Lexus ES: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use these procedures to troubleshoot the heated steering wheel system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V (Power switch off)
If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.
|
| 3. | CHECK CAN COMMUNICATION SYSTEM* |
(a) Using the Techstream, check if the CAN communication system is functioning normally.
HINT:
Refer to CAN Bus Check in CAN Communication System.
Click here .gif)
OK:
CAN communication system is functioning normally.
| NG | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 4. | CHECK FOR FOR DTCs AND MAKE A NOTE (HEATED STEERING WHEEL SYSTEM)* |
HINT:
Refer to DTC Check / Clear.
Click here
(a) Check for DTCs and note any codes that are output.
Body Electrical > Air Conditioner > Trouble Codes(b) Clear the DTCs.
Body Electrical > Air Conditioner > Clear DTCs(c) Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.
Body Electrical > Air Conditioner > Trouble Codes| Result | Proceed to |
|---|---|
| Malfunction is duplicated but DTCs are not output | A |
| Malfunction cannot be duplicated and DTCs are not output | B |
| DTCs are output | C |
| B | | GO TO SYMPTOM SIMULATION |
| C | | GO TO DTC CHART |
|
| 5. | PROBLEM SYMPTOMS TABLE |
HINT:
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 |
| B | | GO TO STEP 7 |
|
| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
|
| 7. | REPAIR OR REPLACE |
|
| 8. | CONFIRMATION TEST |
| NEXT | | END |
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