Lexus NX: Problem Symptoms Table
Lexus NX Service Manual / Vehicle Interior / Pre-collision / Pre-collision System / Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
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 probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
- The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
| Symptom | Suspected Area | Link |
|---|---|---|
| "VSC Turned Off Pre-Collision Brake System Unavailable" is displayed | Check whether VSC is off | - |
| Electronically controlled brake system | | |
| Pre-collision system cannot be canceled (PCS warning light does not illuminate) | Combination meter assembly (check if indicator illuminates using Active Test) | |
| Meter/gauge system | | |
| Steering pad switch assembly | | |
| Combination meter assembly | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK FORWARD RECOGNITION CAMERA NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the i
Diagnosis System
DIAGNOSIS SYSTEM FUNCTION OF WARNING INDICATOR AND MESSAGE (a) If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message displayed on
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Pre-Collision System
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Parts Location
PARTS LOCATION ILLUSTRATION *1 HEADLIGHT ECU SUB-ASSEMBLY LH *2 HEADLIGHT ECU SUB-ASSEMBLY RH *3 HEADLIGHT ASSEMBLY LH - HEADLIGHT UNIT ASSEMBLY LH *4 HEADLIGHT ASSEMBLY RH - HEADLIGHT UNIT ASSEMBLY RH *5 ENGINE ROOM RELAY BLOCK - H-LP LH/DIMMER (HI) RELAY - H-LP MAIN LH/H-
Headlight Cleaner Control Relay(for Triple Beam Headlight)
On-vehicle InspectionON-VEHICLE INSPECTION PROCEDURE 1. INSPECT HEADLIGHT CLEANER CONTROL RELAY (a) Remove the headlight cleaner control relay. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition
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