Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: How To Proceed With Troubleshooting
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 engine switch was on (IG), whether the engine was started |
| How did it happen? | Problem symptoms |
|
| 3. | INSPECT BATTERY VOLTAGE |
(a) Measure the battery voltage.
Standard Voltage:
11 to 14 V
HINT:
- A simple method to determine whether the battery is depleted is to operate the horn.
- If the battery voltage is below 11 V, recharge or replace the battery.
(b) Check for blown fuses, open or shorted wire harnesses, improperly connected connectors and other problems in areas that can be visually inspected.
(c) Check the connection of each connector and check them for deformation or damage.
|
| 4. | PROBLEM SYMPTOMS TABLE |
HINT:
Click here .gif)
| Result | Proceed to |
|---|---|
| Fault is not listed in problem symptoms table | A |
| Fault is listed in problem symptoms table | B |
| B | .gif) | REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
| 5. | OVERALL ANALYSIS AND TROUBLESHOOTING |
(a) Operation check
Click here
(b) Terminals of ECU
Click here
(c) Inspection
|
| 6. | REPAIR OR REPLACE |
|
| 7. | CONFIRMATION TEST |
| NEXT | | END |
System Diagram
SYSTEM DIAGRAM ...
Operation Check
OPERATION CHECK 1. CHECK FOLD FUNCTION OPERATION (a) Operating Conditions. (1) All of the following conditions are met:
Initialization (initial position memorization) has been completed.
The back ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Power Mirror Control System (w/o Memory): System Description
SYSTEM DESCRIPTION POWER MIRROR CONTROL SYSTEM (w/o Memory) DESCRIPTION (a) This system has the following functions: electrical remote control mirror function, power retract mirror function, auto power retract mirror function, reverse shift-linked function, reverse shift-linked mirror position memor ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Wireless Door Lock Control System: Wireless Door Lock Tuner Circuit Malfunction (B1242)
DESCRIPTION The electrical key and tire pressure monitoring system receiver assembly is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assem ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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