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LT-40
DAYTIME LIGHT SYSTEM
Revision: 2005 July 2005 FX
to BCM terminal 55,
through 10A fuse (No. 36, located in fuse, fusible link and relay box)
to daytime light relay terminals 2 and 5.
When ignition switch is in ON or START position, power is supplied
through 10A fuse [No. 14, located in fuse block (J/B)]
to combination meter terminal 7,
through 15A fuse [No. 1, located in fuse block (J/B)]
to BCM terminal 38.
Ground is supplied
to combination meter terminals 5, 6 and 15
through grounds M35, M45 and M85,
to BCM terminals 49 and 52
through grounds M35, M45 and M85.
DAYTIME LIGHT OPERATION
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is
supplied
through daytime light relay terminal 1
to combination meter terminal 10,
through daytime light relay terminal 3
to clearance lamp RH and LH terminal 1.
Ground is supplied
to combination meter terminals 5, 6 and 15
through grounds M35, M45 and M85,
to clearance lamp RH and LH terminal 3
through grounds E21, E50 and E51.
With power and grounds supplied, the daytime light lamps illuminate.
COMBINATION SWITCH READING FUNCTION
Refer to BCS-3, "COMBINATION SWITCH READING FUNCTION" .
AUTO LIGHT OPERATION
Refer to LT- 5 5 , "System Description" in “AUTO LIGHT SYSTEM”.
CAN Communication System DescriptionAKS007N1
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitAKS0080T
Refer to LAN-30, "CAN Communication Unit" .
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DAYTIME LIGHT SYSTEM LT-41
C
D E
F
G H
I
J
L
M A
B
LT
Revision: 2005 July 2005 FX
SchematicAKS007N3
TKWM2045E
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LT-42
DAYTIME LIGHT SYSTEM
Revision: 2005 July 2005 FX
Wiring Diagram — DTRL —AKS007N4
TKWM2046E
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DAYTIME LIGHT SYSTEM LT-43
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L
M A
B
LT
Revision: 2005 July 2005 FX
TKWM0816E
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LT-44
DAYTIME LIGHT SYSTEM
Revision: 2005 July 2005 FX
TKWM0609E
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DAYTIME LIGHT SYSTEM LT-45
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L
M A
B
LT
Revision: 2005 July 2005 FX
TKWM0610E
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LT-46
DAYTIME LIGHT SYSTEM
Revision: 2005 July 2005 FX
Terminals and Reference Values for BCMAKS00CHO
How to Proceed With Trouble DiagnosisAKS007N6
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to LT- 3 9 , "
System Description" .
3. Perform Preliminary Check. Refer to LT- 4 7 , "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does daytime light lamp operate normally? If YES, GO TO 6. If NO, GO TO 4.
6. INSPECTION END
Te r m i n a l No. Wire
color Signal name Measuring condition
Reference value
Ignition
switch Operation or condition
2 GY Combination switch input 5 ON Lighting, turn, wiper OFF
Wiper dial position 4
3 L/B Combination switch input 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
4 PU/W Combination switch input 3
5 Y/R Combination switch input 2
6 SB Combination switch input 1
32 GY/R Combination switch output 5 ON Lighting, turn, wiper OFF
Wiper dial position 4
33 G Combination switch output 4 ON Lighting, turn, wiper OFF
Wiper dial position 4
34 W/B Combination switch output 3
35 W/G Combination switch output 2
36 W/R Combination switch output 1
38 W/L Ignition switch (ON) ON — Battery voltage
39 L CAN − H—— —
40 R CAN − L—— —
42 L/R Battery power supply OFF — Battery voltage
49 B Ground ON — Approx. 0V
52 B Ground ON — Approx. 0V
55 G Battery power supply OFF — Battery voltage
PKIB3468E
PKIB3469E
PKIB3470E
PKIB3471E
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DAYTIME LIGHT SYSTEM LT-47
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Revision: 2005 July 2005 FX
Preliminary CheckAKS007N7
CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES
Check for blown fuses.
Refer to LT- 4 2 , "
Wiring Diagram — DTRL —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
3, "POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
Unit Power source Fuse and fusible link No.
BCM Battery
M
22
Ignition switch ON or START position 1
Daytime light relay Battery 36
Terminal Ignition switch position
(+) (-) OFF ON
Connec-
tor Terminal (Wire color)
M3 38 (W/L) Ground Approx. 0V Battery voltage
M4 42 (L/R) Battery voltage Battery voltage
55 (G) Battery voltage Battery voltage
PKIB5199E
Terminal Continuity
Connector Terminal (Wire color) Ground Yes
M4 49 (B)
52 (B)
PKIB3545E