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 ECM 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 ECM, 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 engine 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 ECM |
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Diagnosis System
DIAGNOSIS SYSTEM DESCRIPTION When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle's ECM (Engine Control Module) can be then read. OBD II regulations re
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.
Check each system by checking the suspec
