SECTION 6 ± 4
SERVICE PROCEDURES AND
SPECIFICATIONS
Electrical components
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 665 Checking battery condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 676 Battery recharging precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 682 Checking and replacing the blade type fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683 Checking the cartridge type fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 685 Adding washer fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688 Checking the headlight aim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 689 Replacing light bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 690
664
ELECTRICAL COMPONENTS
SPECIFICATIONS |
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Ð FUSES |
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Ð FUSE LOCATIONS |
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Engine compartment
(with electronically modulated air suspension)
1 Engine compartment
2 
3 Driver's side instrument panel
665
ELECTRICAL COMPONENTS
Driver's side instrument panel
Engine compartment
(without electronically modulated air suspension)
666
ELECTRICAL COMPONENTS
No. |
FUSE |
AMPERE |
CIRCUIT |
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1 |
AIRSUS |
60 |
Electronically modulated air |
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suspension |
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All components in “HEATERº, |
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“H-LP CLNº, “TAILº, “PANELº, |
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“FR FOGº, “CIGº, “RADIO NO. |
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2º, “ECU-ACCº, “PWR OUTLET |
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NO. 1º, “GAUGE NO. 1º, |
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“ECU-IG NO. 1º,“ FR WIPº, “RR |
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2 |
INP-J/B |
100 |
WIPº, “WASHERº, “SEAT HTRº, |
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“ECU-IG NO. 2º, “P/SEATº, |
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“PWRº, “TI&TEº, “RR DOOR |
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LHº, “RR DOOR RHº, “MPX-Bº, |
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“AM1º, “DOOR NO. 2º, “STOPº, |
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“OBDº, “FUEL OPNº, “AIRSUSº |
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(7.5 A), “S/ROOFº, “FR DEFº |
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and “RR FOGº fuses |
667
ELECTRICAL COMPONENTS
No. |
FUSE |
AMPERE |
CIRCUIT |
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All components in “INP-J/Bº, |
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“AIRSUSº (60 A), “ABS NO. 1º, |
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“ABS NO. 2º, “RDI FANº, “RR |
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DEFº, “HEATERº, “PBDº, “H-LP |
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CLN/MSBº, “H-LP CLNº, “PWR |
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OUTLET NO. 2º, “TOWINGº, |
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“TAILº, “PANELº, “FR FOGº, |
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“CIGº, “RADIO NO. 2º, |
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“ECU-ACCº, “PWR OUTLET |
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3 |
ALT |
140 |
NO. 1º, “GAUGE NO. 1º, |
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“ECU-IG NO. 1º, “FR WIPº, “RR |
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WIPº, “WASHERº, “HEATERº, |
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“SEAT HTRº, “ECU-IG NO. 2º, |
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“P/SEATº, “PWRº, “TI&TEº, “RR |
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DOOR LHº, “RR DOOR RHº, |
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“MPX-Bº, “AM1º, “DOOR NO. |
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2º, “STOPº, “OBDº, “FUEL |
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OPNº, “AIRSUSº (7.5 A), |
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“S/ROOFº, “FR DEFº and “RR |
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FOGº fuses |
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4 |
PBD |
30 |
Power back door |
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5 |
H-LP |
30 |
Headlight cleaner |
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CLN/MSB |
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6 |
H-LP CLN |
30 |
Headlight cleaner |
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668
ELECTRICAL COMPONENTS
No. |
FUSE |
AMPERE |
CIRCUIT |
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Anti-lock brake system, vehicle |
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7 |
ABS NO. 1 |
30 |
stability control system, traction |
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control system, brake assist |
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system |
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8 |
RR DEF |
40 |
Rear window defogger |
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9 |
HEATER |
50 |
Air conditioning system, rear |
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window defogger |
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10 |
DRL |
7.5 |
Daytime running light system |
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11 |
H-LP L |
15 |
Left-hand headlight (low beam) |
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LWR |
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12 |
H-LP L |
15 |
Left-hand headlight (high beam) |
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UPR |
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13 |
H-LP R |
15 |
Right-hand headlight (high |
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UPR |
beam) |
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14 |
PWR |
20 |
Power outlet |
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OUTLET |
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NO. 2 |
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15 |
TOWING |
30 |
Trailer lights |
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Anti-lock brake system, vehicle |
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16 |
ABS NO. 2 |
50 |
stability control system, traction |
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control system, brake assist |
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system |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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17 |
RDI FAN |
50 |
Electric cooling fan |
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18 |
HAZ |
15 |
Turn signal lights |
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19 |
CRT |
7.5 |
Audio system |
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669
ELECTRICAL COMPONENTS
20 |
ALT-S |
7.5 |
Charging system |
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21 |
ETCS |
10 |
Multiport fuel injection |
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system/sequential multiport fuel |
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injection system |
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22 |
HORN |
10 |
Horns |
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Daytime running light system, |
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left-hand headlight, right-hand |
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23 |
MAIN |
40 |
headlight, all components in |
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“H-LP R LWRº, “H-LP R UPRº, |
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“H-LP L UPRº, “H-LP L LWRº |
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and “DRLº fuses |
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24 |
AM2 |
30 |
Starting system, all components |
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in “GAUGE NO. 2º, “IGNº and |
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“INJº fuses |
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25 |
RADIO |
15 |
Audio system, navigation system |
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NO. 1 |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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Power window, multiplex |
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communication system, gauge |
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and meters, instrument cluster |
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lights, instrument panel lights, air |
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conditioning system, garage |
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26 |
ECU-B |
7.5 |
door opener, illuminated entry |
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system, wireless remote control |
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system, power back door, driving |
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position memory system, |
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navigation system display, moon |
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roof, tilt and telescopic steering, |
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power seats, outside rear view |
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mirror, windshield wipers |
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670
ELECTRICAL COMPONENTS
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Gauge and meters, personal |
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lights, vanity lights, door |
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27 |
DOME |
7.5 |
courtesy lights, inside door |
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handle lights, ignition switch |
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light, foot lights, scuff plate lights, |
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luggage compartment light, |
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interior light |
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28 |
TEL |
7.5 |
No circuit |
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29 |
AMP |
30 |
Audio system |
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30 |
DOOR |
25 |
Multiplex communication system |
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NO. 1 |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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31 |
A/F |
25 |
Multiport fuel injection |
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system/sequential multiport fuel |
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injection system |
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Multiport fuel injection |
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32 |
EFI NO. 1 |
25 |
system/sequential multiport fuel |
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injection system and all |
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components in “EFI NO. 2º fuse |
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33 |
H-LP R |
15 |
Right-hand headlight (low beam) |
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LWR |
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34 |
EFI NO. 2 |
10 |
Multiport fuel injection |
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system/sequential multiport fuel |
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injection system |
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35 |
RR DOOR |
20 |
Rear right side power window |
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RH |
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36 |
RR DOOR |
20 |
Rear left side power window |
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LH |
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37 |
FUEL |
7.5 |
Fuel filler door opener |
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OPN |
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671
ELECTRICAL COMPONENTS
38 |
FR FOG |
15 |
Front fog lights |
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39 |
OBD |
7.5 |
On-board diagnosis system |
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40 |
FR DEF |
25 |
Windshield wiper de-icer and all |
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components in “MIR HTRº fuse |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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Tail lights, high mounted |
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stoplight, rear light failure |
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warning light, anti-lock brake |
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system, vehicle stability control |
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41 |
STOP |
10 |
system, traction control system, |
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brake assist system, |
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electronically modulated air |
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suspension, shift lock control |
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system, multiport fuel injection |
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system/sequential multiport fuel |
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injection system |
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42 |
TI&TE |
30 |
Tilt and telescopic steering |
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43 |
MPX-B |
7.5 |
No circuit |
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44 |
AM1 |
7.5 |
Starter system |
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45 |
RR FOG |
7.5 |
No circuit |
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46 |
AIR SUS |
7.5 |
Electronically modulated air |
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suspension |
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47 |
DOOR |
25 |
Multiplex communication system |
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NO. 2 |
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48 |
S/ROOF |
30 |
Moon roof |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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672
ELECTRICAL COMPONENTS
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Front fog lights, instrument |
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49 |
TAIL |
10 |
cluster lights, instrument panel |
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lights, front side marker lights, |
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tail lights, license plate lights, |
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towing converter |
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Glove box light, instrument |
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cluster lights, instrument panel |
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lights, console box light, audio |
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system, power outlet, garage |
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50 |
PANEL |
7.5 |
door opener switch, |
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electronically controlled |
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automatic transmission system, |
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headlight cleaner, electronically |
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modulated air suspension, seat |
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heaters, steering switches, |
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power back door |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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Power rear view mirror control, |
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moon roof, multiplex |
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communication system, |
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navigation system display, shift |
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lock control system, multiplex |
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communication system (power |
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door lock system, wireless |
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51 |
ECU-IG |
7.5 |
remote control system), driving |
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position memory system, vehicle |
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NO. 1 |
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stability control system, traction |
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control system, windshield |
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wipers, electronically controlled |
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automatic transmission, seat |
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heaters, power seats, tilt and |
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telescopic steering, power back |
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door, electronically modulated air |
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suspension |
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673
ELECTRICAL COMPONENTS
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Automatic headlight leveling |
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52 |
ECU-IG |
10 |
system, vehicle stability control |
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system, dynamic laser cruise |
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NO. 2 |
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control, headlight cleaner, |
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adaptive front-lighting system |
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Electric cooling fan, air |
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53 |
HEATER |
7.5 |
conditioning system, rear |
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window defogger, ignition switch, |
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windshield wiper de-icer |
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No. |
FUSE |
AMPERE |
CIRCUIT |
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54 |
WASHER |
20 |
Windshield washer |
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55 |
SEAT HTR |
20 |
Seat heaters |
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Instrument cluster lights, |
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instrument panel lights, |
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GAUGE |
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emergency flashers, seat belt, |
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56 |
7.5 |
power outlet, rear light failure |
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NO. 1 |
warning light, multiport fuel |
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injection system/sequential |
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multiport fuel injection system, |
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back-up lights |
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57 |
FR WIP |
30 |
Windshield wipers |
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58 |
RR WIP |
15 |
Rear window wiper |
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59 |
INJ |
20 |
Multiport fuel injection |
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system/sequential multiport fuel |
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injection system |
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SRS airbag system, multiport |
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60 |
IGN |
10 |
fuel injection system/sequential |
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multiport fuel injection system, |
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front passenger occupant |
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classification system, stop lights |
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61 |
GAUGE |
7.5 |
Gauge and meters |
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NO. 2 |
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674
ELECTRICAL COMPONENTS
No. |
FUSE |
AMPERE |
CIRCUIT |
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Navigation system display, |
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62 |
ECU-ACC |
7.5 |
power rear view mirror control, |
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shift lock control system, |
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multiplex communication system |
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63 |
CIG |
15 |
Cigarette lighter, power outlet |
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64 |
PWR |
15 |
Power outlet |
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OUTLET |
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NO. 1 |
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65 |
RADIO |
7.5 |
Instrument cluster lights, |
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instrument panel lights, |
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NO. 2 |
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navigation system, audio system |
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66 |
MIR HTR |
10 |
Outside rear view mirror |
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defogger |
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67 |
P/SEAT |
30 |
Power seats |
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Power window, multiplex |
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68 |
PWR |
30 |
communication system (power |
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door lock system, wireless |
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remote control system), outside |
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rear view mirror |
675
ELECTRICAL COMPONENTS
CHECKING BATTERY CONDITION
Precautions
CAUTION
BATTERY PRECAUTIONS
The battery produces flammable and explosive hydrogen gas.
Do not cause a spark by contacting the battery terminals with tools.
Do not smoke or light a match near the battery.
The electrolyte contains poisonous and corrosive sulfuric acid.
Avoid contact with eyes, skin or clothes.
Never inhale or swallow electrolyte.
Wear protective safety glasses when working near the battery.
Keep children away from the battery.
EMERGENCY MEASURES
If electrolyte gets in your eyes, flush your eyes with clean water immediately and get immediate medical attention. If possible, continue to apply water with a sponge or cloth while traveling to the medical office.
676
ELECTRICAL COMPONENTS
If electrolyte gets on your skin, thoroughly wash the contacted area. If you feel a pain or burn, get medical attention immediately.
If electrolyte gets on your clothes, there is a possibility of its soaking through to your skin, so immediately take off the exposed clothing and follow the procedure above, if necessary.
If you accidentally swallow electrolyte, drink a large quantity of water or milk. Follow with milk of magnesia, beaten raw egg or vegetable oil. Then go immediately for emergency help.
677
ELECTRICAL COMPONENTS
Checking battery exterior
Check the battery for corroded or loose connections, cracks, or loose hold-down clamps.
1.If the battery is corroded, wash it off with a solution of warm water and baking soda. Coat the terminals with grease to prevent further corrosion.
2.If the connections are loose, tighten the clamp bolts Ð but do not overtighten.
3.Tighten the hold-down clamp only enough to keep the battery firmly in place. Overtightening may damage the battery case.
1 Terminals |
2 Hold-down clamp |
678
ELECTRICAL COMPONENTS
NOTICE
Make sure the engine and all accessories are turned off before performing maintenance.
When checking the battery, remove the ground cable first and reinstall it last.
Be careful not to cause a short circuit with tools.
Take care no solution gets into the battery when washing it.
If the battery is disconnected or run down |
Checking battery condition |
The following functions may not operate correctly and the jam protection function will not function correctly when you reconnect or replace the battery. In these cases, you should do the each instructions referring on the following pages.
Power back door (See page 46.)
Power windows (See page 74.)
Moon roof (See page 147 or 151.)
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ELECTRICAL COMPONENTS
Checking by indicator
Type A
Type B
Check the battery condition by the indicator color.
Type A Ð
1BLUE Ð Good condition
2WHITE Ð Charging necessary. Have the battery checked by your Lexus dealer.
3RED Ð Have the battery checked by your Lexus dealer. Type B Ð
1GREEN Ð Good condition
2DARK Ð Charging necessary. Have the battery checked by your Lexus dealer.
3CLEAR or LIGHT YELLOW Ð Have the battery checked by your Lexus dealer.
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ELECTRICAL COMPONENTS
NOTICE
Do not refill the battery with water.
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ELECTRICAL COMPONENTS
BATTERY RECHARGING
PRECAUTIONS
During recharging, the battery is producing hydrogen gas.
Therefore, before recharging:
1.If recharging with the battery installed on the vehicle, be sure to disconnect the ground cable.
2.Make sure the power switch on the recharger is off when connecting the charger cables to the battery and when disconnecting them.
NOTICE
Never recharge the battery while the engine is running. Also, be sure all accessories are turned off.
CAUTION
Always charge the battery in an unconfined area. Do not charge the battery in a garage or closed room where there is not sufficient ventilation.
Only do a slow charge (5 A or less). Charging at a quicker rate is dangerous. The battery may explode causing personal injuries.
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ELECTRICAL COMPONENTS
CHECKING AND REPLACING THE
BLADE TYPE FUSES
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Driver's side instrument panel |
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1. Turn the ignition switch off and remove the fuse box lid. |
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Engine compartment |
1 Pull-out tool |
2 Spare fuses |
Determine which fuse may be causing the problem. The lid of |
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the fuse box shows the name of the circuit for each fuse. |
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ELECTRICAL COMPONENTS
2. Make sure the inoperative component is turned off. Pull the suspected fuse straight out with the pull-out tool and check it. If it has blown, push a new fuse into the clips.
Good |
Blown |
1.Look carefully at the fuse. If the thin wire is broken, the fuse has blown. If you are not sure or if it is too dark to see, try replacing the suspected fuse with one of the same value that you know is good.
2.Only install a fuse with the amperage rating designated on the fuse box lid.
If you do not have a spare fuse, in an emergency you can pull out the “RADIO NO.1º, “RADIO NO.2º or “PWR OUTLET NO.1º fuse, which may be dispensable for normal driving, and use it if its amperage rating is the same.
If you cannot use one of the same amperage, use one lower than, but as close to the amperage as possible. If the amperage is lower than that specified, the fuse might blow out again but this does not indicate anything wrong. Be sure to get the correct fuse as soon as possible and return the substitute to its original clips.
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ELECTRICAL COMPONENTS
It is a good idea to purchase a set of spare fuses and keep them in your vehicle for emergencies.
If the new fuse immediately blows out, there is a problem with the electrical system. Have your Lexus dealer correct it as soon as possible.
You should normalize the power back door, power windows and moon roof if they do not work or the jam protection function does not operate correctly after replacing blown fuses. In these cases, you should do the each instructions referring on the following pages.
Power back door (See page 46.)
Power windows (See page 74.)
Moon roof (See page 147 or 151.)
CAUTION
Never use a fuse with a higher amperage rating, or any other object, in place of a fuse. This may cause extensive damage and possibly a fire.
CHECKING THE CARTRIDGE TYPE
FUSES
Engine compartment
Driver's side instrument panel
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ELECTRICAL COMPONENTS
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If the headlights or other electrical components do not |
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work and the blade type fuses are O.K., check the |
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cartridge type fuses. If any of the cartridge type fuses are |
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blown, they must be replaced. |
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If there is an overload in the circuits from the battery, the fuses |
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are designed to blow before the entire wiring harness is |
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damaged. |
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CAUTION |
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1 Type A |
2 Type B |
3 Good |
4 Blown |
Always use a genuine Lexus fuse or equivalent for |
replacement. Never install an ordinary wire Ð even for |
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a temporary fix. This may cause extensive damage and |
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possibly a fire. |
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ELECTRICAL COMPONENTS
NOTICE
Before replacing the fuses, have the cause of electrical overload determined and repaired by your Lexus dealer.
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ELECTRICAL COMPONENTS
ADDING WASHER FLUID
If the washer tank becomes nearly empty, add washer fluid.
NOTICE
Do not use engine antifreeze or any other substitute because it may damage your vehicle's paint.
You may use plain water as washer fluid. However, in cold areas where temperatures range below the freezing point, use washer fluid containing antifreeze. This product is available at your Lexus dealer and most auto parts stores. Follow the manufacturer's directions for how much to mix with water.
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ELECTRICAL COMPONENTS
CHECKING THE HEADLIGHT AIM (vehicles with discharge headlight)
Adjusting the vertical aiming
1 Vertical movement adjusting screw
2 Vertical movement adjusting bolt
Before checking the headlight aim:
1.Be sure that the body around the headlight is not deformed.
2.Park the vehicle on a level spot.
3.The driver gets into the driver's seat and puts the vehicle in a state readying for a driving (with a full tank).
4.Bounce the vehicle several times.
1. Turn the Phillips-head screwdriver to either direction in order to turn the vertical movement adjusting screw ( 1 ).
Remember the number of times you turn the screwdriver and the turning direction.
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ELECTRICAL COMPONENTS
2. When turning the vertical movement adjusting bolt ( 2 ), turn the Phillips-head screwdriver to the same direction as step 1. To calculate the correct number of turns, multiply the number of times you turned the screwdriver in step 1 by 1.25. Turn the screwdriver by this amount.
REPLACING LIGHT BULBS
The illustration on the following pages show the locations of light bulbs. If it is necessary to replace a bulb, take your vehicle to your Lexus dealer as soon as possible. Use bulbs with the bulb numbers and wattage ratings given in the table.
The stop lights consist of a number of LEDs. If two or more LEDs burn out, your vehicle may not conform to local laws (SAE). If this occurs, take your vehicle to your Lexus dealer to have the light replaced.
CAUTION
To prevent burning yourself, do not replace the light bulbs while they are hot.
Halogen bulbs have pressurized gas inside and require special handling. They can burst or shatter if scratched or dropped. Hold a bulb only by its plastic or metal case. Do not touch the glass part of a bulb with bare hands.
Vehicles with power back door system Ð
When replacing the rear light bulbs, turn off the power back door system.
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ELECTRICAL COMPONENTS
Vehicles with discharge headlights Ð
Do not touch the high voltage socket when the low beam headlight turns on. 20000 V is momentarily generated and may cause severe injury by electric shock.
Do not disassemble, repair or take apart the low beam headlight bulbs, connector, power supply circuits and rotated components. Or you may be injured by electric shocks. Call your dealer when the headlights fail to work or have to be replaced or disposed of.
NOTICE |
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Only use a bulb of the listed type. |
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LIGHT LOCATION |
The inside of the lens of exterior lights such as headlights may |
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temporarily fog up when the lens becomes wet in the rain or in |
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a car wash. This is not a problem because the fogging is |
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caused by the temperature difference between the outside and |
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inside of the lens, just like the windshield fogs up in the rain. |
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However, if there is a large drop of water on the inside of the |
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lens, or if there is water pooled inside the light, contact your |
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Lexus dealer. |
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Light Bulbs |
Bulb No. |
W |
Type |
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1 |
Parking lights |
168 |
5 |
F |
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2 |
Front turn signal lights |
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21 |
H |
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3 |
Front side marker lights |
168 |
5 |
F |
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4 |
Headlights (low beam) |
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Discharge bulb |
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35 |
B |
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Halogen bulb |
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55 |
C |
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ELECTRICAL COMPONENTS
5 |
Headlights (high beam) |
9005 |
60 |
A |
6 |
Fog lights |
9006 |
51 |
D |
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ELECTRICAL COMPONENTS
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Light Bulbs |
Bulb No. |
W |
Type |
7 |
Rear turn signal lights |
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21 |
H |
8 |
Tail lights |
168 |
5 |
F |
9 |
License plate lights |
168 |
5 |
F |
10 |
Back-up lights |
921 |
18 |
F |
11 |
Rear side marker lights |
194 |
3.8 |
F |
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