Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
*: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
|
| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Interview the customer and confirm the problem.
Click here .gif)
|
| 3. | CHECK DTC AND FREEZE FRAME DATA* |
(a) Check and record DTCs and Freeze Frame Data.
for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
(b) Clear the DTCs and Freeze Frame Data.
for DTC Check / Clear: Click here
for Freeze Frame Data: Click here
(c) Reconfirm the DTCs.
(1) Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data.
Chassis > ABS/VSC/TRAC > Trouble CodesHINT:
-
When CAN communication system DTCs are output, repair the CAN communication system first.
Click here
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If DTCs U0123, U0124, U0126, and/or U0293 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit.
Click here
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If the Techstream cannot communicate with the skid control ECU (brake booster with master cylinder assembly), inspect the CAN communication system.
Click here
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If there is no response from the skid control ECU (brake booster with master cylinder assembly), inspect the IG1 circuit of the skid control ECU (brake booster with master cylinder assembly).
Click here
| Result | Proceed to |
|---|---|
| DTCs are output. | A |
| DTCs are not output. (Problem symptom does not occur.) | B |
| DTCs are not output. (Problem symptom occurs.) | C |
| B |  | GO TO STEP 5 |
| C | | GO TO STEP 6 |
|
| 4. | DIAGNOSTIC TROUBLE CODE CHART |
(a) Proceed to Diagnostic Trouble Code Chart.
Click here
| NEXT | | GO TO STEP 7 |
| 5. | SYMPTOM SIMULATION |
(a) Proceed to How to Proceed with Troubleshooting.
Click here
|
| 6. | PROBLEM SYMPTOMS TABLE |
(a) Proceed to Problem Symptoms Table.
Click here
|
| 7. | CIRCUIT INSPECTION* |
|
| 8. | IDENTIFICATION OF PROBLEM |
|
| 9. | REPAIR OR REPLACEMENT |
|
| 10. | CONFIRMATION TEST* |
| NEXT | | END |
READ NEXT:
Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS CHECK FOR INTERMITTENT PROBLEMS HINT: A momentary interruption (open circuit) in the connectors and/or wire harnesses between the sensors and ECUs can be detected using
Initialization
INITIALIZATION DESCRIPTION (a) Perform initialization and calibration of the linear solenoid valve when the brake booster with master cylinder assembly, brake pedal stroke sensor assembly or brake ped
Calibration
CALIBRATION DESCRIPTION (a) After replacing any VSC related components or performing wheel alignment adjustment, clear and read the sensor calibration data. Refer to the table below and then perform t
SEE MORE:
GVIF Disconnected (from EMV/MM Integrated Device to Multi Display) (B1575)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area B1575 GVIF Disconnected (from EMV/MM Integrated Device to Multi Display) GVIF disconnected (from radio receiver assembly to multi-display assembly)
Harness or connector (GVIF cable)
Multi-display assembly
Front Occupant Classification Sensor LH Collision Detection (B1785)
DESCRIPTION DTC B1785 is stored when the occupant detection ECU receives a collision detection signal, which is sent by the front occupant classification sensor LH when an accident occurs. DTC B1785 is also stored when the front seat adjuster assembly RH is subjected to a strong impact, even if an a
