Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
-
The back door closer system troubleshooting procedure is based on the premise that the power back door system is operating normally. Check the power back door system first before troubleshooting the back door closer system.
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- Use the following procedure to troubleshoot the back door closer system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
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| 2. | INSPECT AUXILIARY BATTERY |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
HINT:
- A simple method to determine whether the auxiliary battery is discharged is to operate the horn.
- If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.
(b) Check the fuses and relays.
(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.
|
| 3. | CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the CAN communication system is functioning normally.
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| Result | Proceed to |
|---|---|
| CAN DTC is not output | A |
| CAN DTC is output | B |
| B | .gif) | GO TO CAN COMMUNICATION SYSTEM |
|
| 4. | CHECK FOR DTC* |
(a) Check for DTCs.
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(b) Clear the DTCs.
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(c) Recheck for DTCs.
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| Result | Proceed to |
|---|---|
| DTC is not output | A |
| DTC is output | B |
| B | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
| 5. | 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 | | ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE |
|
| 6. | OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Operation Check
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(b) Terminals of ECU
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(c) Data List / Active Test
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|
| 7. | ADJUST, REPAIR OR REPLACE |
|
| 8. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Operation Check
OPERATION CHECK CHECK BASIC FUNCTIONS (a) When the back door is partially closed, check that the motor operates to fully close (lock) the back door. (b) Check that the back door can be opened. (c) Whe
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
Terminals Of Ecu
TERMINALS OF ECU CHECK MULTIPLEX NETWORK DOOR ECU (a) Disconnect the Y26 and Y27 multiplex network door ECU connectors. (b) Measure the voltage and resistance according to the value(s) in the table b
SEE MORE:
System Diagram
SYSTEM DIAGRAM
STSW Monitor Malfunction (B2275)
DESCRIPTION This DTC is stored when a malfunction is detected in the starter circuit inside the certification ECU (smart key ECU assembly). DTC No. Detection Item DTC Detection Condition Trouble Area Note B2275 STSW Monitor Malfunction Certification ECU (smart key ECU assembly) in
