AUTOMATIC AIR CONDITIONING

Transcription

1 UTOMTIC I CONDITIONING FOM POE SOUCE SSTEM (SEE PGE ) F 9 FUSIBLE LINK BLOCK 0 HETE 9 HETE 7. GUGE 7. DIO NO. 8 G K 0 K K L B B G H D C D E C L B H 8 HETE EL L L IG +B IG L O B, B 7 C, B 8 D BOD ECU B, B B BLOE MOTO CONTOL EL M B B BLOE MOTO IG 9 C H MPX MPX 0 D B O (*) B (*) MPX+ 0 B L G G B I 0 I 9 B IG+ B CC I6, I8 G +B GND TX TX+(*) CC TX TX+(*) INSTUMENT CONTOL PNEL GND M+ M SI GND MPX +B B B 9 (*) 7 B B B (*) B C 8 (*) 6 C (*) (*) C B B (*) 0 B TX B 7 (*) B (*) TX+ M, M 6 B, M 8 C MULTI DISPL J 9 JUNCTION CONNECTO IG 00 LEXUS X 00 (ED9U)

2 FOM POE SOUCE SSTEM (SEE PGE ) K 7. ECU B 8 IJ 8 E 0 DOME K 0 G 9 F 8 B * : /O LEXUS NVIGTION SSTEM * : / LEXUS NVIGTION SSTEM 7 F D J JUNCTION CONNECTO C C 8 E MG CLT EL MPX MPX 0 F FONT PSSENGE DOO ECU IM C IL EB G 6 I B 0 E 9 H 8 6 B 0 IL 0 C EC B MPX CMG MPX LCKI PE E, E 6 B, E 7 C ENGINE CONTOL MODULE 6 /C DUL PESSUE S J JUNCTION CONNECTO /C MGNETIC CLUTCH ND LOCK SENSO B B J0 JUNCTION CONNECTO IH ED EC 00 LEXUS X 00 (ED9U)

3 UTOMTIC I CONDITIONING V MPX MPX 0 BB E DOO H ECU BB BD MPX MPX 0 B E DOO LH ECU B 0 V V V 0 I IC MPX MPX IC D7 DIVE DOO ECU L G LG B IJ IE C C C C C C 7 C E BL IG MPX+ B B MPX TP MH MC S TPO OD OF SG TE 7 C 6 C B 9 B B 6 B B B B B 8 B IJ IJ B B G G L L G LG B B G G C, C B, C C /C ECU [COMB. METE ECU] V TM SG T SG TS S IF I SG TPI S EC 7 EC B /C MBIENT TEMP. SENSO G 6 /C OOM TEMP. SENSO 7 /C SOL SENSO 7 6 M G L I INLET CONTOL SEVO MOTO 00 LEXUS X 00 (ED9U)

4 L G LG B G IF 6 IF 0 IF IF IF IF 7 IF 8 IF 9 IF G LG G B G B B LG G L I0 G B I0 I0 LG G B G G B G B G /C EVPOTO TEMP. SENSO M M I VENT MODE CONTOL SEVO MOTO I MIX CONTOL SEVO MOTO 00 LEXUS X 00 (ED9U)

5 UTOMTIC I CONDITIONING SSTEM OUTLINE. HETE BLOE OPETION MNUL OPETION hen the blower control S is set to any blower speed, the /C ECU sends a signal to the blower motor control relay, and controls the speed of the blower motor. UTO OPETION hen the auto S is operated, the /C ECU sends a signal to the blower motor control relay, according to the signals from each sensors and commands from the temperature S, and controls the blower motor speed automatically.. I INLET CONTOL SEVO MOTO CONTOL hen the FESH/ECIC select S is switched to ECIC, the motor in the air inlet control servo motor rotates to move the damper to the ECIC side. The damper position is recognized by the TEMINL TPI of the /C ECU, and rotates the motor until the damper reaches its position. hen the FESH/ECIC select S is switched to FESH, the motor in the air inlet control servo motor rotates to move the damper to the FESH side. The damper position is recognized by the TEMINL TPI of the /C ECU, and rotates the motor until the damper reaches its position.. I VENT MODE CONTOL SEVO MOTO CONTOL hen the mode select S in the instrument control panel is pushed, a signal is sent from TEMINL MPX of the instrument control panel to TEMINL MPX+ of the /C ECU, and activates the air vent mode control servo motor. This causes the servo motor to rotate to the position selected using the mode select S (FCE, BI LEVEL, FOOT, FOOT/DEF, DEF), and moves the damper door.. I MIX CONTOL SEVO MOTO CONTOL hen the temperature control S in the instrument control panel is pushed, a signal is sent from TEMINL MPX of the instrument control panel to TEMINL MPX+ of the /C ECU, and activates the air mix control servo motor. The motor and damper door is moved until it reaches the temperature set by the temperature control S.. I CONDITIONING OPETION The /C ECU receives various signals, i.e., the engine PM from the crankshaft position sensor, outlet temperature from the /C ambient temp. sensor, coolant temperature from the water temp. sensor, and the lock signal from the /C compressor, etc. hen the engine is started and the /C S in the instrument control panel is pressed, a signal is input from TEMINL MPX of the instrument control panel to TEMINL MPX+ of the /C ECU. s a result, the ground circuit in the /C ECU is closed, and the current flows from the HETE fuse to MG CLT relay TEMINL to TEMINL to TEMINL CMG of the engine control module to TEMINL MPX to TEMINL MPX of the body ECU to TEMINL MPX to TEMINL MPX+ of the instrument control panel to TEMINL MPX to TEMINL MPX+ of the /C ECU to TEMINL E to GOUND, turning the /C magnetic clutch on so that /C compressor operates. In addition, when the engine control module detects that the magnetic clutch is on and the /C compressor is operating, it controls the engine in the direction to avoid lowering the engine rpm during /C operation. hen any of the following signals are sent to the /C ECU, the /C is turned off. Coolant temp. is high. Outlet air temp. is low. Large difference between the engine speed and compressor speed. The refrigerant pressure is abnormally high or low. SEVICE HINTS /C DUL PESSUE S : Open with the refrigerant pressure at less than approx..0 kgf/cm ( psi, 96 kpa) or more than approx. kgf/cm ( psi, 8 kpa) C (), C (B), C (C) /C ECU [COMB. METE ECU] (C) GOUND : lways approx. volts (C) GOUND : lways approx. volts (B) GOUND : pprox. volts with the FESH S on (B) GOUND : pprox. volts with the ECIC S on (C) GOUND : lways continuity 6 00 LEXUS X 00 (ED9U)

6 : PTS LOCTION Code See Page Code See Page Code See Page B H8 B7 C I6 B8 D I8 B C J 6 C B J 7 C C J9 D7 6 J0 E M E6 B M6 B B E7 C M8 C B F9 7 B B F 6 7,,,,,, : JUNCTION BLOCK ND IE HNESS CONNECTO Code See Page Junction Block and ire Harness (Connector Location) G Cowl ire and Instrument Panel J/B (Lower Finish Panel) K Instrument Panel ire and Instrument Panel J/B (Lower Finish Panel) C E H B D Cowl ire and Engine oom J/B (Engine Compartment Left) Engine oom Main ire and Engine oom J/B (Engine Compartment Left) E 6 Instrument Panel ire and J/B No. (Behind the Instrument Panel Center) F H I B C D E 8 Cowl ire and J/B No. (Behind the Instrument Panel Left) : CONNECTO JOINING IE HNESS ND IE HNESS Code See Page Joining ire Harness and ire Harness (Connector Location) EB 0 Engine ire and Engine oom Main ire (Under the Engine oom J/B) EC 0 Cowl ire and Engine oom Main ire (Under the Engine oom J/B) I Cowl ire and Floor No. ire (Left Kick Panel) IC Front Door LH ire and Cowl ire (Left Kick Panel) IE Instrument Panel ire and Cowl ire (Lower Finish Panel) IF Instrument Panel ire and /C Sub No. ire (Instrument Panel Brace H) IG Cowl ire and /C Sub No. ire (Instrument Panel Brace H) IJ Cowl ire and Instrument Panel ire (Behind the Glove Box) IL Front Door H ire and Cowl ire (ight Kick Panel) IM Cowl ire and Floor ire (ight Kick Panel) B 6 ear Door LH ire and Floor No. ire (Under the Left Center Pillar) BB 6 ear Door H ire and Floor ire (Under the ight Center Pillar) BD 6 Floor No. ire and Floor ire (Upper the ear xle Housing Left) 00 LEXUS X 00 (ED9U) 7

7 UTOMTIC I CONDITIONING : GOUND POINTS Code See Page Ground Points Location EC 0 ear Side of Surge Tank ED 0 ight adiator Side Support IG Cowl Side Panel H IH Instrument Panel Brace H : SPLICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points I0 /C Sub No. ire 8 00 LEXUS X 00 (ED9U)

8 MEMO 00 LEXUS X 00 (ED9U) 9