Toyota Venza: How To Proceed With Troubleshooting

Toyota Venza Service Manual / Window / Glass / Window Defogger System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the window defogger system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

The following 5 items are important points in the problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

3.	INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

4.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table (See page ).

Result	Proceed to
Fault is not listed in Problem Symptoms Table.	A
Fault is listed in Problem Symptoms Table.	B

GO TO STEP 6

5.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU (See page )

(b) Data List / Active Test (See page )

6.	REPAIR OR REPLACE

7.	CONFIRMATION TEST

END

System Diagram

SYSTEM DIAGRAM Communication Table Transmitting ECU Receiving ECU Signal Communication Method Air Conditioning Control Assembly ...

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 lis ...

Other materials about Toyota Venza:

Unmatched Key Code (B2795)
DESCRIPTION This DTC is stored when a key with a key code that has not been registered in the ECU is inserted into the ignition key cylinder. DTC No. DTC Detection Condition Trouble Area B2795 Ke ...

Vehicle Speed or Engine Speed Signal Malfunction (C2173/73)
DESCRIPTION The tire pressure warning ECU receives a vehicle speed signal from the combination meter and an engine speed signal from the ECM. The tire pressure warning ECU uses these signals to detect DTCs C2121/21 to C2124/24 (No Signal from Transmitter) ...

Window Glass Antenna Wire
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT WINDOW GLASS ANTENNA WIRE (a) Check for continuity of the antenna. HINT: Check for continuity at the center of each antenna wire as shown in the illustration. N ...