DESCRIPTION
The main body ECU (multiplex network body ECU) controls the high beam headlights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (HEAD LIGHT HI) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream 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 |
- |
Tester Display |
---|
Head Light Hi |
OK:
The high beam headlights illuminate.
OK |
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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NG |
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 |
NG |
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.
(c) Measure the resistance according to the value(s) in the table below.
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 |
NG |
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 |
OK |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
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