Lexus ES: 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 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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Tire pressure warning light does not illuminate despite tire pressure decreasing | Initialization | |
| Check Data List (ID Tire Inflation Pressure) | | |
| ID code check (Registration) | | |
| Tire pressure warning light remains illuminated (Goes off during initial check) | Tire pressure warning light circuit | |
| Tire pressure warning light remains illuminated (Illuminates during initial check) | Check Data List (ID Tire Inflation Pressure) | |
| Tire pressure adjustment | | |
| ID code check (Registration) | | |
| Initialization | | |
| Initialization cannot be done | Tire pressure warning reset switch | |
| Tire position not identified | Refer to "Tire position not identified". | |
| Cannot switch to automatic ID registration mode | Refer to "Cannot switch to automatic ID registration mode". | |
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Terminals Of Ecu
TERMINALS OF ECU CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (a) Disconnect the N8 tire pressure warning ECU and receiver connector and measure the voltage or resistance on the wire harness side.
Diagnosis System
DIAGNOSIS SYSTEM CHECK WARNING LIGHT NOTICE:
When there is a problem with the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals, and illuminates after 1 m
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (for TIRE PRESSURE WARNING ECU AND RECEIVER) (a) Turn the engine switch off. (b) Connect the Techstream to the DLC3. (c) Turn the engine switch on (IG). (d) Turn the Techst
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. CONNECT TECHSTREAM (a) Connect the Techstream to the DLC3 with the ignition switch off. (b) Start the engine and run it at idle. (c) Turn the Techstream on. (d) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test. HINT: Refer to the Techstream opera
Check Bus 3 Lines for Short Circuit
DESCRIPTION There may be a short circuit between the CAN main bus lines and/or CAN branch lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the central gateway ECU (network gateway ECU) is below 54 Ω. Symptom Trouble Area Resistance between terminals 6 (CA3H) and 21 (CA
