Almera Tino V10 (2003 year). Manual — part 38
TROUBLE DIAGNOSIS
ATC-65
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B
ATC
Intake Door Motor Circuit
EJS0030F
SYMPTOM:
●
Intake door does not change.
●
Intake door motor does not operate normally.
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 Circuit"
*6
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*7
*8
ATC-66, "COMPONENT DESCRIP-
TION"
*9
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
*12
*13
ATC-103, "Intake Sensor Circuit"
RJIA0781E
RJIA0782E
TROUBLE DIAGNOSIS
ATC-67
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A
B
ATC
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to
.
RJIA0783E
ATC-68
TROUBLE DIAGNOSIS
Blower Motor Circuit
EJS0030G
SYMPTOM:
●
Blower motor operation is malfunctioning.
●
Blower motor operation is malfunctioning under out of starting fan speed control.
INSPECTION FLOW
RJIA1696E
TROUBLE DIAGNOSIS
ATC-69
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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.
*1
ATC-41, "Self-diagnosis Function"
*2
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No.14.
*3
ATC-70, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR"
*4
*5
*6
QG engine (With EURO–OBD):
188, "DTC P0117, P0118 ECT SEN-
SOR"
QG engine (Without EURO–OBD):
EC-660, "DTC P0117, P0118 ECT
SENSOR"
YD engine:
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
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ATC
1.
CHECK POWER SUPPLY FOR BLOWER MOTOR
Disconnect blower motor harness connector.
OK or NG
OK
>> GO TO 2.
NG
>> 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.
2.
CHECK FAN FEED BACK CIRCUIT
OK or NG
OK
>> GO TO 3.
NG
>> Repair harness or connector.
3.
CHECK BLOWER MOTOR
Refer to
ATC-73, "COMPONENT INSPECTION"
.
OK or NG
OK
>> GO TO 4.
NG
>> Replace blower motor.
4.
CHECK POWER SUPPLY FOR FAN CONTROL AMP.
1.
Reconnect blower motor connector.
2.
Disconnect fan control amp. harness connector.
OK or NG
OK
>> GO TO 5.
NG
>> 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
5.
CHECK GROUND CIRCUIT FOR FAN CONTROL AMP.
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connector.
6.
CHECK FOR AUTO AMP. OUTPUT
Reconnect the fan control amp. harness connector.
OK or NG
OK
>> GO TO 9.
NG
>>
●
If the voltage is less than 2.5V: GO TO 8.
●
If the voltage is more than 9.0V: GO TO 7.
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
OK
>> Replace fan control amp.
NG
>> Repair harness or connector.
8.
CHECK FAN CONTROL AMP.
Disconnect the fan control amp. harness connector.
OK or NG
OK
>> GO TO 9.
NG
>> 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
2
M90
1
Yes
RJIA0530E
TROUBLE DIAGNOSIS
ATC-73
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ATC
9.
CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND FAN CONTROL AMP.
OK or NG
OK
>> Replace auto amp.
NG
>> 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
ATC-74
TROUBLE DIAGNOSIS
Magnet Clutch Circuit
EJS0030H
SYMPTOM: Magnet clutch does not engage.
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 Circuit"
*6
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*7
ATC-75, "DIAGNOSTIC PROCE-
DURE FOR MAGNET CLUTCH"
*8
ATC-87, "TROUBLE DIAGNOSES
FOR UNUSUAL PRESSURE"
*9
*10
ATC-42, "FUNCTION CONFIRMA-
TION PROCEDURE"
see No.5 or 7.
*11
*12
ATC-103, "Intake Sensor Circuit"
RJIA1697E
TROUBLE DIAGNOSIS
ATC-75
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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
−
2
°
C (28
°
F), the com-
pressor turns ON. The compressor turns OFF when ambient temper-
atures are less than
−
5
°
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
1.
CHECK POWER SUPPLY FOR COMPRESSOR
Disconnect compressor harness connector.
OK or NG
OK
>> Check magnet clutch coil.
1. If NG, replace magnet clutch. Refer to
.
2. Go to
ATC-42, "FUNCTION CONFIRMATION PROCEDURE"
and perform self-diagnosis
STEP-4. Confirm that magnet clutch operation is usual.
NG
>> Disconnect A/C relay. And GO TO 2.
2.
CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND COMPRESSOR
OK or NG
OK
>> Check harness for short. And GO TO 3.
NG
>> Repair harness or connector.
3.
CHECK POWER SUPPLY FOR A/C RELAY
Disconnect A/C relay.
OK or NG
OK
>> GO TO 4.
NG
>> 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.
4.
CHECK A/C RELAY AFTER DISCONNECTING IT
Refer to
.
OK or NG
OK
>> Reconnect A/C relay. And GO TO 5.
NG
>> 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)
E9
3 (L/R)
E32
1 (L/R)
Yes
RJIA0793E
Terminal
Voltage
(+)
(-)
A/C relay con-
nector
Terminal No.
(Wire color)
E9
1 (L/Y)
Ground
Battery voltage
E9
5 (L/Y)
RJIA0794E
TROUBLE DIAGNOSIS
ATC-77
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ATC
5.
CHECK COIL SIDE CIRCUIT OF A/C RELAY
OK or NG
OK
>> GO TO 6.
NG
>> Repair harness or connector.
6.
CHECK AMBIENT SENSOR
Refer to
ATC-95, "Ambient Sensor Circuit"
.
OK or NG
OK
>>
●
With gasoline engine: GO TO 7.
●
With diesel engine: GO TO 8.
NG
>> Repair or replace the malfunctioning part (s).
7.
CHECK REFRIGERANT PRESSURE SENSOR (WITH QG ENGINE)
Refer to
ATC-80, "Refrigerant Pressure Sensor (With QG Engine)"
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace the malfunctioning part (s).
8.
CHECK COMPRESSOR FEED BACK SIGNAL
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 16.
Terminal
Continuity
(+)
(-)
A/C relay
connector
Terminal No.
(Wire color)
Smart
entrance con-
trol unit con-
nector
Terminal No.
(Wire color)
E9
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
9.
CHECK FAN ON SIGNAL
OK or NG
OK
>> GO TO 10.
NG
>>
●
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
OK
>> GO TO 11.
NG
>>
●
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
OK
>> GO TO 12.
NG
>> Repair harness or connector.
12.
CHECK CAN CIRCUIT
Refer to CAN communication. EL-459, "CAN COMMUNICATION".
OK or NG
OK
>> INSPECTION END.
NG
>> 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
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A
B
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
OK
>> GO TO 14.
NG
>> 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
OK
>> GO TO 15.
NG
>> 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
OK
>> Replace dual-pressure switch.
NG
>> 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
OK
>> GO TO 11.
NG
>> 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
OK
>> GO TO 11.
NG
>> 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
OK
>> GO TO 11.
NG
>> 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
No
RHA638H
RHA272I
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