1999 Lexus ES300 Charging system

GAUGES, METERS AND SERVICE REMINDER INDICATORS
61
(d) Discharge Warning Light
This light warns that the battery is being discharged.
If it comes on while you are driving, stop the vehicle, turn
off the engine, and check for the cause. Look first at the
engine drive belt.
If it is loose or broken, the generator will not charge
the battery properly.
 If the belt is O.K., there is a problem somewhere in the
charging system.
The engine ignition will continue to operate, however,
until the battery is discharged. Turn off the air
conditioning, blower, radio, etc., and drive directly to the
nearest Lexus dealer or repair shop.
NOTICE
Do not continue driving if the engine drive belt is broken or loose.
(e) Low Oil Pressure Warning Light
This light warns that the engine oil pressure is too low.
If it flickers or stays on while you are driving, pull off the
road to a safe place and stop the engine immediately.
Call a Lexus dealer or qualified repair shop for
assistance.
The light may occasionally flicker when the engine is
idling or it may come on briefly after a hard stop. There
is no cause for concern if it then goes out when the
engine is accelerated slightly.
The light may come on when the oil level is extremely
low. It is not designed to indicate low oil level, and the
oil level must be checked using the oil level dipstick.
NOTICE
Do not drive the vehicle with the warning light on± even for one block. It may ruin the engine.

ENGINE
372± IGNITION SYSTEM
Spark plug ± Make DENSO NGK
± Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
± ELECTRICAL SYSTEM
Battery ± Maintenance type battery Specific gravity reading at 20 C (68F):
Charging rates Quick charge Slow charge
± Non±maintenance battery Open voltage at 20C (68F):
Charging rates
1.260 Fully charged
1.160 Half charged
1.060 Discharged
15A max.
5A max.
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the key is
removed with all the lights turned off]
5A max.

ELECTRICAL COMPONENTS
412
No.FUSEAMPERECIRCUIT
1 ABS60Anti±lock brake system
2 DRL NO.25Daytime Running Light System
3 HEAD
LH (LWR)10Left±hand headlight (low beam)
4 HEAD
RH (LWR)10Right±hand headlight (low
beam)
5 ALT100Charging system
6 T±STK40No circuit
7 HTR50Air conditioning system, Seat
heater
8 MAIN40Headlight, Starting system
9 DOME7.5
Theft deterrent system, Clock,
Door courtesy light, Interior
light, Ignition switch light, Vanity
light, Wireless remote control
system
10 ECU±B10Air conditioning system,
Power seat system
11 RAD NO.120Audio system
12 HAZARD10Emergency flashers, Turn
signal lights

ELECTRICAL COMPONENTS
413
No.FUSEAMPERECIRCUIT
13 AM230Starting system
14 TEL5Telephone
15 HEAD
LH (UPR)15Left±hand headlight (high
beam)
16 ALT±S5Charging system
17 HEAD RH (UPR)15Right±hand headlight
(high beam)
18 EFI15Multiport fuel injection
19 HORN10Theft deterrent system
20 RDI30Electronic cooling fan
system
21 CDS30Air conditioning system
22 A/F HTR25Air fuel ration sensor
23 A/C10No circuit
24 SEAT±
HEATER20Seat heater system
25 HEATER10Air conditioning system
26 GAUGE10
Gauges and meters,
service reminder
indicators and warning
buzzers, Back±up light,
Door courtesy light, Seat
heater, Power window
system
No.FUSEAMPERECIRCUIT
27 WIPER25Windshield wipers and
washer
28 MIRROR± HTR10Outside rear view mirror
defogger
29 ECU±IG15
Cruise control system,
Anti±lock brake system,
Shift lock system, Theft
deterrent system,
Electronic modulated
suspension, Wireless
remote control
30 IGN5SRS, Multiport fuel
injection
31 STOP15
Stop lights, High mounted
stoplight, Cruise control
system, Electronic
modulated suspension,
Anti±lock brake system,
Shift lock system, Power
seat system, Multiport
fuel injection
32 TAIL10Tail light, Side marker
lights, License plate lights
33 POWER±OUTLET15Power outlet
34 OBD7.5On±board diagnosis
system
35 FOG15Fog lights