Almera Tino V10 (2003 year). Manual — part 37
TROUBLE DIAGNOSIS
ATC-49
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ATC
AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of
±
3
°
C (
±
6
°
F) between temperature setting (displayed dig-
itally) and temperature felt by driver.
Operating procedures for this trimmer are as follows:
●
Begin Self-diagnosis STEP 5 mode.
●
Press
(fan) UP switch to set system in auxiliary mode.
●
Display shows 61 in auxiliary mechanism.It takes approximately 3 seconds.
●
Turn the temperature dial as desired. Temperature will change at a rate of 1
°
C (2
°
F) each time a dial is
turned.
When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of initial
condition, i.e. 0
°
C (0
°
F).
RJIA0778E
ATC-50
TROUBLE DIAGNOSIS
Operational Check
EJS0030A
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1.
Set the temperature 90
°
F or 32
°
C.
2.
Press OFF switch.
3.
Turn the ignition switch OFF.
4.
Turn the ignition switch ON.
5.
Press the AUTO switch.
6.
Confirm that the set temperature remains at previous tempera-
ture.
7.
Press OFF switch.
If NG, go to
.
If OK, continue with next check.
CHECKING BLOWER
1.
Press fan switch (up side) one time. Blower should operate on
low speed.The fan symbol should have one blade lit
.
2.
Press fan switch (up side) one more time, and continue check-
ing blower speed and fan symbol until all speeds are checked.
3.
Leave blower on MAX. speed.
If NG, go to
ATC-68, "Blower Motor Circuit"
.
If OK, continue with next check.
Conditions
:Engine running and at usual operating temperature
RJIA1683E
RJIA1684E
TROUBLE DIAGNOSIS
ATC-51
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CHECKING DISCHARGE AIR
1.
Press mode switch four times and DEF button.
2.
Each position indicator should change shape.
3.
Confirm that discharge air comes out according to the air distri-
bution table. Refer to
.
Intake door position is checked in the next step.
If NG, go to
ATC-59, "Mode Door Motor Circuit"
.
If OK, continue with next check.
NOTE:
Confirm that the compressor clutch is engaged (visual inspection)
and intake door position is at FRESH when the DEF is selected.
RJIA1685E
RHA280I
ATC-52
TROUBLE DIAGNOSIS
CHECKING RECIRCULATION
1.
Press recirculation (REC) switch one time. Recirculation indica-
tor should illuminate.
2.
Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to
ATC-65, "Intake Door Motor Circuit"
.
If OK, continue with next check.
CHECKING FRESH SWITCH
1.
Press fresh (FRE) switch one time. Fresh switch indicator
should illuminate.
2.
Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to
ATC-65, "Intake Door Motor Circuit"
.
If OK, continue with next check.
CHECKING TEMPERATURE DECREASE
1.
Turn the temperature dial until 18
°
C (60
°
F) is displayed.
2.
Check for cold air at discharge air outlets.
If NG, go to
ATC-82, "Insufficient Cooling"
.
If OK, continue with next check.
CHECKING TEMPERATURE INCREASE
1.
Turn the temperature dial until 32
°
C (90
°
F) is displayed.
2.
Check for hot air at discharge air outlets.
If NG, go to
ATC-90, "Insufficient Heating"
.
If OK, continue with next check.
RJIA1686E
RJIA1687E
RJIA1688E
RJIA1689E
TROUBLE DIAGNOSIS
ATC-53
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ATC
CHECKING AUTO MODE
1.
Press temperature dial.
2.
Display should indicate AUTO (not ECON).
●
Confirm that the compressor clutch engages (audio or visual
inspection). (Discharge air and blower speed will depend on
ambient, in-vehicle, and set temperatures.)
If NG, go to
ATC-54, "Power Supply and Ground Circuit for Auto
, then if necessary, go to
ATC-74, "Magnet Clutch Circuit"
.
If all operational check are OK (symptom can not be duplicated), go
to Incident Simulation Tests in GI-21, “How to Perform Efficient Diag-
nosis for an Electrical Incident” and perform tests as outlined to sim-
ulate driving conditions environment. If symptom appears, refer to
and perform applicable trouble diag-
nosis procedures.
RJIA1690E
ATC-54
TROUBLE DIAGNOSIS
Power Supply and Ground Circuit for Auto Amp.
EJS0030B
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
COMPONENT DESCRIPTION
Automatic Amplifier (Auto Amp.)
The auto amplifier has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The auto amplifier is unitized with control mechanisms. When the
various switches and temperature adjustment dial are operated, data
is input to the auto amp. from the AV AND NAVI CONTROL UNIT (or
DISPLAY UNIT) using multiplex communication.
Self-diagnostic functions are also built into auto amplifier to provide
quick check of malfunctions in the auto air conditioner system.
Potentio Temperature Control (PTC)
The PTC is built into the multi-function switch. It can be set at an
interval of 0.5
°
C (1.0
°
F) in the 18
°
C (60
°
F) to 32
°
C (90
°
F) tempera-
ture range by turning the temperature dial. The set temperature is
displayed.
*1
EL-11, “POWER SUPPLY ROUT-
ING”
*2
*3
ATC-55, "DIAGNOSTIC PROCE-
DURE FOR A/C SYSTEM"
RJIA1691E
RJIA0750E
RJIA1692E
TROUBLE DIAGNOSIS
ATC-55
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ATC
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
1.
CHECK POWER SUPPLY CIRCUIT FOR AUTO AMP.
OK or NG
OK
>> GO TO 2.
NG
>> Check 10A fuses (Nos. 10 and 12) and 15A fuses (Nos. 14 and 16) located in the fuse block (J/B).
●
If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
●
If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as
necessary.
2.
CHECK GROUND CIRCUIT FOR AUTO AMP.
OK or NG
OK
>> Replace auto amp. INSPECTION END
NG
>> Repair or replace harness.
RJIA0768E
Terminal
Ignition switch position
(+)
(-)
OFF
ACC
ON
Auto amp.
connector
Terminal No.
(Wire color)
M111
26 (R/B)
Ground
Approx.
12V
Approx.
12V
Approx.
12V
27 (Y/G)
Approx.
0V
Approx.
0V
Approx.
12V
33 (L/W)
Approx.
0V
Approx.
12V
Approx.
12V
RJIA0769E
Terminal
Continuity
(+)
(-)
Auto amp. con-
nector
Terminal No.
(Wire color)
M111
24 (B)
Ground
Yes
RJIA0770E
ATC-56
TROUBLE DIAGNOSIS
LAN System Circuit
EJS0030C
SYMPTOM: Mode door motor, intake door motor and/or air mix door motor does not operate normally.
DIAGNOSTIC PROCEDURE FOR LAN SYSTEM CIRCUIT
1.
CHECK POWER SUPPLY FOR AUTO AMP.
OK or NG
OK
>> GO TO 2.
NG
>> Replace auto amp.
2.
CHECK SIGNAL FOR AUTO AMP.
Confirm A/C LAN signal using an oscilloscope.
OK or NG
OK
>> GO TO 3.
NG
>> Replace auto amp.
RJIA1326E
Terminal
Voltage
(+)
(-)
Auto amp. connec-
tor
Terminal No.
(Wire color)
M111
21 (G/Y)
Ground
Approx. 12V
RJIA0273E
Terminal
Voltage
(+)
(-)
Auto amp. connector
Terminal No.
(Wire color)
M110
5 (R/Y)
Ground
HAK0652D
TROUBLE DIAGNOSIS
ATC-57
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ATC
3.
CHECK POWER SUPPLY FOR MOTOR
OK or NG
OK
>> GO TO 4.
NG
>> Replace harness or connector.
4.
CHECK SIGNAL FOR MOTOR
Confirm A/C LAN signal using an oscilloscope.
OK or NG
OK
>> GO TO 5.
NG
>> Replace harness or connector.
5.
CHECK MOTOR GROUND CIRCUIT
OK or NG
OK
>> GO TO 6.
NG
>> Replace harness or connector.
Door motor
Terminal
Voltage
(+)
(-)
Connector
Terminal No.
(Wire color)
Mode
M89
1 (G/Y)
Ground
Approx.
12V
Air mix
M88
1 (G/Y)
Intake
M98
1 (G/Y)
RJIA0509E
Door motor
Terminal
Voltage
(+)
(-)
Connector
Terminal No.
(Wire color)
Mode
M89
3 (R/Y)
Ground
Air mix
M88
3 (R/Y)
Intake
M98
3 (R/Y)
HAK0652D
Door motor
Terminal
Continuity
(+)
(-)
Connector
Terminal No.
(Wire color)
Mode
M89
2 (B)
Ground
Yes
Air mix
M88
2 (B)
Intake
M98
2 (B)
RJIA0511E
ATC-58
TROUBLE DIAGNOSIS
6.
CHECK MOTOR OPERATION
Disconnect and reconnect the motor connector and confirm the motor operation.
OK or NG
OK
>> (Return to operate normally.)
●
Poor contacting the motor connector
NG
>> (Does not operate normally.)
●
GO TO 7
7.
CHECK MODE DOOR MOTOR OPERATION
1.
Disconnect mode door motor and air mix door motor connector.
2.
Reconnect mode door motor connector and confirm the mode door motor operation.
OK or NG
OK
>> (Mode door motor operates normally.)
●
GO TO 8
NG
>> (Mode door motor does not operate normally.)
●
Replace the mode door motor.
8.
CHECK AIR MIX DOOR MOTOR OPERATION
1.
Disconnect mode door motor connector.
2.
Reconnect air mix door motor connector and confirm the air mix door motor operation.
OK or NG
OK
>> (Air mix door motor operates normally.)
●
GO TO 9
NG
>> (Air mix door motor does not operate normally.)
●
Replace the air mix door motor.
9.
CHECK INTAKE DOOR MOTOR OPERATION
1.
Disconnect air mix door motor connector.
2.
Reconnect intake door motor connector and confirm the intake door motor operation.
OK or NG
OK
>> (Intake door motor operates normally.)
●
Replace auto amp.
NG
>> (Intake door motor does not operate normally.)
●
Replace intake door motor.
TROUBLE DIAGNOSIS
ATC-59
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ATC
Mode Door Motor Circuit
EJS0030D
SYMPTOM:
●
Air outlet does not change.
●
Mode door motor does not operate normally.
INSPECTION FLOW
*1
*2
*3
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.1
*4
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 5
*5
ATC-95, "Ambient Sensor Circuit"
*6
ATC-97, "In-vehicle Sensor Circuit"
*7
ATC-100, "Sunload Sensor Circuit"
*8
ATC-62, "Air Mix Door Motor Circuit"
*9
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.14
RJIA1693E
ATC-60
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
●
Auto amp.
●
Mode door motor (LCU)
●
A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
●
In-vehicle sensor
●
Ambient sensor
●
Sunload sensor
●
Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier sends air mix door, mode door and
intake door opening angle data to the air mix door motor LCU, mode door motor LCU and intake door motor
LCU.
The air mix door motor, mode door motor and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the auto amplifier and each of the motor posi-
tion sensors are compared by the LCUs in each motor with the existing decision and opening angles. Subse-
quently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new
selection data is returned to the auto amplifier.
Mode Door Control Specification
*10
*11
ATC-61, "COMPONENT DESCRIP-
TION"
*12
*13
*14
ATC-103, "Intake Sensor Circuit"
*15
ATC-51, "CHECKING DISCHARGE
AIR"
RJIA0773E
RHA384HA
TROUBLE DIAGNOSIS
ATC-61
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ATC
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit. It
rotates so that air is discharged from the outlet set by the auto ampli-
fier. Motor rotation is conveyed to a link which activates the mode
door.
DIAGNOSTIC PROCEDURE FOR MODE DOOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to
.
RJIA0774E
RJIA0775E
ATC-62
TROUBLE DIAGNOSIS
Air Mix Door Motor Circuit
EJS0030E
SYMPTOM:
●
Discharge air temperature does not change.
●
Air mix door motor does not operate.
INSPECTION FLOW
*1
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.1
*2
ATC-95, "Ambient Sensor Circuit"
*3
ATC-97, "In-vehicle Sensor Circuit"
*4
ATC-100, "Sunload Sensor Circuit"
*5
ATC-62, "Air Mix Door Motor Cir-
cuit"
*6
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*7
*8
*9
*10
*11
ATC-103, "Intake Sensor Circuit"
*12
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 7
RJIA1694E
TROUBLE DIAGNOSIS
ATC-63
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ATC
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
●
Auto amp.
●
Air mix door motor (LCU)
●
A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
●
In-vehicle sensor
●
Ambient sensor
●
Sunload sensor
●
Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier sends air mix door, mode door and
intake door motor opening angle data to the air mix door motor LCU, mode door motor LCU and intake door
motor LCU.
The air mix door motor, mode door motor and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the auto amplifier and each of the motor posi-
tion sensors are compared by the LCUs in each motor with the existing decision and opening angles. Subse-
quently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new
selection data is returned to the auto amplifier.
Air Mix Door Control Specification
RJIA0777E
RHA457H
ATC-64
TROUBLE DIAGNOSIS
COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motor is attached to the heater & cooling unit. It
rotates so that the air mix door is opened or closed to a position set
by the auto amplifier. The air mix door position is then fed back to the
auto amplifier by PBR built-in air mix door motor.
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
SYMPTOM: Discharge air temperature does not change.
Perform diagnostic procedure for LAN system circuit. Refer to
.
RJIA0774E
RJIA0775E
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