Almera Tino V10 (2003 year). Manual

TROUBLE DIAGNOSIS

ATC-65

ATC

Intake Door Motor Circuit

EJS0030F

SYMPTOM:

●

Intake door does not change.

●

Intake door motor does not operate normally.

INSPECTION FLOW

ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No.1

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.

ATC-56, "LAN System Circuit"

ATC-66, "COMPONENT DESCRIP-
TION"

ATC-50, "Operational Check"

RJIA1695E

ATC-66

TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts

Intake door control system components are:

●

Auto amp.

●

Intake 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.

COMPONENT DESCRIPTION
Intake Door Motor

The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the auto amplifier. Motor rotation is
conveyed to a lever which activates the intake door.

*10

ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No.5 or 7

*11

ATC-50, "Operational Check"

*12

ATC-29, "SYMPTOM TABLE"

*13

ATC-103, "Intake Sensor Circuit"

RJIA0781E

RJIA0782E

TROUBLE DIAGNOSIS

ATC-69

ATC

SYSTEM DESCRIPTION
Component Parts

Fan speed control system components are:

●

Auto amp.

●

A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)

●

Fan control amp.

●

In-vehicle sensor

●

Ambient sensor

●

Sunload sensor

●

Intake sensor

System Operation

Automatic Mode

In the automatic mode, the blower motor speed is calculated by the automatic amplifier based on input from
the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor applied voltage ranges from approximately 4 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 4 to 12V), the automatic amplifier supplies a gate voltage to the fan
control amplifier. Based on this voltage, the fan control amplifier controls the voltage supplied to the blower
motor.

Starting Fan Speed Control

Start Up From COLD SOAK Condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 56

C (133

F), the blower will not

operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient and engine coolant temperature.

ATC-41, "Self-diagnosis Function"

ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"

, see No.14.

ATC-70, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR"

ATC-50, "Operational Check"

ATC-29, "SYMPTOM TABLE"

QG engine (With EURO–OBD):

EC-

188, "DTC P0117, P0118 ECT SEN-
SOR"

QG engine (Without EURO–OBD):

EC-660, "DTC P0117, P0118 ECT
SENSOR"

YD engine:

EC-1046, "DTC P0117,

P0118 ECT SENSOR"

RJIA0785E

ATC-70

TROUBLE DIAGNOSIS

In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56

C (133

F), at which time the blower speed will increase to the objective speed.

Start Up From Usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the A/C button is pushed. The blower speed will gradually
rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).

Blower Speed Compensation

Sunload
When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low
speed. The low speed will vary depending on the sunload. During conditions of low or no sunload, the blower
low speed is usual low speed (approx. 4V). During high sunload conditions, the auto amp causes the blower
fan speed to increase.(Approx. 7V)

Fan Speed Control Specification

COMPONENT DESCRIPTION
Fan Control Amplifier

The fan control amplifier is located on the heater & cooling unit. The
fan control amp. receives a gate voltage from the auto amp. to step-
lessly maintain the blower fan motor voltage in the 4 to 12 volt range.

NOTE:
This illustration is for LHD models. The layout for RHD models is
symmetrically opposite.

DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR

SYMPTOM: Blower motor operation is malfunctioning under starting
fan speed control.

RJIA0522E

RHA625H

RJIA2346E

TROUBLE DIAGNOSIS

ATC-71

ATC

CHECK POWER SUPPLY FOR BLOWER MOTOR

Disconnect blower motor harness connector.

OK or NG

>> GO TO 2.

>> Check power supply circuit and 15A fuses [Nos. 14 and

16, located in the fuse block (J/B)]. Refer to EL-11,
"POWER SUPPLY ROUTING”.

●

If OK, check for open circuit in wiring harness. Repair or replace as necessary.

●

If NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.

CHECK FAN FEED BACK CIRCUIT

OK or NG

>> GO TO 3.

>> Repair harness or connector.

CHECK BLOWER MOTOR

Refer to

ATC-73, "COMPONENT INSPECTION"

OK or NG

>> GO TO 4.

>> Replace blower motor.

CHECK POWER SUPPLY FOR FAN CONTROL AMP.

Reconnect blower motor connector.

Disconnect fan control amp. harness connector.

OK or NG

>> GO TO 5.

>> Repair harness or connector.

Terminal

Voltage

(+)

(-)

Blower motor con-

nector

Terminal No.

(Wire color)

M53

1 (L/W)

Ground

Approx. 12V

RJIA0524E

Terminal

Condition

Voltage

(+)

(-)

Auto amp.

connector

Terminal No.

(Wire color)

M111

34 (L/B)

Ground

Fan speed: 1st

Approx. 8V

RJIA0787E

Terminal

Voltage

(+)

(-)

Fan control amp.

connector

Terminal No.

(Wire color)

M90

3 (L/B)

Ground

Approx. 12V

RJIA0526E

ATC-72

TROUBLE DIAGNOSIS

CHECK GROUND CIRCUIT FOR FAN CONTROL AMP.

OK or NG

>> GO TO 6.

>> Repair harness or connector.

CHECK FOR AUTO AMP. OUTPUT

Reconnect the fan control amp. harness connector.

OK or NG

>> GO TO 9.

●

If the voltage is less than 2.5V: GO TO 8.

●

If the voltage is more than 9.0V: GO TO 7.

CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND FAN CONTROL AMP.

Disconnect the auto amp. harness connector and fan control amp.
harness connector.

OK or NG

>> Replace fan control amp.

>> Repair harness or connector.

CHECK FAN CONTROL AMP.

Disconnect the fan control amp. harness connector.

OK or NG

>> GO TO 9.

>> Replace fan control amp.

Terminal

Continuity

(+)

(-)

Fan control amp.

connector

Terminal No.

(Wire color)

M90

1 (B)

Ground

Yes

RJIA0527E

Terminal

Condition

Voltage

(+)

(-)

Fan control

amp. connec-

tor

Terminal No.

(Wire color)

M90

2 (L/Y)

Ground

Fan speed: 1 - 4

Approx. 2.5 - 3.5

Fan speed: 5

Approx. 9.0

RJIA0528E

Terminal

Continuity

Auto amp.

Fan control amp.

Connector

Terminal No.

(Wire color)

Connector

Terminal No.

(Wire color)

M111

35 (L/Y)

M90

2 (L/Y)

Yes

RJIA0788E

Terminal

Continuity

(+)

(-)

Fan control

amp. connector

Terminal No.

(Wire color)

Fan control

amp. connector

Terminal No.

(Wire color)

M90

Yes

RJIA0530E

TROUBLE DIAGNOSIS

ATC-73

ATC

CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND FAN CONTROL AMP.

OK or NG

>> Replace auto amp.

>> Repair harness or connector.

COMPONENT INSPECTION
Blower Motor

Confirm smooth rotation of the blower motor.

●

Ensure that there are no foreign particles inside the intake unit.

Terminal

Continuity

(+)

(-)

Auto amp.

connector

Terminal No.

(Wire color)

Fan control

amp. Con-

nector

Terminal No.

(Wire color)

M111

34 (L/B)

M90

3 (L/B)

Yes

RJIA0789E

RJIA0790E

TROUBLE DIAGNOSIS

ATC-75

ATC

SYSTEM DESCRIPTION

Auto amplifier controls compressor operation by ambient temperature and signal from ECM.

Low Temperature Protection Control

Auto amplifier will turn the compressor ON or OFF as determined by
a signal detected by ambient sensor.
When ambient temperatures are greater than

−

C (28

F), the com-

pressor turns ON. The compressor turns OFF when ambient temper-
atures are less than

−

C (23

F).

DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

RHA094GB

RJIA2347E

ATC-76

TROUBLE DIAGNOSIS

CHECK POWER SUPPLY FOR COMPRESSOR

Disconnect compressor harness connector.

OK or NG

>> Check magnet clutch coil.

1. If NG, replace magnet clutch. Refer to

ATC-135,

"Compressor Clutch"

2. Go to

ATC-42, "FUNCTION CONFIRMATION PROCEDURE"

and perform self-diagnosis

STEP-4. Confirm that magnet clutch operation is usual.

>> Disconnect A/C relay. And GO TO 2.

CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR

OK or NG

>> Check harness for short. And GO TO 3.

>> Repair harness or connector.

CHECK POWER SUPPLY FOR A/C RELAY

Disconnect A/C relay.

OK or NG

>> GO TO 4.

>> Check power supply circuit and 10A (No.15) fuse at fuse

block. Refer to EL-11, "POWER SUPPLY ROUTING".

●

If OK, check for open circuit in wiring harness. Repair or replace as necessary.

●

If NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.

CHECK A/C RELAY AFTER DISCONNECTING IT

Refer to

ATC-80, "A/C Relay"

OK or NG

>> Reconnect A/C relay. And GO TO 5.

>> 1. Replace A/C relay.

2. Go to

ATC-42, "FUNCTION CONFIRMATION PROCEDURE"

and perform self-diagnosis

STEP-4. Confirm that magnet clutch operation is usual.

Terminal

Voltage

(+)

(-)

Compressor

connector

Terminal No.

(Wire color)

E32

1 (L/R)

Ground

Battery voltage

RJIA0295E

Terminal

Continuity

(+)

(-)

A/C relay con-

nector

Terminal No.

(Wire color)

Compressor

connector

Terminal No.

(Wire color)

3 (L/R)

E32

1 (L/R)

Yes

RJIA0793E

Terminal

Voltage

(+)

(-)

A/C relay con-

nector

Terminal No.

(Wire color)

1 (L/Y)

Ground

Battery voltage

5 (L/Y)

RJIA0794E

TROUBLE DIAGNOSIS

ATC-77

ATC

CHECK COIL SIDE CIRCUIT OF A/C RELAY

OK or NG

>> GO TO 6.

>> Repair harness or connector.

CHECK AMBIENT SENSOR

Refer to

ATC-95, "Ambient Sensor Circuit"

OK or NG

●

With gasoline engine: GO TO 7.

●

With diesel engine: GO TO 8.

>> Repair or replace the malfunctioning part (s).

CHECK REFRIGERANT PRESSURE SENSOR (WITH QG ENGINE)

Refer to

ATC-80, "Refrigerant Pressure Sensor (With QG Engine)"

OK or NG

>> GO TO 8.

>> Repair or replace the malfunctioning part (s).

CHECK COMPRESSOR FEED BACK SIGNAL

OK or NG

>> GO TO 9.

>> GO TO 16.

Terminal

Continuity

(+)

(-)

A/C relay

connector

Terminal No.

(Wire color)

Smart

entrance con-

trol unit con-

nector

Terminal No.

(Wire color)

2 (L)

M100

41 (L)

Yes

RJIA0795E

Terminal

Condition

Voltage

(+)

(-)

Auto amp.

connector

Terminal No.

(Wire color)

M110

18 (BR/W)

Ground

A/C SW: ON

Approx. 0V

A/C SW: ON

(When refriger-

ant pressure sen-

sor connector is

disconnected)

Approx. 5V

RJIA0796E

ATC-78

TROUBLE DIAGNOSIS

CHECK FAN ON SIGNAL

OK or NG

>> GO TO 10.

●

If the voltage is approx. 5V when the blower fan is
ON: Replace the auto amp.

●

If the voltage is approx. 0V when the blower fan is OFF: GO TO 17.

10.

CHECK COMPRESSOR ON SIGNAL

OK or NG

>> GO TO 11.

●

If the voltage is approx. 5V when the A/C switch is
ON: Replace the auto amp.

●

If the voltage is approx. 0V when the A/C switch is OFF.

–

With gasoline engine: GO TO 18.

–

With diesel engine: GO TO 13.

11.

CHECK MULTIPLEX COMMUNICATION CIRCUIT

Refer to

ATC-104, "Multiplex Communication Circuit"

OK or NG

>> GO TO 12.

>> Repair harness or connector.

12.

CHECK CAN CIRCUIT

Refer to CAN communication. EL-459, "CAN COMMUNICATION".

OK or NG

>> INSPECTION END.

>> Repair or replace malfunctioning part (s).

Terminal

Condition

Voltage

(+)

(-)

Auto amp.

connector

Terminal No.

(Wire color)

M111

29 (LG/B)

Ground

Blower fan: ON

Approx. 0V

Blower fan: OFF

Approx. 5V

RJIA0797E

Terminal

Condition

Voltage

(+)

(-)

Auto amp.

connector

Terminal No.

(Wire color)

M111

22 (L/R)

Ground

A/C SW: ON

Approx. 0V

A/C SW: OFF

Approx. 5V

RJIA0798E

TROUBLE DIAGNOSIS

ATC-79

ATC

13.

CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND AUTO AMP. (WITH YD

ENGINE)

Disconnect dual-pressure switch connector and auto amp. connec-
tor.

OK or NG

>> GO TO 14.

>> Repair harness or connector.

14.

CHECK DUAL-PRESSURE SWITCH CIRCUIT (WITH YD ENGINE)

Refer to

ATC-81, "Dual-Pressure Switch (With YD Engine)"

OK or NG

>> GO TO 15.

>> Repair or replace malfunctioning part (s).

15.

CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND COMBINATION

METER (WITH YD ENGINE)

Disconnect combination meter connector.

OK or NG

>> Replace dual-pressure switch.

>> Repair harness or connector.

16.

CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP.

Disconnect combination meter connector and auto amp. connector.

OK or NG

>> GO TO 11.

>> Repair harness or connector.

Terminal

Continuity

(+)

(-)

Dual-pres-

sure switch

connector

Terminal No.

(Wire color)

Auto amp.

connector

Terminal No.

(Wire color)

E42

1 (L/R)

M111

22 (L/R)

Yes

RJIA1699E

Terminal

Continuity

(+)

(-)

Dual-pres-

sure switch

connector

Terminal No.

(Wire color)

Combination

meter connec-

tor

Terminal No.

(Wire color)

E42

2 (R/L)

M84

30 (PU)

Yes

RJIA2348E

Terminal

Continuity

(+)

(-)

Combination

meter connec-

tor

Terminal No.

(Wire color)

Auto amp.

connector

Terminal No.

(Wire color)

M84

7 (BR/W)

M110

18 (BR/W)

Yes

RJIA2349E

ATC-80

TROUBLE DIAGNOSIS

17.

CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP.

Disconnect combination meter connector and auto amp. connector.

OK or NG

>> GO TO 11.

>> Repair harness or connector.

18.

CHECK CIRCUIT CONTINUITY BETWEEN COMBINATION METER AND AUTO AMP. (WITH QG

ENGINE)

Disconnect combination meter connector and auto amp. connector.

OK or NG

>> GO TO 11.

>> Repair harness or connector.

COMPONENT INSPECTION
A/C Relay

Check continuity between terminal Nos. 3 and 5.

If NG, replace relay.

Refrigerant Pressure Sensor (With QG Engine)

The refrigerant pressure sensor is attached to the condenser.

Terminal

Continuity

(+)

(-)

Combination

meter connec-

tor

Terminal No.

(Wire color)

Auto amp.

connector

Terminal No.

(Wire color)

M84

29 (LG/B)

M111

29 (LG/B)

Yes

RJIA2350E

Terminal

Continuity

(+)

(-)

Combination

meter connec-

tor

Terminal No.

(Wire color)

Auto amp.

connector

Terminal No.

(Wire color)

M84

30 (L/R)

M111

22 (L/R)

Yes

RJIA2351E

Conditions

Continuity

12V direct current supply between terminal Nos. 1
and 2

Yes

No current supply

RHA638H

RHA272I

Almera Tino V10 (2003 year). Manual - part 38