Toyota Sequoia (2005). Manual — part 626

DIDKN–01

I28851

R/B No. 2

Heater Main Relay

(Marking: HTR)

Compressor

Condenser

Receiver

Pressure Switch

Integration Panel Assembly

A/C ECU

A/C Switch

Air Inlet Selector

Heater Unit

Heater Radiator

Air Mix Servomotor

Air Outlet Servomotor

Cooling Unit

Blower Motor Linear

Controller

Evaporator

Expansion Valve

Thermistor

Blower Unit

Blower Motor

Air Inlet Servomotor

Water Valve

Rear Heater
Control Assembly

Condenser Fan

Ambient
Temperature
Sensor

Solar Sensor

Room
Temperature
Sensor

Rear Room Temperature

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2299

2493

LOCATION

I21419

Water Valve

Air Outlet
Servomotor

Heater Radiator

Thermistor

Evaporator

Expansion Valve

Power Transistor

Blower Motor

DI–2300

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2494

DI3EY–08

Customer Problem Analysis

Check and Clear DTC (Pre–check)

Vehicle Brought to Workshop

Problem Symptom Confirmation

Symptom Simulation

Symptom does not
occur

DTC Check

Normal code

DTC Chart

Problem Symptoms Table

Circuit Inspection

Actuator Check

Parts Inspection

Identification of Problem

Repair

Confirmation Test

End

Items inside

are titles of pages in this

manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations.

1

2

3

4

5

6

7

8

9

10

P.

DI–2310

P.

IN–24

P.

DI–2317

P.

DI–2304

P.

DI–2319

to

DI–2381

P.

DI–2310

Malfunction code

P.

DI–2302

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2301

2495

HOW TO PROCEED WITH TROUBLESHOOTING

Perform troubleshooting in accordance with the procedure on the following page.

DI3EZ–06

Inspector’s name:

Customer’s Name

VIN

Production Date

Licence Plate No.

Odometer Reading

km
miles

/ /

How Often does Problem Occur?

Weather

Outdoor Temperature

/ /

Continuous

Intermittent ( times a day)

Fine

Cloudy

Snowy

Various /Other

Hot

Warm

Cool

Cold (Approx.

°

F

°

C

)

Symptoms

Blower motor does not operate

Blower motor speed does not change

(Always Hi, Always Med, Always Lo)

Air Flow Control is
Faulty

Cabin temperature does not go down

Response is slow

Cannot change between FRS and REC

(Always Fresh or always Recirculating)

Will not enter the desired mode

Temperature
Control is Faulty

Air Inlet Control is
Faulty

Vent Control is
Faulty

DTC Check

1st Time

2nd Time

Normal Code

Malfunction Code (Code )

Normal Code

Malfunction Code (Code )

AIR CONDITIONING SYSTEM Check Sheet

Cabin temperature does not rise

Mode will not change

DI–2302

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2496

CUSTOMER PROBLEM ANALYSIS CHECK