Lexus ES: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
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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.
Window Defogger System
| Symptom | Suspected Area | Link |
| Window defogger system does not operate | Proceed to the "Rear Window Defogger System does not Operate" | |
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TERMINALS OF ECU CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY *A w/o Seat Heater *B w/ Seat Heater (a) Disconnect the G39 air conditioning amplifier assembly connector. (b) Measure the volta
DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage with the power switch off. Standard Voltage: 11 to 14 V If the
DATA LIST / ACTIVE TEST ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive func
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REPLACEMENT
CAUTION / NOTICE / HINT
CAUTION:
Do not remove the radiator cap sub-assembly or radiator drain cock plug while
the engine and radiator assembly are still hot. Pressurized, hot engine coolant
and steam may be released and cause serious burns.
PROCEDURE
1. DRAIN ENGINE COOLANT
ON-VEHICLE INSPECTION PROCEDURE 1. OPERATION CHECK (a) Disconnect the No. 1 vacuum hose connector from the vacuum pump assembly. Click here (b) Connect the hose of the vacuum gauge to the vacuum pump assembly. *a Vacuum Gauge *b Plug (c) Start the engine and warm i
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