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 BATTERY VOLTAGE |
(a) Measure the battery voltage with the engine switch off.
Standard voltage:
11 to 14 V (Engine switch off)
If the voltage is below 11 V, replace or recharge the 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 |
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| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING |
(a) Terminals of ECU
Click here
(b) Data List / Active Test
Click here
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| 7. | REPAIR OR REPLACE |
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| 8. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Customize Parameters
CUSTOMIZE PARAMETERS CUSTOMIZE HEATED STEERING WHEEL SYSTEM (a) Customizing with the Techstream. NOTICE:
When the customer requests a change in a function, first make sure that the function can be
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 pr
Terminals Of Ecu
TERMINALS OF ECU HEATED STEERING WHEEL CONTROLLER (STEERING VIBRATION ECU) (a) Measure the voltage or resistance according to the value(s) in the table below. HINT: Perform the inspection from the ha
SEE MORE:
Assist Map Number Un-Writing (C1581)
DESCRIPTION This DTC will be stored if the power steering ECU (rack and pinion power steering gear assembly) determines that the assist map is not written in the ECU. DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note C1581
Crankshaft Position Sensor "A" No Signal (P033531)
DESCRIPTION This DTC is output when a malfunction has occurred in the engine pulse signal system from the ECM. DTC No. Detection Item DTC Detection Condition Trouble Area P033531 Crankshaft Position Sensor "A" No Signal Stereo component equalizer assembly detects malfunction in engi
