TOYOTA CAMRY 2000 Service Repair Manual

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)
The current from the FL MAIN is always flowing from the MAIN fuse to HEAD relay (Coil side) to TERMINAL H±LP of the
daytime running light relay (Main), from DOME fuse to TERMINAL +B of the daytime running light relay (Main) and from the
ALT fuse to Taillight relay (Coil side) to TERMINAL TAIL (TMMK Made) of the daytime running light relay (Main).
When the ignition SW is turned on, the current flowing through the GAUGE fuse flows to TERMINAL IG of the daytime
running light relay (Main).
1. DAYTIME RUNNING LIGHT OPERATION
When the engine is started, voltage generated at TERMINAL L of the generator is applied to TERMINAL CHG± of the
daytime running light relay (Main). If the parking brake lever is pulled up (Parking brake SW on) at this time, the relay is not
activated so the daytime running light system does not operate. If the parking brake lever is then released (Parking brake
SW off), a signal is input to TERMINAL PKB of the relay.
This activates the daytime running light relay (Main) and the HEAD relay is turned to on, so the current flows from the MAIN
fuse to the HEAD relay (Point side) to TERMINAL 1 of the DIM relay to TERMINAL 4 to H±LP LH (LWR), H±LP RH (LWR)
fuses to TERMINAL 1 of the headlights to TERMINAL 3 to TERMINAL 1 of the daytime running light resistor to TERMINAL 2
to GROUND, causing the headlights to light up (Headlights light up dimmer than normal brightness.). Once the daytime
running light system operates and the headlights light up, the headlights remain on even if the parking brake lever is pulled
up (Parking brake SW on).
If the engine stalls and the ignition SW remains on, the headlights remain light up even through current is no longer output
from TERMINAL L of the generator. If the ignition SW is then turned off, the headlights go off.
If the engine is started with the parking brake lever released (Parking brake SW off), the daytime running light system
operates and headlights light up when the engine starts.
2. HEADLIGHT OPERATION
When the light control SW is switched to HEAD position and the dimmer SW is set to LOW position, causing the daytime
running light relay (Main) and the HEAD relay to turn on, so the current flows from the MAIN fuse to HEAD relay (Point side)
to DRL NO.2 fuse to TERMINAL 3 of the DRL NO.4 relay to TERMINAL 4 to TERMINAL H±ON of the daytime running light
relay (Main) to TERMINAL H to TERMINAL 3 of the integration relay to TERMINAL 4 to TERMINAL 13 of the light control
SW to TERMINAL 16 to GROUND, activating the DRL. NO.4 relay. The current to HEAD relay (Point side) then flows to
TERMINAL 1 of the DIM relay to TERMINAL 4 to H±LP LH (LWR), H±LP RH (LWR) fuses to TERMINAL 1 of the headlights
to TERMINAL 3 to TERMINAL 1 of the DRL NO.4 relay to TERMINAL 2 to GROUND, causing the headlights to light up at
normal intensity.
When the light control SW is switched to HEAD position and the dimmer SW is set to HIGH position, the signal from the
dimmer SW is input to the daytime running light relay (Main). This activates the daytime running light relay (Main) and the
HEAD relay is turned on, so the current flows from the MAIN fuse to HEAD relay (Point side) to TERMINAL 1 of the DIM
relay to TERMINAL 3 to TERMINAL DIM of the daytime running light relay (Main), activating the DIM relay. This causes
current to flow from TERMINAL 1 of the DIM relay to TERMINAL 2 to HEAD LH (UPR), HEAD RH (UPR) fuses to TERMINAL
2 of the headlights to TERMINAL 3 to TERMINAL 1 of the DRL NO.4 relay to TERMINAL 2 to GROUND, causing the
headlights to light up at high beam and the high beam indicator light to light up.
When the dimmer SW is switched to FLASH position, the signal from the dimmer SW is input to the daytime running light
relay (Main). This activates the daytime running light relay (Main) and the HEAD relay is turned on, so the current flows from
the MAIN fuse to HEAD relay (Point side) to DRL NO.2 fuse to TERMINAL 3 of the DRL NO.4 relay to TERMINAL 4 to
TERMINAL H±ON of the daytime running light relay (Main) to TERMINAL H to TERMINAL 8 of the dimmer SW to
TERMINAL 16 to GROUND, activating the DRL NO.4 relay. At the same time, the current flows from the TERMINAL 1 of the
DIM relay to TERMINAL 3 to TERMINAL DIM of the daytime running light relay (Main), activating the DIM relay, and also
flows from the HEAD LH (UPR), HEAD RH (UPR) fuses to TERMINAL 2 of the headlights to TERMINAL 3 to TERMINAL 1 of
the DRL NO.4 relay to TERMINAL 2 to GROUND, causing the headlights to light up at high beam and the high beam
indicator light to light up.
SYSTEM OUTLINE

3. AUTOMATIC LIGHT CONTROL OPERATION
When the daytime running light is operating and the Automatic control sensor detects a decrease in the ambient light (It
continues less than approx. 2500 lux over about 20 seconds, and it is less than 1000 lux.), the automatic light control
operation starts. At the same time, daytime running light relay (Main) is activated, so current flows from the ALT fuse to the
Taillight relay (Coil side) to TERMINAL TAIL of the daytime running light relay (Main), and the DRL NO.2 fuse to the DRL
NO.4 relay (Coil side) to TERMINAL H±ON of the daytime running light relay (Main), activating both the Taillight relay and the
DRL NO.4 relay, so that the taillights and headlights light up.
When the automatic light control sensor detects an increase in the ambient light (It continues more than approx. 1000 lux
over about 20 seconds, and it is more than approx. 2500 lux), the ignition SW is turned to off, the light control SW is turned to
HEAD position, and the automatic light control operation stops.
HEAD RELAY [ENGINE ROOM J/B NO.2]
1±2 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake lever is released (Parking brake SW off)
TAILLIGHT RELAY [INSTRUMENT PANEL J/B]
5±3 : Closed with the light control SW at TAIL or HEAD position
D6 DAYTIME RUNNING LIGHT RELAY (MAIN)
2±GROUND : Approx. 12 volts with the ignition SW at ON position
5, 7,17±GROUND : Approx. 12 volts with the light control SW at HEAD position or the dimmer SW at FLASH position
Approx. 12 volts with the engine running and the parking brake lever is released
(Parking brake SW off)
6,15±GROUND : Always approx. 12 volts
8±GROUND : Continuity with the parking brake lever pulled up
11±GROUND :13.9±15.1 volts with the engine running at 2000 rpm 25°C (77°F)
12±GROUND : Approx. 12 volts with the high beam light up
13±GROUND : Always continuity
16±GROUND : Continuity with the dimmer SW at HIGH or FLASH position
18±GROUND : Continuity with the brake fluid level not enough
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A4030F6C26 (1MZ±FE)J131
B226 (1MZ±FE)F6C28 (5S±FE)J231B228 (5S±FE)F9F26 (1MZ±FE)J431
C9B30F9F28 (5S±FE)J531
C10C30G226 (1MZ±FE)J731
C1330G228 (5S±FE)J1131
D226 (1MZ±FE)H126 (1MZ±FE)J27A31D228 (5S±FE)H128 (5S±FE)J28B31
D630H226 (1MZ±FE)P331
F4A26 (1MZ±FE)H228 (5S±FE)F4A28 (5S±FE)I1730
SERVICE HINTS

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
224Engine Room R/B No.2 (Near the Battery)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1C20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1V20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1W
()
2B22Engine Room Main Wire and Engine Room J/B No 2 (Engine Compartment Left)2G22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2J22Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2K22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
EB136 (1MZ±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No 2)EB138 (5S±FE)Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
IG140Instrument Panel Wire and Cowl Wire (Lower Finish Panel)IG240Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EB36 (1MZ±FE)Left Radiator Side SupportEB38 (5S±FE)Left Radiator Side Support
IF40Left Kick Panel
IG40Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E336 (1MZ±FE)Cowl WireE338 (5S±FE)Cowl Wire

2 1
11
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1
231
23
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(Hint : See Page 7)GRAY
(TMMK Made) BROWN
C13GRAY
F4 (A) F6 (C)BLACK
BLACK BLACK
I17 J1BLACK
BLACK(Hint : See Page 7)
(Hint : See Page 7)
B2
C10 (C) D2
G2
H1 H2J2
J4C9 (B)C9 (B) A40BLACK(TMC Made)
(TMMK Made)
C10 (C)(TMC Made) BROWN
D6
ORANGE GRAYJ11
(Hint : See Page 7)
(Hint : See Page 7) (Hint : See Page 7)
J5 J7

HEADLIGHT (w/ DAYTIME RUNNING LIGHT)







DD




(Hint : See Page 7)
J27 (A)
1










FF
(Hint : See Page 7)
J28 (B) P3

MEMO

LIGHT AUTO TURN OFF
A 1C 1F1F2 E 37. 5A
DOME FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2J 12
1W 1 23 15
1C 6 1B 4
C 2
IG 1J 71J8
OFF
TAI L
HEAD
LIGHT
CONTROL SW
C 1C4
11S 7
16 A
6 10
AA A71 AB±G
B±R
B±RB
B±R
G± R G±R
R R±GR±Y W±BW±B
W±B
G
JUNCTION
CONNECTOR J11
JUNCTION
CONNECTOR J 7DOOR COURTESY SW
FRONT L H D12 JUNCTION
CONNECTOR J 2
COMBINATION SW C13 FUSIBLE LINK BLOCK
INTEGRATION RELAY B
TAILLIGHT
RELAY10A
GAU GE
BATTERY13 14
FL MA IN
3. 0L* 3 : TMC MADE
* 4 : TMMK MADE
100A
ALT
C F 4 A , F 6 F, F 9
I17 C * 1 : W/O DAYTIME RUNNING LIGHT
* 2 : W/ DAY TIME RUNNING LIGHT40A
MAIN
2 12B 3
32 41
2K 8
C 3B
B BB
H
R±BR
H±LP
R±B R±BR±B
JUNCTION
CONNECTOR J 1
HEAD
RELAY
JUNCTION
CONNECTOR J3 2
(
*1)
(
*2)
(
*2)
(
*2)
(
*1)B 19(
*4) A 6(
*3)
B 2(
*4) A 5(
*3)
B D 6 , A
DAYTIME RUNNING
LIGHT RELAY (
MAIN)
TA ILB 16
T
B 17
G± Y
G±R
(
*2 *4)
(
*2 *4)(
EXCEPT * 2 * 4)

With the ignition SW turned on, the current flows to TERMINAL 7 of the integration relay through GAUGE fuse.
Voltage is applied at all times to TERMINAL (C) 2 of the integration relay through the taillight relay coil side, and to
TERMINAL (C) 3 through the HEAD relay coil side (w/o daytime running light) or through the daytime running light relay
(Main) (w/ daytime running light).
1. NORMAL LIGHTING OPERATION

With the light control SW turned to TAIL position, a signal is input into TERMINAL (C) 1 of the integration relay. Due to this
signal, the current flowing to TERMINAL (C) 2 of the relay flows to TERMINAL (C) 1 to TERMINAL 14 of the light control SW
to TERMINAL 16 to GROUND, and taillight relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (C) 1 and (C) 4 of the integration relay.
Due to this signal, the current flowing to TERMINAL (C) 3 of the relay flows to TERMINAL (C) 4 to TERMINAL 13 of the light
control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes taillight and HEAD relay to turn the lights on.
The taillight circuit is same as above.
2. LIGHT AUTO TURN OFF OPERATION
With light on and ignition SW turned off (Input signal goes to TERMINAL 7 of the relay), when the driver's door is opened
(Input signal goes to TERMINAL 6 of the relay), the relay operates and the current is cut off which flows from TERMINAL (C)
2 of the relay to TERMINAL (C) 1 In taillight circuit and from TERMINAL (C) 3 to TERMINAL (C) 4 in headlight circuit.
As a result, all lights are turned off automatically.
HEAD RELAY [ENGINE ROOM J/B NO.2]
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake lever released (w/ daytime running light)
TAILLIGHT RELAY [INSTRUMENT PANEL J/B]
3±5 : Closed with the light control SW at TAIL or HEAD position
D12 DOOR COURTESY SW FRONT LH
1±GROUND : Continuity with the front LH door open
I17 (C)
INTEGRATION RELAY
7±GROUND : Approx. 12 volts with the ignition SW at ON position
6±GROUND : Continuity with the front LH door open
1±GROUND : Always approx. 12 volts
10±GROUND : Always continuity
(C) 2±GROUND : Always approx. 12 volts
(C) 3±GROUND : Always approx. 12 volts
(C) 4±GROUND : Continuity with the light control SW at HEAD position
(C) 1±GROUND : Continuity with the light control SW at TAIL or HEAD position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C1330F6C26 (1MZ±FE)J231
D6A30F6C28 (5S±FE)J731D6B30F9F26 (1MZ±FE)J1131
D1232F9F28 (5S±FE)J3231
F4A26 (1MZ±FE)I17C30F4A28 (5S±FE)J131
SYSTEM OUTLINE
SERVICE HINTS

LIGHT AUTO TURN OFF
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B
1C20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1J
()
1S20Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1W20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2B22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2J22Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2K22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
IG40Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E336 (1MZ±FE)Cowl WireE338 (5S±FE)Cowl Wire
111
121234



X


XXX X 1314 X
16
XX

X
XX 5 6


XX


X






B




BBBB



A A A








AAAAAA







AA
AAAA


B




BBB


C13(TMC Made) GRAYD6 (A)
D12 F4 (A) F6 (C)
ORANGEI17 (C) F9 (F)
J1
BLACK
(Hint : See Page 7)(Hint : See Page 7)J2GRAYJ11
(Hint : See Page 7)(Hint : See Page 7)
J7
GRAY
(Hint : See Page 7)J32
(TMMK Made)D6 (B)
19
X2


XXXX X
X X


17






16

MEMO