2005 TOYOTA AVENSIS air conditioning

BR3904
ON
OFF 0.13 sec.
0.13 sec.
05±922
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
(b)Check the DTC, using the hand±held tester.
NOTICE:
Hand±held tester only:
When the diagnostic system is switched from normal mode
to check (test) mode, it erases all DTCs and freeze frame
data recorded in normal mode. So before switching modes,
always check the DTCs and freeze frame data, and note
them down. (1)Use the hand±held tester to check the DTCs andinstructions, see the hand±held tester instruction
book.
(2)See page 05±931 to confirm the details of the
DTCs.
(c) Clear the DTC. (1) When using the hand±held tester:The following operation will erase the DTC and
freeze frame data. Operate the hand±held tester to
erase the codes.
(2) When not using the hand±held tester: Remove the EFI fuse from engine room J/B for 60
seconds or more.
3. INSPECT DIAGNOSIS (CHECK MODE)
HINT:
Hand±held tester only:
Compared to the normal mode, the check mode has high sens-
ing ability to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
Normal mode can also be detected in Check mode.
(a) Check the DTC. (1) Check the initial conditions.

Battery voltage 11 V or more

Throttle valve fully closed

Shift lever in P range

Air conditioning switched OFF
(2) Turn the ignition switch OFF.
(3) Prepare the hand±held tester.
(4) Connect the hand±held tester to DLC3.
(5) Turn the ignition switch ON and switch the hand± held tester ON.
(6) Switch the hand±held tester from Normal mode to Check mode (Check that the MIL flashes).
NOTICE:
If the hand±held tester switches the ECM from the normal
mode to the check mode or vice±versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
mode, the DTC and freeze frame data will be erased.
(7) Start the engine (MIL goes out after the enginestarts).

050TJ±13
05±1094
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
If malfunction code is displayed during the DTC check (sensor check), ch\
eck the circuit listed for the code
in the table below (Proceed to the page given for that circuit).
DTC No.
(See Page)Detection ItemTrouble AreaMemory
00Normal±±
11 *1
(05±1102)
Room temperature sensor circuit
(open/short)
Cooler thermistor (room temp. sensor)

Harness or connector between cooler thermistor (room
temp. sensor) and A/C amplifier assy

A/C amplifier assy

(8.5 min. or more)
12 *2
Ambient temperature sensor circuit
(open/short)
Thermistor assy (ambient temp. sensor)

Harness or connector between thermistor assy (ambient
temp. sensor) and combination meter

Combination meter12
(05±1106)
Combination meter

Harness or connector between combination meter and A/C
amplifier assy

A/C amplifier assy
(8.5 min. or more)
13
(05±1109)
Evaporator temperature sensor circuit
(open/short)
Cooler thermistor No.1 (evaporator temp. sensor)

Harness or connector between cooler thermistor No.1
(evaporator temp. sensor) and A/C amplifier assy

A/C amplifier assy

(8.5 min. or more)
21 *3
Solar sensor circuit (open) (Passenger
side)
Automatic light control sensor (solar sensor)

Harness or connector between automatic light control sen-
( l ) d A/C lifi

(8.5 min. or more)
21
(05±1113)
Solar sensor circuit (short) (Passenger
side)sor (solar sensor) and A/C amplifier assy

A/C amplifier assy
±
23
(05±1116)
Pressure sensor circuit
A/C tube assy (pressure sensor)

Harness or connector between A/C tube assy (pressure
sensor) and A/C amplifier assy

A/C amplifier assy
±
24 *3
Solar sensor circuit (open)
(Driver side)
Automatic light control sensor (solar sensor)

Harness or connector between automatic light control sen-
( l ) d A/C lifi

(8.5 min. or more)
24
(05±1119)
Solar sensor circuit (short)
(Driver side)sor (solar sensor) and A/C amplifier assy

A/C amplifier assy
±
31
(05±1122)
Air mix damper position sensor circuit
(Passenger side)
Air mix damper servo sub±assy (air mix damper position
sensor)

Harness or connector between air mix damper servo sub±
assy (air mix damper position sensor) and A/C amplifier
assy

A/C amplifier assy

(1 min. or more)
33
(05±1126)
Air outlet damper position sensor circuit
Mode damper servo sub±assy (mode damper position sen-
sor)

Harness or connector between mode damper servo sub±
assy (mode damper position sensor) and A/C amplifier assy

A/C amplifier assy

(1 min. or more)
36
(05±1129)
Air mix damper position sensor circuit
(Driver side)
Air mix damper servo sub±assy (Air mix damper position
sensor)

Harness or connector between air mix damper servo sub±
assy (air mix damper position sensor) and A/C amplifier
assy

A/C amplifier assy

(1 min. or more)
41
(05±1133)
Air mix damper control servomotor
(Passenger side)
Air mix damper servo sub±assy (air mix damper control)

Harness or connector between air mix damper servo sub±
assy (air mix damper control) and A/C amplifier assy

A/C amplifier assy

(15 sec.)

±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1095
AVENSIS REPAIR MANUAL (RM1018E)43
(05±1136)
Air outlet damper control servomotor
Mode damper servo sub±assy (mode damper control)

Harness or connector between mode damper servo sub±
assy (mode damper control) and A/C amplifier assy

A/C amplifier assy

(15 sec.)
46
(05±1139)
Air mix damper control servomotor
(Driver side)
Air mix damper servo sub±assy (air mix damper control )

Harness or connector between air mix damper servo sub±
assy (air mix damper control servomotor) and A/C amplifier

A/C amplifier assy

(15 sec.)
HINT:

*1: If the room temp. is approx. ±18.6
C (±3.7
F) or lower, DTC 11 may be output even though the sys-
tem is normal.

*2: If the ambient temp. is approx. ±52.9
C (±61.4
F) or lower, DTC may be output even though the
system is normal.

*3: If the check is being performed in a dark place, DTC 21 and 24 (solar \
sensor circuit abnormal) could
be displayed.

05C7I±01
Turn the ignition switch ON with AUTO
and R/F switches remain being preseed.
Indicator Check
DTC Check
(Sensor Check)
(continuous operation)
DTC Check
(Sensor Check)
(stepped operation)
Cancel check mode and start A/C control.
OFF
OFF
DEF
Actuator Check
(continuous operaiton)OFF
Actuator Check
(stepped operation)OFF
If both AUTO switch and R/F switch are
not pressed at the same time.
R/F
R/FR/F
AUTO
: Indicates a switch operation
AUTOAUTO
DEF
DEF
DEF
I35392
AUTO R/F
AC2163
Blinking pattern
ON
OFF1 sec.4times
1 sec.
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1091
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the below diagram, it is possible to enter the diag-
nosis check mode.
2. INDICATOR CHECK
(a) Turn the ignition switch ON while pressing the A/C control
AUTO switch and R/F switch simultaneously.
(b) Check that the indicators come on and go off 4 times in
succession at a interval of a second.
HINT:

After the indicator check is completed, the system enters
the DTC mode begins automatically.

Press the OFF switch to cancel the check mode.

I35392
DTCDEF
I35417ECU±B2
Fuse block:
3
2
145678
910111213141516
DLC3
A04550
05±1092
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3.DTC CHECK (SENSOR CHECK)
(a)After the indicator check is completed, the system enters the DTC check mode automatically.
(b)Read the codes displayed on the panel. Refer to the list of codes on page 05±1094 when reading the codes.
(Trouble codes are outputed at the temperature display.)
(c) If the slower display is desired, press the DEF switch and
change it to the stop operation. Each time the DEF switch
is pressed, the display changes by 1 step.
4. CLEARING DTC
(a) To clear diagnostic trouble code, there are 2 ways. (1) During sensor check, press the ºDEFº switch andºDUALº switch at the same time.
(2) Pull the ECU±B2 fuse in fuse block for 20 seconds or longer to clear the DTC memory.
5. CHECK DLC3
(a) The vehicle engine and ECT ECU uses the ISO 9141±2 (Euro±OBD)/ISO 14230 (M±OBD) communication proto-
col. The terminal arrangement of the DLC3 complies with
ISO 15031±3 and matches the ISO 9141±2/ISO 14230
format.
Terminal No.Connection/Voltage or ResistanceCondition
7Bus + Line/Pulse generationDuring transmission
4Chassis Ground
Body Ground/1
or lessAlways
5Signal Ground
Body Ground/1
or lessAlways
16Battery Positive
Body Ground/9 ± 14 VAlways

I36146
Display code R/FDEFLHD:
I36147
Display code RHD:R/FDEF
Blower level Step No.Display
codeConditions
Air flow bent Air inlet damper Compressor
ºCOOLº side (Full closed)Air mix damper
OFF FRESH
FACE 0
1
2
3
6
7
8
9
104
51
16
16
16
16
16
16
16
31 0
1
2
3
6
7
8 4
5
9FACE
FACE
FACE
B/L
FOOT1
FOOT/ DEF.
DEF.FRESH
ON
ON
ON
ON
ON
ON
ONºCOOLº side (Full closed)
ºCOOLº side (Full closed)
ºCOOLº side (Full closed)
ºCOOLº/ ºHOT º (50 % open)
ºHOTº side (Full opened)
FOOT FACE1FRESH
FRESH
RECIRCULATION
RECIRCULATION
RECIRCULATION
RECIRCULATION
RECIRCULATION
RECIRCULATIONHot gas magnetic valve
ºCOOLº/ ºHOT º (50 % open)
ºHOTº side (Full opened)
ºHOTº side (Full opened)ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF OFF
ºHOTº side (Full opened) OFF
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1093
AVENSIS REPAIR MANUAL (RM1018E)
6. ACTUATOR CHECK
(a) After entering the DTC check mode (Sensor Check
Mode) press the R/F switch.
(b) Since each damper, motor and relay automatically oper-
ates at 1 second intervals beginning in order from 10 in
the temperature display, check the temperature and air
flow from visual and by hand.
If the slower display is desired, press the DEF switch and
change it to step operation. Each time the DEF switch is
pressed, the display changes by 1 step.
HINT:

Codes are displayed from the smaller to the larger num-
bers in order.

To cancel the check mode, press the OFF switch.

050TH±09
I30150
Inspector 's name:
Customer 's NameVIN
Production Date
Licence No.
Odometer Readingkm
Miles Date vehicle
Brought In / /
Date of Problem Occurrence
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 Mid, Always Lo) Air Flow Control
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 Faulty
Air Inlet Control
Faulty
Vent Control
Faulty
DTC Check1st 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 05±1090
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
CUSTOMER PROBLEM ANALYSIS CHECK

050TG±11
05±1088
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
AIR CONDITIONING SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
1VEHICLE BROUGHT TO WORK SHOP
2CUSTOMER PROBLEM ANALYSIS (See page 05±1090)
3CHECK AND CLEAR DTC (See page 05±1091)
4 PROBLEM SYMPTOM CONFIRMATION
SYMPTOM OCCUR (GO TO STEP 6)
SYMPTOM DOES NOT OCCUR (GO TO
STEP 5)
5SYMPTOM SIMULATION (See page 01±22)
6DTC CHECK (See page 05±1091)
MALFUNCTION CODE (GO TO STEP 7)
NORMAL CODE (GO TO STEP 8)
7DTC CHART (See page 05±1094)
GO TO STEP 10
8PROBLEM SYMPTOMS TABLE (See page 05±1100)
9ACTUATOR CHECK (See page 05±1091)