIF (A47-1) - GND (A49-12)

G-W - W-B

IG ON. Air inlet control switch "FRESH"

Battery voltage

IG ON. Air inlet control switch "RECIRC"

Below 1.0 V

AIR (A47-2) - GND (A49-12)

LG-B - W-B

IG ON. Air inlet control switch "RECIRC"

Battery voltage

IG ON. Air inlet control switch "FRESH"

Below 1.0 V

MRRHR (A47-6) - GND (A49-12)

R - W-B

IG ON. Mirror heater switch "OFF"

Battery voltage

IG ON. Mirror heater switch "ON"

Below 1.0 V

MGC (A47-7) - GND (A49-12)

L - W-B

Compressor does not operate

Battery voltage

Compressor operates

Below 1.0 V

FRHR (A47-9) - GND (A49-12)

Y-R - W-B

IG ON. Front A/C blower motor does not operate

Battery voltage

IG ON. Front A/C blower motor operates

Below 1.0 V

RDFGR (A47-10) - GND (A49-12)

LG - W-B

IG ON. Rear defogger switch "OFF"

Battery voltage

IG ON. Rear defogger switch "ON"

Below 1.0 V

AC1 (A47-11) - GND (A49-12)

W-G - W-B

Compressor does not operate

Battery voltage

Compressor operates

Below 1.0 V

DEF (A47-12) - GND (A49-12)

B-W - W-B

IG ON. Mode control switch "Except DEF"

Battery voltage

IG ON. Mode control switch "DEF"

Below 0.7 V

F/D (A47-13) - GND (A49-12)

P-L - W-B

IG ON. Mode control switch "Except FOOT/DEF"

Battery voltage

IG ON. Mode control switch "FOOT/DEF"

Below 0.7 V

FOOT (A47-14) - GND (A49-12)

W - W-B

IG ON. Mode control switch "Except FOOT/DEF"

Battery voltage

IG ON. Mode control switch "FOOT/DEF"

Below 0.7 V

B/L (A47-15) - GND (A49-12)

BR-W - W-B

IG ON. Mode control switch "Except BI-LEVEL"

Battery voltage

IG ON. Mode control switch "BI-LEVEL"

Below 0.7 V

FACE (A47-16) - GND (A49-12)

GR - W-B

IG ON. Mode control switch "Except FACE"

Battery voltage

IG ON. Mode control switch "FACE"

Below 0.7 V

FRAMH (A47-21) - GND (A49-12)

P-B - W-B

IG ON. Temperature control dial "MAX. WARM"

Battery voltage

IG ON. Temperature control dial "MAX. COOL"

Below 1.0 V

FRAMC (A47-22) - GND (A49-12)

P-G - W-B

IG ON. Temperature control dial "MAX. COOL"

Battery voltage

IG ON. Temperature control dial "MAX. WARM"

Below 1.0 V

FRBLW (A47-23) - GND (A49-12)

W-R - W-B

IG ON. Front A/C blower motor does not operate

Battery voltage

IG ON. Front A/C blower motor operates

Pulse generation

HZD (A47-24) * - GND (A49-12)

W - W-B

Hazard switch "ON"

Continuity

DEFC (A47-27) * - GND( A49-12)

R-L - W-B

Diff. lock switch "ON"

Continuity

ANTU (A47-28) * - GND (A49-12)

L-Y - W-B

Push in antenna up switch

Continuity

ANTD (A47-29) * - GND (A49-12)

L-W - W-B

Push in antenna down switch

Continuity

RRMGV (A47-40) - GND (A49-12)

LG-R - W-B

IG ON. Rear cooler switch "OFF"

Battery voltage

IG ON. Rear cooler switch "ON"

Below 1.0 V

FRTP (A48-5) - FRSG (A48-18)

B-Y - Y-G

IG ON. Temperature control dial "MAX. COOL"

Approx. 4.0 V

IG ON. Temperature control dial "MAX. WARM"

Approx. 1.0 V

TAM (A48-7) - FRSG (A48-18)

L-Y - Y-G

IG ON. Ambient temperature at 25°C (77°F)

1.35 to 1.75 V

TS (A48-8) - FRSG (A48-18)

B-Y - Y-G

IG ON. Sensor subject electric light

0.8 to 4.3 V

IG ON. Sensor covered by a cloth

Below 0.8 V

FRS5 (A48-9) - FRSG (A48-18)

G-R - Y-G

Turn ignition switch "ON"

5.0 V

Turn ignition switch "OFF"

No voltage

TPI (A48-14) - FRSG (A48-18)

L-R - Y-G

IG ON. Air inlet control switch "FRESH"

Approx. 1.0 V

IG ON. Air inlet control switch "RECIRC"

Approx. 4.0 V

FRTE (A48-16) - FRSG (A48-18)

GR-B - Y-G

IG ON. Evaporator temperature at 15°C (59°F)

1.4 to 1.8 V

FRTR (A48-17) - FRSG (A48-18)

B - Y-G

IG ON. Cabin temperature at 25°C (77°F)

1.8 to 2.2 V

FRSG (A48-18) - Body ground

Y-G - Body ground

Always

Continuity

ACT (A49-4) - GND (A49-12)

L-B - W-B

Compressor operates

Below 1.0 V

Compressor does not operate

No voltage

TW (A49-5) - GND (A49-12)

Y-B - W-B

IG ON.

Pulse generation

SPD (A49-6) - GND (A49-12)

V - W-B

Turn propeller shaft slowly

Pulse generation

PSW (A49-8) - GND (A49-12)

L-W - W-B

A/C refrigerant pressure: less than 0.9 MPa (2.0 kgf/cm 2 ) or more than 3.14 MPa (32 kgf/cm 2 , 455.1 psi)

From 10 to 14 V to below 1.0 V

+B (A49-11) - GND (A49-12)

L-W - W-B

Always

Battery voltage

GND (A49-12) - Body ground

W-B - Body ground

Always

Continuity

VER4 (A49-15) * - GND (A49-12)

W-B - W-B

Always

Continuity

VER2 (A49-17) - GND (A49-12)

W-B - W-B

Always

Continuity

VER1 (A49-18) - Body ground

W-B - Body ground

Always

Continuity

IG (A49-22) - GND (A49-12)

R-L- W-B

IG ON. Light control switch "ON"

Battery voltage

IG ON. Light control switch "OFF"

No voltage

HINT:

*: w/o Navigation system

2. CHECK REAR AIR CONDITIONING AMPLIFIER

Symbols (Terminal No.)

Wiring Color

Condition

Specified Condition

+B (A33-1) - GND (A33-22)

L-W - W-B

Always

Battery voltage

IG (A33-2) - GND (A33-22)

B-W - W-B

IG ON.

Battery voltage

VMC (A33-3) - GND (A33-22)

W-L - W-B

Rr FACE mode. Rr blower switch: LO → MIDDLE → HI

7.2 → 4.2 → 0.5 V

BLWC (A33-4) - GND (A33-22)

R - W-B

Rr FACE mode. Rr blower switch: OFF → LO

Below 1.0 V → 1.5 to 3.0 V

S5 (A33-5) - SG(A33-9)

R-Y - Y-G

IG ON.

4.5 to 5.5 V

TPH (A33-6) - SG(A33-9)

GR-R - Y-G

Rr temp. control switch: Max. COOL → Max. HOT

4.0 to 1.0 V

TEC (A33-7) - SG(A33-9)

Y - Y-G

Rr evaporator temp.: 0°C (32°F)

2.0 to 2.4 V

Rr evaporator temp.: 15°C (59°F)

2.0 to 2.4 V

TINH (A33-8) - SG(A33-9)

GR-G - Y-G

Rr inlet air temp.: 25°C (77°F)

1.5 to 1.9 V

Rr inlet air temp.: 40°C (104°F)

1.2 to 1.6 V

SG(A33-9) - GND (A33-22)

Y-G - W-B

Always

Continuity

MCH (A33-11) - GND (A33-22)

W-L - W-B

Rr temp. control switch: Max. HOT → Max. COOL

Below 1.0 V → Battery voltage for 16 sec.

MHH (A33-12) - GND (A33-22)

Y - W-B

Rr temp. control switch: Max. COOL → Max. HOT

Below 1.0 V → Battery voltage for 16 sec.

HRC (A33-13) - GND (A33-22)

R-Y - W-B

Rr FACE mode. Rr blower control switch: OFF → LO

Battery voltage → Below 1.0 V

HRH (A33-14) - GND (A33-22)

L-B - W-B

Rr FOOT mode. Rr blower control switch: OFF → LO

Battery voltage → Below 1.0 V

VMH (A33-15) - GND (A33-22)

R-W - W-B

Rr FOOT mode. Rr blower control switch: LO → MIDDLE → HI

7.2 → 4.2 → 0.5 V

BLWH (A33-16) - GND (A33-22)

R-G - W-B

Rr FOOT mode. Rr blower control switch: OFF → LO

Below 1.0 V → 1.5 to 3.0 V

CID (A33-18) - GND (A33-22)

B - W-B

IG ON.

Pulse generation

CSD (A33-19) - GND(A33-22)

R - W-B

IG ON.

Pulse generation

CLKF (A33-20) - GND (A33-22)

W - W-B

IG ON.

Pulse generation

GND (A33-22) - Body ground

W-B - Body ground

Always

Continuity

IG+ (A35-1) - RG (A34-8)

L-R - G-W

IG ON.

10 to 14 V

ILL- (A35-5) - RG (A34-8)

G - G-W

IG ON. Light switch OFF → TAIL

0 → Below 1.0 V

TR (A35-7) - SGND (A35-12)

B - G-Y

IG ON. Rr room temperature: 25°C (77°F)

1.8 to 2.2 V

IG ON. Rr room temperature: 40°C (104°F)

1.2 to 1.6 V

TSET (A35-8) - SGND (A35-12)

L-O - G-Y

Rr temperature control switch: Max. COOL → Max. HOT

5.0 → 0 V

SGND (A34-12) - SG(A33-9)

G-Y - Y-G

Always

Continuity

RRAT (A34-1) - RG (A34-8)

W-G - G-W

Rr A/C control panel AUTO switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

RRAO (A34-2) - RG (A34-8)

Y-B - G-W

Rr A/C control panel OFF switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

RRLO (A34-3)- RG (A34-8)

GR - G-W

Rr A/C control panel LO switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

RRME (A34-4) - RG (A34-8)

L-Y - G-W

Rr A/C control panel ME switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

ATIN (A34-5) - GND (A33-22)

L-R - W-B

Rr A/C control panel switch: except AUTO → AUTO

Battery voltage → Below 1.0 V

LOIN (A34-6) - GND (A33-22)

L-W - W-B

Rr A/C control panel switch: except LO → LO

Battery voltage → Below 1.0 V

MEIN (A34-7) - GND (A33-22)

L - W-B

Rr A/C control panel switch: except MIDDLE → MIDDLE

Battery voltage → Below 1.0 V

RG (A34-8) - GND (A33-22)

G-W - W-B

Always

Continuity

RRHI (A34-9) - GND (A33-22)

GR-R - W-B

Rr A/C control panel HI switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

FACE (A34-10) - GND (A33-22)

R-L - W-B

Rr A/C control panel FACE switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

B/L (A34-11) - GND (A33-22)

R-Y - W-B

Rr A/C control panel B/L switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

FOOT (A34-12) - GND (A33-22)

R-G - W-B

Rr A/C control panel FOOT switch: OFF → ON (during pushed switch)

Battery voltage → Below 1.0 V

FCIN (A34-15) - GND (A33-22)

G - W-B

Rr A/C control panel switch: except FACE → FACE

Battery voltage → Below 1.0 V

BLIN (A34-16) - GND (A33-22)

W-G - W-B

Rr A/C control panel switch: except B/L → B/L

Battery voltage → Below 1.0 V

FTIN (A34-17) - GND (A33-22)

W-R - W-B

Rr A/C control panel switch: except FOOT → FOOT

Battery voltage → Below 1.0 V

HIIN (A34-18) - GND (A33-22)

L - W-B

Rr A/C control panel switch: except HI → HI

Battery voltage → Below 1.0 V