Lexus ES: Cruise Main Indicator Light Circuit
DESCRIPTION
When the dynamic radar cruise control system is turned on using the cruise control main switch, the cruise control indicator (vehicle-to-vehicle distance control mode) illuminates. The hybrid vehicle control ECU uses this and other indicators to indicate the status (presence or absence of a preceding vehicle, vehicle-to-vehicle distance, malfunction of system or related systems) of the dynamic radar cruise control system.
CAUTION / NOTICE / HINT
NOTICE:
-
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here
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- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
| 1. | PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Combination Meter > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Multi Display All (White) | Multi-information display (White display) | ON | - |
| Tester Display |
|---|
| Multi Display All (White) |
| Result | Proceed to |
|---|---|
| The multi-information display in the combination meter assembly turns on according to the operation of the Active Test. | A |
| The multi-information display in the combination meter assembly does not turn on according to the operation of the Active Test. | B |
| B | .gif) | GO TO METER / GAUGE SYSTEM |
|
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| 2. | READ VALUE USING TECHSTREAM |
(a) Enter the following menus: Powertrain / Radar Cruise 1 / Data List.
(b) Read the Data List according to the display on the Techstream.
Powertrain > Radar Cruise1 > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Cruise Indicator | Cruise control indicator status | ON or OFF | ON: Cruise control indicator illuminates OFF: Cruise control indicator turns off | - |
| Tester Display |
|---|
| Cruise Indicator |
| Result | Proceed to |
|---|---|
| The cruise control indicator illuminates and turns off according to the operation of the cruise control main switch. | A |
| The cruise control indicator does not illuminate but the Data List items change according to the operation of the cruise control main switch. | B |
| The cruise control indicator does not illuminate and the Data List items do not change according to the operation of the cruise control main switch. | C |
| A | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| B | | REPLACE COMBINATION METER ASSEMBLY |
| C | | REPLACE HYBRID VEHICLE CONTROL ECU |
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