Toyota RAV4 Service Manual: Headlight (hi-beam) circuit
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
Inspection procedure
- Perform active test by intelligent tester
- Connect the intelligent tester (with can vim) to the
dlc3.
- Turn the ignition switch to the on position and press the
intelligent tester main switch on.
- Select the item below in the active test and then
check the relay operation.
Ok:
headlight (high) comes on.
- Check headlight (low)
- Check that the headlight (low) comes on when the light
control switch is on (head).
Ok:
headlight (low) comes on.
- Inspect fuse (head lh, head rh)
- Remove the head lh fuse and head rh fuse from the
engine room no. 2 Relay block.
- Measure the resistance of the fuses.
Standard resistance:
below 1
- Inspect daytime running light relay (marking: drl no. 2, Drl no. 3,
Drl no. 4)
- Remove the no. 2 Relay, no. 3 Relay and no. 4 Relay from
the engine room no. 2 Relay block.
- Measure the resistance of the relays.
Standard resistance:
No. 2, No. 4
No. 3
- Inspect headlight bulb (high)
- Remove the headlight bulb (high).
- Connect the positive (+) lead from the battery to terminal
2 and the negative (-) lead to terminal 1, then check that
the bulb illuminates.
- Check wire harness (main body ecu - battery)
- Disconnect the e16 main body ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
- Check wire harness (main body ecu)
- Remove the headlight relay from the engine room no. 2
Relay block.
- Disconnect the e15 main body ecu connector.
- Measure the voltage of the wire harness side connector.
Standard voltage
- Check wire harness (headlight relay - no. 3 Daytime running light
relay and body ground)
- Remove the no. 3 Daytime running light relay from the
engine room no. 2 Relay block.
- Measure the voltage and resistance of the relay block.
Standard voltage
Standard resistance
- Check wire harness (battery - no. 2 Daytime running light relay, bulb
and body ground)
- Remove the no. 2 Daytime running light relay from the
engine room no. 2 Relay block.
- Remove the a14 and a22 headlight bulb connectors.
- Measure the voltage and resistance of the relay block.
Standard voltage
Standard resistance
Replace instrument panel junction block (main body ecu)
- Check wire harness (main body ecu - dimmer switch)
- Disconnect the e15 main body ecu connector.
- Disconnect the e12 headlight dimmer switch connector.
- Disconnect the ij instrument panel junction block
connector.
- Measure the resistance of the wire harness side
connectors.
Standard resistance
- Inspect headlight dimmer switch
- Remove the headlight dimmer switch.
- Measure the resistance of the switch.
Standard resistance
Repair or replace harness and connector (headlight dimmer switch - body
ground)
Description
The main body ecu controls the daytime running light no. 2 Relay (marking:
drl no.2).
Wiring diagram
Inspection procedure
Inspect daytime running light relay (marking: drl no. ...
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
Perform ...
Other materials:
Blower motor circuit
Description
The blower motor is operated by signals from the air conditioning amplifier.
Blower motor speed signals
are transmitted in accordance with changes in the duty ratio.
Wiring diagram
Inspection procedure
Perform active test by intelligent tester (blower motor)
Conne ...
Short to gnd in can bus line
(2005/11-2006/01)
Description
There may be a short circuit between the can bus line and gnd when there is
resistance between
terminals 6 (canh) and 4 (cg) or terminals 14 (canl) and 4 (cg) of the dlc3.
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off b ...
Dtc check / clear
Check dtc
Dtcs which are stored in the ecm can be displayed
with the intelligent tester.
The intelligent tester can display pending dtcs and
current dtcs. Some dtcs are not stored unless a
malfunction is detected in consecutive driving
cycles. When a malfunction is detected ...