Toyota Sequoia (2005). Manual - part 629

I22575

DOME Fuse

Engine Room J/B

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2311

2505

3.

CLEARING DTC

(a)

Pull out the DOME fuse from the engine room J/B for 10
sec. or longer to clear the diagnostic DTC’s memory.

(b)

After reinserting the fuse, check that the normal code is
output.

DIDKR–01

AT0716

0.5 Seconds

0.5 Seconds

ON

OFF

Turn ignition switch ON with AUTO and 
R/F switches held down.

Indicator Check

       DTC Check
     (Sensor Check)
(continuous operation)

     DTC Check
   (Sensor Check)
(stepped operation)

Cancel check mode and start A/C 
control

     Actuator Check
(continuous operation)

   Actuator Check
(stepped operation)

AUTO switch and R/F switch are 
not pressed at the same time.

OFF

OFF

OFF

OFF

R/F

R/F

R/F

AUTO

AUTO

AUTO

: Indicates a switch operation.

DEF

DEF

DEF

DEF

R/F: Recirculation/Fresh select switch

DEF: Defogger switch

DI–2312

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2506

CHECK MODE PROCEDURE

1.

WARNING FOR A/C COMPRESSOR LOCK

If compressor lock occurs during A/C operation, the A/C switch
indicator on the A/C control assembly starts blinking.
When this occurs, check for compressor lock (DTC 22) using
diagnosis trouble code check then proceed to inspect the circuit
or the component.
Compressor lock sensor circuit.  

→

 (See page 

DI–2339

)

2.

LIST OF OPERATION METHODS

By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diag-
nosis check mode.

A04550

1 2 3 4 5 6 7 8

9 10111213141516

DLC3

I15897

AUTO S/W

R/F S/W

AC2163

Blinking Pattern

4 times

1 sec.

1 sec.

ON

OFF

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

DI–2313

2507

3.

CHECK DLC3

The vehicle’s ECM uses the ISO 9141–2 communication proto-
col. The terminal arrangement of the DLC3 complies with SAE
J1962 and matches the ISO 9141–2 format.

Symbols (Terminal No.)

Terminal Description

Condition

Specified Condition

SIL (7) – SG (5)

Bus ”+” line

During transmission

Pulse generation

CG (4) – Body ground

Chassis ground

Always

Below 1 

Ω

SG (5) – Body ground

Signal ground

Always

Below 1 

Ω

BAT (16) – Body ground

Battery positive

Always

11 to 14 V

4.

INDICATOR CHECK

(a)

Turn the ignition switch on while pressing the A/C control
AUTO switch and R/F SW simultaneously.

(b)

Check that all the indicators light up and go off at 1 second
intervals 4 times in succession.

HINT:

After the indicator check is ended, the diagnostic trouble
code check begins automatically.

Press the OFF switch when desiring to cancel the check
mode.

DIDKS–01

DI–2314

–

DIAGNOSTICS

AIR CONDITIONING SYSTEM

2508

DATA LIST / ACTIVE TEST

1.

DATA LIST

HINT:
From the DATA LIST displayed on the hand–held tester, you can read the values of the displays, sensors,
actuators and so on without part removal. Reading the DATA LIST as the first step of troubleshooting is one
way to shorten labor time.
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch to the ON position.

(c)

From the display on the tester, select ”DATA LIST”.

AIR CONDITIONING:

Item

Measurement Item / Display

(Range)

Normal Condition

Diagnostic Note

ROOM TEMP

Room temperature sensor / 

min.: –6.5

°

C (20.3

°

F) 

max.: 57.25

°

C (135.05

°

F)

Actual room temperature is dis-

played

Open in the circuit: 

–6.5

°

C (20.3

°

F)

Short in the circuit: 

57.25

°

C (135.05

°

F)

AMBI TEMP SENS

Ambient temperature sensor / 

min.: –30.8

°

C (–23.44

°

F) 

max.: 

50.8°

C (123.44

°

F)

Actual ambient temperature is dis-

played

Open in the circuit: 

–30.8

°

C (–23.44

°

F)

Short in the circuit: 

50.8°

C (123.44

°

F)

EVAP TEMP

Evaporator temperature sensor / 

min.: –29.7

°

C (–21.46

°

F) 

max.: 59.55

°

C (139.19

°

F)

Actual evaporator temperature is

displayed

Open in the circuit: 

–29.7

°

C (–21.46

°

F)

Short in the circuit: 

59.55

°

C (139.19

°

F)

SOLAR SENS–D

Solar sensor (Driver side) / 

min.: 0 max.: 255

Increases as brightness increases

Open in the circuit: 0

Short in the circuit: 255

COOLANT TEMP

Engine coolant temperature / 

min.: 1.3

°

C (34.34

°

F) 

max.: 90.55

°

C (194.99

°

F)

Actual engine coolant temperature

is displayed while the engine is

warmed up

–

SET TEMP–D

Set temperature (Driver side) / 

min.: 0 max.: 255

Set temperature and displayed

temperature are the same

–

ESTIMATE TEMP–D

Estimated temperature (Driver

side) / min.: –200

°

C (–328

°

F)

max.: 

200°

C (392

°

F)

Damper is at ”MAX. COOL”: 

–200

°

C (–328

°

F)

Damper is at ”MAX. HOT”: 

200°

C (392

°

F)

–

A/M DAMP POS–D

Air mix damper position (Driver

side) / min.: –14% max.: 113.5%

Damper is at ”MAX. COOL”: 

–10.0%

Damper is at ”MAX. HOT”: 

100.0%

–

A/I DAMP POS

Air inlet damper position / 

min.: –9% max.: 109%

Damper is at ”RECIRCULATION”:

–9%

Damper is at ”FRESH”: 109.0%

Damper is at ”HALF–RECIR-

CULATION”: 30.0 to 80.0%

Open in the circuit: 50.0%

A/M DAMP TARG–D

Air mix damper target position 

(Driver side) / 

min.: –14% max.: 113.5%

Damper is at ”MAX. COOL”: 

–10.0%

Damper is at ”MAX. HOT”: 

100.0%

–

A/I DAMP TARG

Air inlet damper target position / 

min.: –9% max.: 109%

Damper is at ”RECIRCULATION”:

–9%

Damper is at ”FRESH”: 109.0%

Damper is at ”HALF–RECIR-

CULATION”: 30.0 to 80.0%

Open in the circuit: 50.0%