Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the telematics system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, check that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
- Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
-
The following 5 items are important points for analysis:
What
Vehicle model, system name
When
Date, time, occurrence frequency
Where
Road conditions
Under what conditions?
Driving conditions, weather conditions
How did it happen?
Problem symptoms
|
| 3. | INSPECT AUXILIARY BATTERY |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
HINT:
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
|
| 4. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Check if CAN communication system DTCs are output.
Click here .gif)
| Result | Proceed to |
|---|---|
| CAN DTCs are not output. | A |
| CAN DTCs are output. | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 5. | CHECK DTC* |
(a) Check for DTCs.
Safety connect system: Click here
Telematics system: Click here
| Result | Proceed to |
|---|---|
| DTCs are not output. | A |
| Safety connect system DTCs are output. | B |
| Telematics system DTCs are output. | C |
| B | | GO TO SAFETY CONNECT SYSTEM |
| C | | GO TO TELEMATICS SYSTEM |
|
| 6. | CHECK VEHICLE OPERATION HISTORY* |
(a) Check for vehicle control history and note any codes that are output.
Click here
| Result | Proceed to |
|---|---|
| No vehicle control history is output | A |
| Any vehicle control history is output | B |
| B | | GO TO VEHICLE CONTROL HISTORY |
|
| 7. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
Click here
| Result | Proceed to |
|---|---|
| Fault is not listed in Problem Symptoms Table. | A |
| Fault is listed in Problem Symptoms Table. | B |
HINT:
If the symptom does not recur and no DTCs are output, perform the simulation method.
Click here
| B | | GO TO STEP 9 |
|
| 8. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
|
| 9. | REPAIR OR REPLACE |
|
| 10. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK DCM OPERATION HISTORY HINT:
This function shows the telematics network status when the DCM (telematics transceiver) was operated. Use this when no DTC is present but this telematics
Parts Location
PARTS LOCATION ILLUSTRATION *1 ROOF ANTENNA ASSEMBLY - GPS - Telephone Main *2 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) *3 NAVIGATION ANTENNA ASSEMBLY - Telephone Sub *4 MAIN BOD
Precaution
PRECAUTION NOTICE: When disconnecting the cable from the negative (-) auxiliary battery terminal, initialize the following systems after the terminal is reconnected. System Name See Procedure
SEE MORE:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Power Mirror Control System (w/ Memory) DTC No. Detection Item Link U0142 Lost Communication with Main Body ECU
Removal
REMOVAL PROCEDURE 1. PRECAUTION (for HV Model) NOTICE:
When replacing the radio receiver assembly or navigation ECU, always replace it with a new one. If a radio receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
A communication malfunc
