relay TOYOTA RAV4 2006 Service Manual PDF

LIGHTING – LIGHTING SYSTEMLI–35
LI
DESCRIPTION
The main body ECU controls the daytime running light No. 2 relay (Marking: DRL NO.2).
WIRING DIAGRAM
DRL Relay Circuit
B118198E03

LI–36LIGHTING – LIGHTING SYSTEM
LI
INSPECTION PROCEDURE
(a) Remove the No. 2 relay, No. 3 relay and No. 4 relay from
the engine room No. 2 relay block.
(b) Measure the resistance of the relays.
Standard resistance:
No. 2, No. 4
No. 3
NG
OK
(a) Remove the HEAD LH fuse from the engine room No. 2
relay block.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1
NG
OK
1INSPECT DAYTIME RUNNING LIGHT RELAY (Marking: DRL NO. 2, DRL NO. 3, DRL NO. 4)
B128080E04
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5 Below 1
(Battery voltage applied to terminals
1 and 2)
Tester Connection Specified Condition
4 - 5 Below 1
4 - 5 10 k or higher
(Battery voltage applied to terminals
1 and 2)
3 - 5 10 k
or higher
3 - 5 Below 1
(Battery voltage applied to terminals
1 and 2)
REPLACE DAYTIME RUNNING LIGHT RELAY
2INSPECT FUSE (HEAD LH)
REPLACE FUSE

LIGHTING – LIGHTING SYSTEMLI–37
LI
(a) Remove the headlight bulb (high).
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1, then check that
the bulb illuminates.
NG
OK
(a) Remove the No. 2 daytime running light relay from the
engine room No. 2 relay block.
(b) Measure the voltage of the relay block.
Standard voltage
NG
OK
3INSPECT HEADLIGHT BULB (HIGH)
C128857E01
REPLACE HEADLIGHT BULB (HIGH)
4CHECK WIRE HARNESS (BATTERY - NO. 2 DAYTIME RUNNING LIGHT RELAY)
B118199E04
Tester Connection Specified Condition
Relay block daytime running light
No. 2 relay terminal 5 - Body ground10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR

LI–38LIGHTING – LIGHTING SYSTEM
LI
(a) Remove the No. 2 daytime running light relay from the
engine room No. 2 relay block.
(b) Disconnect the A14 and A22 headlight (HIGH)
connectors.
(c) Measure the resistance of the wire harness side
connectors and relay block.
Standard resistance
NG
OK
(a) Disconnect the E16 main body ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
5CHECK WIRE HARNESS (NO. 2 DAYTIME RUNNING LIGHT RELAY - HEADLIGHT BULB
AND BODY GROUND)
B118200E09
Tester Connection Specified Condition
Relay block daytime running light
No. 2 relay terminal 3 - A14-2Below 1
A14-2 - Body ground 10 k or higher
A14-1 - A22-1 Below 1
A14-1 - Body ground 10 k or higher
A22-2 - Body ground Below 1
REPAIR OR REPLACE HARNESS AND
CONNECTOR
6CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)
B118235E01
Tester Connection Specified Condition
E16-3 (DIM) - Body ground 10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR
REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)

LIGHTING – LIGHTING SYSTEMLI–39
LI
DESCRIPTION
The body ECU controls the headlight relay, No. 2 daytime running light relay (Marking: DRL NO. 2) and
No. 4 daytime running light relay (Marking: DRL NO. 4).
WIRING DIAGRAM
Headlight (HI-BEAM) Circuit
B118202E02

LI–40LIGHTING – LIGHTING SYSTEM
LI
INSPECTION PROCEDURE
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch to the ON position and press the
intelligent tester main switch ON.
(c) Select the item below in the ACTIVE TEST and then
check the relay operation.
Main body ECU
OK:
Headlight (HIGH) comes on.
OK
1PERFORM ACTIVE TEST BY INTELLIGENT TESTER
B118203E03
Item Test Details Diagnostic Note
HEADLIGHT HI Turn headlight dimmer relay (Headlight
dimmer switch HI position): ON / OFF-
Go to step 10

LIGHTING – LIGHTING SYSTEMLI–41
LI
NG
(a) Check that the headlight (LOW) comes on when the light
control switch is on (HEAD).
OK:
Headlight (LOW) comes on.
NG
OK
(a) Remove the HEAD LH fuse and HEAD RH fuse from the
engine room No. 2 relay block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1
NG
OK
(a) Remove the No. 2 relay, No. 3 relay and No. 4 relay from
the engine room No. 2 relay block.
(b) Measure the resistance of the relays.
Standard resistance:
No. 2, No. 4
No. 3
NG
OK
2CHECK HEADLIGHT (LOW)
GO TO HEADLIGHT RELAY CIRCUIT
3INSPECT FUSE (HEAD LH, HEAD RH)
REPLACE FUSE
4INSPECT DAYTIME RUNNING LIGHT RELAY (Marking: DRL NO. 2, DRL NO. 3, DRL NO. 4)
B128080E04
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5 Below 1
(Battery voltage applied to terminals
1 and 2)
Tester Connection Specified Condition
4 - 5 Below 1
4 - 5 10 k or higher
(Battery voltage applied to terminals
1 and 2)
3 - 5 10 k
or higher
3 - 5 Below 1
(Battery voltage applied to terminals
1 and 2)
REPLACE DAYTIME RUNNING LIGHT RELAY

LI–42LIGHTING – LIGHTING SYSTEM
LI
(a) Remove the headlight bulb (HIGH).
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1, then check that
the bulb illuminates.
NG
OK
(a) Disconnect the E16 main body ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
(a) Remove the headlight relay from the engine room No. 2
relay block.
(b) Disconnect the E15 main body ECU connector.
(c) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
5INSPECT HEADLIGHT BULB (HIGH)
C128857E01
REPLACE HEADLIGHT BULB (HIGH)
6CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)
B118235E01
Tester Connection Specified Condition
E16-3 (DIM) - Body ground 10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR
7CHECK WIRE HARNESS (MAIN BODY ECU)
E114538E17
Tester Connection Specified Condition
E15-20 (HRLY) - Body ground 10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR

LIGHTING – LIGHTING SYSTEMLI–43
LI
(a) Remove the No. 3 daytime running light relay from the
engine room No. 2 relay block.
(b) Measure the voltage and resistance of the relay block.
Standard voltage
Standard resistance
NG
OK
8CHECK WIRE HARNESS (HEADLIGHT RELAY - NO. 3 DAYTIME RUNNING LIGHT RELAY
AND BODY GROUND)
B118205E04
Tester Connection Condition Specified Condition
Relay block No. 3
daytime running light
relay terminal 1 - Body
groundLight control switch ON
(HEAD)
Dimmer switch position
LOW10 to 14 V
Tester Connection Specified Condition
Relay block No. 3 daytime running
light relay terminal 2 - Body groundBelow 1
REPAIR OR REPLACE HARNESS AND
CONNECTOR

LI–44LIGHTING – LIGHTING SYSTEM
LI
(a) Remove the No. 2 daytime running light relay from the
engine room No. 2 relay block.
(b) Remove the A14 and A22 headlight bulb connectors.
(c) Measure the voltage and resistance of the relay block.
Standard voltage
Standard resistance
NG
OK
9CHECK WIRE HARNESS (BATTERY - NO. 2 DAYTIME RUNNING LIGHT RELAY, BULB
AND BODY GROUND)
B118200E10
Tester Connection Specified Condition
Relay block No. 2 daytime running
light relay terminal 5 - Body ground10 to 14 V
Tester Connection Condition Specified Condition
Relay block No. 2
daytime running light
relay terminal 3 - A14-2Always Below 1
Relay block No. 2
daytime running light
relay terminal 3 - Body
groundAlways 10 k or higher
A14-1 - A22-1 Always Below 1
A14-1 or A22-1 - Body
groundAlways 10 k or higher
A22-2 - Body ground Always Below 1
Relay block No. 2
daytime running light
relay terminal 3 - A22-2Light control switch ON
(HEAD)
Dimmer switch position
LOWBelow 1
Relay block No. 2
daytime running light
relay terminal 3 - Body
groundLight control switch ON
(HEAD)
Dimmer switch position
LOW10 k or higher
A22-1 - Body ground Light control switch ON
(HEAD)
Dimmer switch position
LOWBelow 1
REPAIR OR REPLACE HARNESS AND
CONNECTOR
REPLACE INSTRUMENT PANEL JUNCTION BLOCK (MAIN BODY ECU)