Lexus ES: Diagnosis System
DIAGNOSIS SYSTEM
DESCRIPTION
(a) Blind spot monitor data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
CHECK DLC3
(a) Check the DLC3.
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DIAGNOSIS FUNCTION
(a) The blind spot monitor system displays an error message on the multi-information display to inform the driver that the system is unavailable either temporarily or due to a malfunction.
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When the system is unavailable temporarily:
Multi-information display displays "Blind Spot Monitor Unavailable".
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When the system is unavailable due to a malfunction:
Multi-information display displays "Blind Spot Monitor Malfunction Visit Your Dealer".
ABNORMALITY HISTORY
HINT:
The abnormality history for a blind spot monitor sensor can be displayed or cleared.
(a) Check abnormality history
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Turn the blind spot monitor system on.
(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History.
Body Electrical > Blind Spot Monitor Master > Utility| Tester Display |
|---|
| BSM Master Abnormal History |
| Tester Display |
|---|
| BSM Slave Abnormal History |
(6) Check the results displayed for the abnormality history check.
HINT:
- If "Yes" is displayed, check the suspected area column for each item.
- Abnormality history is stored only for the blind spot monitor sensor for which an abnormality has been detected.
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If "No" is displayed, refer to Problem Symptoms Table.
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| Tester Display | Item Explanation | Suspected Area |
|---|---|---|
| History of Module Blockage | History of blind spot monitor sensor detection problems due to snow, rain, etc. on the bumper |
|
| History of Low Voltage | History of low supply auxiliary battery voltage from auxiliary battery to the blind spot monitor sensor | Power Source Circuit Click here |
| History of High Voltage | History of high supply auxiliary battery voltage from auxiliary battery to the blind spot monitor sensor | |
| History of Low Temperature | History of low temperature for the blind spot monitor sensor |
|
| History of High Temperature | History of high temperature for the blind spot monitor sensor |
(b) Clearing abnormality history
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Turn the blind spot monitor system on.
(5) Enter the following menus: Body Electrical / Blind Spot Monitor Master or Blind Spot Monitor Slave / Utility / BSM Master Abnormal History or BSM Slave Abnormal History.
Body Electrical > Blind Spot Monitor Master > Utility| Tester Display |
|---|
| BSM Master Abnormal History |
| Tester Display |
|---|
| BSM Slave Abnormal History |
(6) Clear the abnormality history.
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Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Blind Spot Monitor System DTC No. Detection Item Link C1A45 Vehicle Speed Sensor C1A45 Vehicle Speed Sensor C1A46 Yaw Rate Sensor
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the blind spot monitor system on. (d) Turn the Techstream on. (e) Enter the following me
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever DTCs are detected, the blind spot monitor sensor stores the current vehicle (sensor) state as freeze frame data. CHECK FREEZE FRAME DATA (a) Connect th
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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 symptom by checking the suspect
