Toyota Venza: How To Proceed With Troubleshooting

Toyota Venza Service Manual / Heating / Air Conditioning / Air Conditioning System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the air conditioning system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

(a) Inspect 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.

3.	CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the LIN communication system is functioning normally.

Result	Proceed to
LIN DTC is not output	A
LIN DTC is output	B ( )

Result

Proceed to

LIN DTC is not output

LIN DTC is output

( )

GO TO LIN COMMUNICATION SYSTEM

4.	CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result	Proceed to
CAN DTC is not output	A
CAN DTC is output	B ( )

Result

Proceed to

CAN DTC is not output

CAN DTC is output

( )

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK FOR DTC*

(a) Check for DTCs and note any code that is output.

(b) Clear the DTCs.

(c) Recheck for DTCs. Based on the DTCs output above, try to force the A/C system to output DTCs by simulating the conditions indicated by the DTC.

Result	Proceed to
DTC is not output	A
DTC is output	B

GO TO STEP 8

6.	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 8

7.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Panel diagnosis (indicator check) (See page )

(b) Panel diagnosis (sensor check) (See page )

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

(e) Terminals of ECU (See page )

(f) On-vehicle Inspection

(g) Inspection

8.	ADJUST, REPAIR OR REPLACE

END

System Description

SYSTEM DESCRIPTION 1. GENERAL (a) The air conditioning system has the following controls. Control Outline Neural Network Control This control is ca ...

Customize Parameters

CUSTOMIZE PARAMETERS NOTICE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings be ...

Other materials about Toyota Venza:

Initialization
INITIALIZATION NOTICE: Initialize the headlight leveling ECU assembly (set the zero point of the height control sensor in the headlight leveling ECU assembly) after the vehicle height changes due to replacement of the suspension or after ...

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT DOOR SCUFF PLATE LH 2. REMOVE COWL SIDE TRIM SUB-ASSEMBLY LH 3. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL 4. REMOVE OUTER MIRROR SWITCH ASSEMBLY (a) Disengage the 2 claws and remove the outer m ...

Front Seat Inner Belt Assembly
Components COMPONENTS ILLUSTRATION ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT FRONT SEAT INNER BELT ASSEMBLY LH (w/ Seat Position Memory System) (a) Measure the resistance according to the value(s) in the table below. ...