Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedures to troubleshoot the rear power seat control system.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
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| 2. | CUSTOMER PROBLEM ANALYSIS |
HINT:
- In troubleshooting, confirm 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 problem analysis:
| What | Vehicle model, system name |
| When | Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time |
| Where | Whether the problem occurs at a specific location |
| Under what conditions? | Whether the doors were locked or unlocked, whether the power switch was on (IG), whether the hybrid control system has started |
| How did it happen? | Problem symptoms |
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| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
Standard voltage:
11 to 14 V (power switch off)
If the auxiliary voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
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| 4. | PROBLEM SYMPTOMS TABLE |
(a) Refer to Problem Symptoms Table.
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| Result | Proceed to |
|---|---|
| Fault is not listed in problem symptoms table | A |
| Fault is listed in problem symptoms table | B |
| B | .gif) | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
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| 5. | OVERALL ANALYSIS AND TROUBLESHOOTING |
(a) Operation check
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(b) Terminals of ECU
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(c) Inspection
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| 6. | ADJUST, REPAIR OR REPLACE |
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| 7. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK BASIC FUNCTION (a) Operate the rear power seat switch, No. 1 fold seat switch assembly and No. 2 fold seat switch assembly and check that each switch function operates normally.
Initialization
INITIALIZATION INITIALIZE (INITIAL POSITION MEMORIZATION) NOTICE: Perform initialization (initial position memorization) in the following situations.
When replacing the fold seat control ECU with a
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
SEE MORE:
Brake Warning Light Remains ON
DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication. If any of the following is detected, the brake warning light / red (malfunction) remains on:
The skid control ECU (brake booster with master cylinde
Terminals Of Ecu
TERMINALS OF ECU TERMINALS OF ECU *a Component without harness connected (Skid Control ECU (Brake Booster with Master Cylinder Assembly)) - - Terminal No. (Symbol) Terminal Description 1 (MRI1) Motor power supply input 1 2 (MRI2) Motor power supply input 2 3 (STPO)
