TOYOTA RAV4 2006 Service Repair Manual

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)

LIGHTING – LIGHTING SYSTEMLI–45
LI
(a) Disconnect the E15 main body ECU connector.
(b) Disconnect the E12 headlight dimmer switch connector.
(c) Disconnect the IJ instrument panel junction block
connector.
(d) Measure the resistance of the wire harness side
connectors.
Standard resistance
NG
OK
10CHECK WIRE HARNESS (MAIN BODY ECU - DIMMER SWITCH)
B118220E01
Tester Connection Specified Condition
E15-22 (HF) - E12-17 (HF) Below 1
E15-22 (HF) or E12-17 (HF) - Body
ground10 k or higher
IJ-4 (HU) - E12-11 (HU) Below 1
IJ-4 (HU) or E12-11 (HU) - Body
ground10 k or higher
REPAIR OR REPLACE HARNESS AND
CONNECTOR

LI–46LIGHTING – LIGHTING SYSTEM
LI
(a) Remove the headlight dimmer switch.
(b) Measure the resistance of the switch.
Standard resistance
NG
OK
11INSPECT HEADLIGHT DIMMER SWITCH
E068152E10
Tester Connection Condition Specified Condition
11 (HU) - 12 (EL) Dimmer switch HIGH Below 1
17 (HF) - 12 (EL) Dimmer switch FLASH Below 1
REPLACE HEADLIGHT DIMMER SWITCH
ASSEMBLY
REPAIR OR REPLACE HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - BODY
GROUND)

LIGHTING – LIGHTING SYSTEMLI–47
LI
DESCRIPTION
The main body ECU controls the front fog light relay (Marking: FR FOG) when a signal is received from
the headlight dimmer switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
Front Fog Light Circuit
1PERFORM ACTIVE TEST BY INTELLIGENT TESTER
B118206E03

LI–48LIGHTING – LIGHTING SYSTEM
LI
(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:
Front fog light comes on.
OK
NG
(a) Check that the taillight comes on when the light control
switch is on (TAIL).
OK:
Taillight comes on.
NG
OK
(a) Remove the FR FOG fuse from the instrument panel
junction block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1
NG
OK
(a) Remove the fog light bulb.
(b) Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1, then check that
the bulb illuminates.
OK:
Bulb illuminates.
NG
OK
Item Test Details Diagnostic Note
F FOG LIGHT RLY Turn front fog light relay: ON / OFF -
Go to step 9
2CHECK TAILLIGHT
GO TO TAILLIGHT RELAY CIRCUIT
3INSPECT FUSE (FR FOG)
REPLACE FUSE
4INSPECT FOG LIGHT BULB
B128063E02
REPLACE FOG LIGHT BULB

LIGHTING – LIGHTING SYSTEMLI–49
LI
(a) Remove the front fog light relay from the No. 6 relay
block.
(b) Measure the resistance of the relay.
Standard resistance
NG
OK
(a) Disconnect the E17 ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
(a) Remove the front fog light relay from the No. 6 relay
block.
(b) Measure the voltage of the relay block.
standard voltage
NG
OK
5INSPECT FRONT FOG LIGHT RELAY (Marking: FR FOG)
B060778E78
Tester Connection Specified Condition
3 - 5 10 k
or higher
3 - 5 Below 1
(Battery voltage applied to terminals
1 and 2)
REPLACE FRONT FOG LIGHT RELAY
6CHECK WIRE HARNESS (BATTERY - MAIN BODY ECU)
B129968E03
Tester Connection Condition Specified Condition
E17-17 (FFGO) - Body
groundLight control switch on
(TAIL)10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR
7CHECK WIRE HARNESS (FRONT FOG LIGHT RELAY - BATTERY)
B128064E04
Tester Connection Specified Condition
No. 6 relay block front fog light relay
terminal 5 - Body ground10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR