Toyota CH-R Service Manual: High Beam Headlight Circuit

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / High Beam Headlight Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the high beam headlights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuse for circuits related to this system before performing the following procedure.
Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table.
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Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1
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- *1: w/ Smart Key System

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM (HEAD LIGHT HI)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Check that the high beam headlights illuminate.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Head Light Hi	High beam headlights	ON or OFF	-

Body Electrical > Main Body > Active Test

Tester Display
Head Light Hi

OK:

The high beam headlights illuminate.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	INSPECT H-LP SHADE RELAY

(a) Remove the H-LP SHADE relay from the No. 1 engine room relay block.

(b) Inspect the H-LP SHADE relay.

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REPLACE H-LP SHADE RELAY

3.	CHECK HARNESS AND CONNECTOR (H-LP SHADE RELAY - BATTERY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Relay terminal 2- Body ground	Always	11 to 14 V
Relay terminal 5- Body ground	Always	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (H-LP SHADE RELAY - HEADLIGHT ASSEMBLY LH AND HEADLIGHT ASSEMBLY RH AND BODY GROUND)

(a) Disconnect the A11 headlight assembly LH connector.

(b) Disconnect the A29 headlight assembly RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Relay terminal 3 - A11-3 (SOL)	Always	Below 1 Ω
Relay terminal 3 - A29-3 (SOL)	Always	Below 1 Ω
A11-6 (E) - Body ground	Always	Below 1 Ω
A29-6 (E) - Body ground	Always	Below 1 Ω
Relay terminal 3 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (H-LP SHADE RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the F15 main body ECU (Multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Relay terminal 1 - F15-1 (DIM)	Always	Below 1 Ω
Relay terminal 1- Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Low Beam Headlight Circuit

DESCRIPTION The main body ECU (multiplex network body ECU) controls the low beam headlights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses and bulbs for circuits rela ...

Manual Headlight Beam Level Control System

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