DESCRIPTION
The headlight leveling ECU assembly receives the vehicle speed signal from the combination meter assembly.
HINT:
WIRING DIAGRAM
1. for 2GR-FE
2. for 1AR-FE
PROCEDURE
1. |
CHECK COMBINATION METER SYSTEM |
(a) The circuits that send vehicle speed signals to this system are inspected
in the meter section (See page ).
(b) During inspection for the meter system, if there is an instruction that indicates to go back to inspections for the lighting system, proceed to the next step.
|
2. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - COMBINATION METER ASSEMBLY) |
(a) Disconnect the E1 combination meter assembly connector. |
|
(b) Disconnect the A40 headlight leveling ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A40-16 (SPDR) - E1-16 (+S) |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Combination Meter Assembly) |
*2 |
Front view of wire harness connector (to Headlight Leveling ECU Assembly) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (WIPER RELAY - COMBINATION METER) |
|
3. |
INSPECT COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM) |
(a) Check the output waveform. (1) Remove the combination meter assembly with the connector still connected. (2) Connect an oscilloscope to terminal E1-16 (+S) and body ground. (3) Turn the ignition switch to ON. (4) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is displayed as shown in the illustration. Text in Illustration
HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows. |
|
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPLACE COMBINATION METER ASSEMBLY |
System Description
SYSTEM DESCRIPTION
1. GENERAL
This system has the following functions: manual slide open and close; auto slide
open; manual tilt up and down; auto tilt up; jam protection; key off operation.
2. FUNCTION OF MAIN COMPONENT
Component
O ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY (for 6 Speakers)
(a) With the speaker installed, check that there is no looseness or other abnormalities.
(b) Check that there is no foreign matter in the speaker, no tears on the speaker
cone ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
Main body ECU (Driver side junction block assembly)
Power back door ECU (Power back door motor unit)
...