Almera Tino V10 (2003 year). Manual

TROUBLE DIAGNOSIS

ATC-49

ATC

AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER

The trimmer compensates for differences in range of

C (

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

Set the temperature 90

F or 32

Press OFF switch.

Turn the ignition switch OFF.

Turn the ignition switch ON.

Press the AUTO switch.

Confirm that the set temperature remains at previous tempera-
ture.

Press OFF switch.

If NG, go to

ATC-94, "Memory Function"

If OK, continue with next check.

CHECKING BLOWER

Press fan switch (up side) one time. Blower should operate on
low speed.The fan symbol should have one blade lit

Press fan switch (up side) one more time, and continue check-
ing blower speed and fan symbol until all speeds are checked.

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

ATC

CHECKING DISCHARGE AIR

Press mode switch four times and DEF button.

Each position indicator should change shape.

Confirm that discharge air comes out according to the air distri-
bution table. Refer to

ATC-27, "Discharge Air Flow"

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

Press recirculation (REC) switch one time. Recirculation indica-
tor should illuminate.

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

Press fresh (FRE) switch one time. Fresh switch indicator
should illuminate.

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

Turn the temperature dial until 18

C (60

F) is displayed.

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

Turn the temperature dial until 32

C (90

F) is displayed.

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

ATC

CHECKING AUTO MODE

Press temperature dial.

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

Amp."

, 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

ATC-29, "SYMPTOM TABLE"

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.

EL-11, “POWER SUPPLY ROUT-
ING”

ATC-50, "Operational Check"

ATC-55, "DIAGNOSTIC PROCE-
DURE FOR A/C SYSTEM"

RJIA1691E

RJIA0750E

RJIA1692E

TROUBLE DIAGNOSIS

ATC-55

ATC

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM

SYMPTOM: A/C system does not come on.

CHECK POWER SUPPLY CIRCUIT FOR AUTO AMP.

OK or NG

>> GO TO 2.

>> 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.

CHECK GROUND CIRCUIT FOR AUTO AMP.

OK or NG

>> Replace auto amp. INSPECTION END

>> Repair or replace harness.

RJIA0768E

Terminal

Ignition switch position

(+)

(-)

OFF

ACC

Auto amp.

connector

Terminal No.

(Wire color)

M111

26 (R/B)

Ground

Approx.

12V

Approx.

12V

Approx.

12V

27 (Y/G)

Approx.

12V

33 (L/W)

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

CHECK POWER SUPPLY FOR AUTO AMP.

OK or NG

>> GO TO 2.

>> Replace auto amp.

CHECK SIGNAL FOR AUTO AMP.

Confirm A/C LAN signal using an oscilloscope.

OK or NG

>> GO TO 3.

>> 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

ATC

CHECK POWER SUPPLY FOR MOTOR

OK or NG

>> GO TO 4.

>> Replace harness or connector.

CHECK SIGNAL FOR MOTOR

Confirm A/C LAN signal using an oscilloscope.

OK or NG

>> GO TO 5.

>> Replace harness or connector.

CHECK MOTOR GROUND CIRCUIT

OK or NG

>> GO TO 6.

>> 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

CHECK MOTOR OPERATION

Disconnect and reconnect the motor connector and confirm the motor operation.

OK or NG

>> (Return to operate normally.)

●

Poor contacting the motor connector

>> (Does not operate normally.)

●

GO TO 7

CHECK MODE DOOR MOTOR OPERATION

Disconnect mode door motor and air mix door motor connector.

Reconnect mode door motor connector and confirm the mode door motor operation.

OK or NG

>> (Mode door motor operates normally.)

●

GO TO 8

>> (Mode door motor does not operate normally.)

●

Replace the mode door motor.

CHECK AIR MIX DOOR MOTOR OPERATION

Disconnect mode door motor connector.

Reconnect air mix door motor connector and confirm the air mix door motor operation.

OK or NG

>> (Air mix door motor operates normally.)

●

GO TO 9

>> (Air mix door motor does not operate normally.)

●

Replace the air mix door motor.

CHECK INTAKE DOOR MOTOR OPERATION

Disconnect air mix door motor connector.

Reconnect intake door motor connector and confirm the intake door motor operation.

OK or NG

>> (Intake door motor operates normally.)

●

Replace auto amp.

>> (Intake door motor does not operate normally.)

●

Replace intake door motor.

TROUBLE DIAGNOSIS

ATC-59

ATC

Mode Door Motor Circuit

EJS0030D

SYMPTOM:

●

Air outlet does not change.

●

Mode door motor does not operate normally.

INSPECTION FLOW

ATC-27, "Discharge Air Flow"

ATC-50, "Operational Check"

ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No.1

ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No. 5

ATC-95, "Ambient Sensor Circuit"

ATC-97, "In-vehicle Sensor Circuit"

ATC-100, "Sunload Sensor Circuit"

ATC-62, "Air Mix Door Motor Circuit"

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

ATC-56, "LAN System Circuit"

*11

ATC-61, "COMPONENT DESCRIP-
TION"

*12

ATC-50, "Operational Check"

*13

ATC-29, "SYMPTOM TABLE"

*14

ATC-103, "Intake Sensor Circuit"

*15

ATC-51, "CHECKING DISCHARGE
AIR"

RJIA0773E

RHA384HA

TROUBLE DIAGNOSIS

ATC-61

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

ATC-56, "LAN System Circuit"

RJIA0774E

RJIA0775E

TROUBLE DIAGNOSIS

ATC-63

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

Almera Tino V10 (2003 year). Manual - part 37