Lexus NX: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the occupant classification system.
- *: Use the Techstream.
PROCEDURE
| 1. | VEHICLE BROUGHT TO WORKSHOP |
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| 2. | CUSTOMER PROBLEM ANALYSIS |
(a) Confirm problem symptoms.
Click here .gif)
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| 3. | INSPECT AUXILIARY BATTERY VOLTAGE |
(a) Measure the auxiliary battery voltage with the power switch off.
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
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| 4. | PASSENGER AIRBAG ON/OFF INDICATOR CHECK |
(a) Proceed to Diagnosis System.
Click here
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| 5. | CHECK DTC (Present and History DTCs)* |
(a) Proceed to DTC Check / Clear.
Click here
| DTC is not output | .gif) | GO TO PROBLEM SYMPTOMS TABLE |
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| 6. | DIAGNOSTIC TROUBLE CODE CHART |
(a) Proceed to Diagnostic Trouble Code Chart.
Click here
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| 7. | CIRCUIT INSPECTION* |
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| 8. | REPAIR |
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| 9. | CLEAR DTCS (Present and Past DTCs)* |
(a) Proceed to DTC Check / Clear.
Click here
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| 10. | CHECK DTC* |
(a) Proceed to DTC Check / Clear.
Click here
| DTC is output | | GO TO DIAGNOSTIC TROUBLE CODE CHART |
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| 11. | CONFIRM SIMULATION |
(a) Check the passenger airbag ON/OFF indicator condition.
| Result | Proceed to |
|---|---|
| Passenger airbag ON/OFF indicator operates normally | A |
| Passenger airbag ON/OFF indicator ("OFF") and SRS warning light come on | B |
| B | | GO TO AIRBAG SYSTEM |
|
| 12. | CONFIRMATION TEST |
| NEXT | | END |
READ NEXT:
Initialization
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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 OCCUPANT DETECTION ECU HINT: Since the occupant detection ECU uses waterproof connectors, the voltage and waveform cannot be inspected directly. Standard voltage and waveforms are in
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Inspection
INSPECTION PROCEDURE 1. INSPECT POWER BACK DOOR SENSOR ASSEMBLY LH (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 (OSL) - 2 (OSLE) Not pressed 950 to 1050 Ω 1 (OSL) - 2 (OSLE) P
On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT AIR CONDITIONER PRESSURE SENSOR (a) Check the wire harness. *a Component without harness connected (Air Conditioner Pressure Sensor) *b Component without harness connected (Air Conditioning Amplifier Assembly) (1) Disconnect the A18 air condi
