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 |
Installation
INSTALLATION
PROCEDURE
1. INSTALL SEPARATE TYPE FRONT SEAT CUSHION COVER
(a) Using a tacker, install the separate type front seat cushion heater
to the end of the separate type front seat cushion cover with 25 new tack
pins.
NOTICE:
...
Ignition Switch
Components
COMPONENTS
ILLUSTRATION
Removal
REMOVAL
PROCEDURE
1. REMOVE LOWER STEERING COLUMN COVER
2. REMOVE UPPER STEERING COLUMN COVER
3. REMOVE IGNITION SWITCH
(a) Remove the 2 screws and ignition switch.
...
Initialization
INITIALIZATION
1. RESET BACK DOOR CLOSE POSITION
NOTICE:
Perform initialization of the power back door system (power back door ECU initialization)
if one of the following is performed:
The cable is disconnected from the negative (-) battery termin ...