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 |
Indicator Circuit
Inner Rear View Mirror Power Source CircuitCharge Warning Light Comes ON while Driving
PROCEDURE
1.
CHECK LOCK FUNCTION OF CLUTCH PULLEY
(a) Check the lock function with the pulley installed in the vehicle.
(1) Visually check that the rotor in the generator operates with the engine started.
(b) Check the lock ...
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedures to troubleshoot the power back door system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Open in Stop Light Switch Circuit (C1249/49)
DESCRIPTION
The skid control ECU (housed in the actuator assembly) inputs the stop light
switch signal and the condition of brake operation.
The skid control ECU has an open detection circuit, which outputs this DTC when
detecting an open in the stop lig ...