2007 KIA CARNIVAL coolant temperature

2007 > 2.7L V6 GASOLINE >
INSPECTION
FUNCTION AND OPERATION PRICIPLE
Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for
detecting the engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the
temperature. The electrical resistance of the ECTS decreases as the temperature increases, and increases as the
temperature decreases. The reference 5 V in the PCM is supplied to the ECTS via a resistor in the PCM.That is, the
resistor in the PCM and the thermistor in the ECTS are connected in series. When the resistance value of the
thermistor in the ECTS changes according to the engine coolant temperature, the output voltage also changes. During
cold engine operation the PCM increases the fuel injection duration and controls the ignition timing using the
information of engine coolant temperature to avoid engine stalling and improve drivability.
SPECIFICATION
Temperature Resistance(kΩ)
°C °F
- 40 - 4048.14
- 20 -414.13 ~ 16.83
0 325.79
20 682.31 ~ 2.59
40 104 1.15
60 140 0.59
80 176 0.32
CIRCUIT DIAGRAM

Input signals to TCM(PCM) through ‘CAN communication’
- Engine rpm, TPS signal
- A/CON signal, Engine coolant temperature
- Quantity of intake airflow, Vehicle speed
- Shift holding signal (FTCS ON)
Output signals from TCM(PCM) through ‘CAN communication’
- Request signal for torque reduction
- ATF temperature, TCM(PCM) type, TCM(PCM) error or not
- Damper clutch ON, OFF / Gear position
TCM PIN DESCRIPITION
PIN
No.Check item
Condition Input/Output value
Measurement
Value Remarks
Type Level
A01 2nd CAN_HI -- - --
A02 2nd CAN_LO -- - --
A03 P Range
Selection P Position
OtherwiseDC
Voltage V_BAT
Max. 1.0V 12.9V
0V
A04 R Range
Selection R Position
Otherwise DC
Voltage V_BAT
Max. 1.0V 12.3V
0V
A05 N Range
Selection N Position
Otherwise DC
Voltage V_BAT
Max. 1.0V 13.2V
0V
A06 D Range
Selection D Position
Otherwise DC
Voltage V_BAT
Max. 1.0V 13.2V
0V
A07 Select Position -DC
Voltage V_BAT
Max. 1.0V 13.2V
0V
A08 Up Position -DC
Voltage V_BAT
Max. 1.0V 13.2V
0V
A09 Down Position -DC
Voltage V_BAT
Max. 1.0V 13.2V
0V
A12 N.A -- - -
A14 N.A -- - -
A19 N.A -- - -
A20 A/T Control Relay Relay On
Relay Off
DC
Voltage V_BAT
Max. 1.0V
Vpeak : Max. 70V
Resistance : 680Ω 13.8V
0V
- 0.7V
Resistance : 680Ω
W/H Open DTC Spec : P0890DTC : P0890
A27 Diagnosis "K" Communicated with
GST Pulse At transmitting
HI : V_BAT* 80%↑
LO : V_BATÎ20%↓ AT receiving
HI : V_BAT* 70%↑
LO : V_BAT*30%↓ 11.3V
0.14/ 0.32V V_BAT :
13.2V

6c.
Driving at constant
speed of 30 km/h in 2nd
gear
d. Driving at 50 km/h in 3rd
gear with accelerator
fully closed
e. Driving at constant
speed of 50 km/h in 4th
gear (1) 100%, (2) 0%, (3)
100%
Second solenoid valve
(2) 100%, (3) 100%,
(4) 0% Overdrive solenoid valve
(1) 0km/h
(4) 50km/h Vehicle speed sensor
(4) 1,800 ~ 2,100rpm Input shaft speed sensor
(4) 1,800 ~ 2,100rpm Output shaft speed sensor
7 Selector lever position
: D (Carry out on a
flat and straight road)
a.
Accelerate to 4th gear at
a throttle position sensor
output of 1.5V
(accelerator opening
angle of 30 %).
b. Gently decelerate to a
standstill.
c. Accelerate to 4th gear at
a throttle position sensor
output of 2.5 V
(accelerator opening
angle of 50%).
d. While driving at 60 km/h
in 4th gear, shift down
to 3rd gear.
e. While driving at 40 km/h
in 3rd gear, shift down
to 2nd gear.
f. While driving at 20 km/h
in 2nd gear, shift down
to 1st gear. For (1), (2) and (3),
the reading should be
the same as the
specified output shaft
torque, and no
abnormal shocks
should occur.
For (4), (5) and (6),
downshifting should
occur immediately
after the shifting
operation is made.
Malfunction when shifting
Displaced shift points
Does not shift
Does not shift from 1 to 2 or
2 to 1
Does not shift from 2 to 3 or
3 to 2
Does not shift from 3 to 4 or
4 to 3
8 Selector lever position
: N (Carry out on a
flat and straight road)
Move selector lever to R
range drive at constant
speed of 10km/h The ratio between
input and output shaft
speed sensor data
should be the same
as the gear ratio
when reversing.Does not shift
TORQUE CONVERTER STALL TEST
This test measures the maximum engine speed when the selector lever is in the D or R position. The torque converter
stalls to test the operation of the torque converter, starter motor, one- way clutch operation, the holding performance of
the clutches, and brakes in the transaxle.
Do not let anybody stand in front of or behind the vehicle while this test is being carried out
1. Check the automatic transmission fluid level and temperature, and the engine coolant temperature.
a. Fluid level : At the HOT mark on the oil level gauge
b. Fluid temperature : 80~100°C (176~212°F)
c. Engine coolant temperature : 80~100°C(176~212°F)
2. Prevent all the wheels from moving during the test.
3. Pull the parking brake lever up, with the brake pedal fully depressed.
4. Start the engine.

2007 > 2.7L V6 GASOLINE >
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant
charge, air flow or compressor.
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of
the problem. Check each part in order. If necessary, replace these parts.
After correcting the malfunction, check the complete system to ensure that performance is satisfactory.
STANDARD:
Symptom Suspect Area See page
No blower operation 1. Blower fuse
2. Blower relay
3. Blower motor
4. Power mosfet
5. Blower speed control switch
6. Wire harness
No air temperature control 1. Engine coolant capacity
2. Heater control assembly
No compressor operation 1. Refrigerant capacity
2. A/C Fuse
3. Magnetic clutch
4. Compressor
5. Dual pressure switch
6. A/C switch
7. Evaporator temperature sensor
8. Wire harness
No cool comes out 1. Refrigerant capacity
2. Refrigerant pressure
3. Drive belt
4. Magnetic clutch
5. Compressor
6. Dual pressure switch
7. Evaporator temperature sensor
8. A/C switch
9. Heater control assembly
10. Wire harness
Insufficient cooling 1. Refrigerant capacity
2. Drive belt
3. Magnetic clutch
4. Compressor
5. Condenser
6. Expansion valve
7. Evaporator
8. Refrigerant lines
9. Dual pressure switch
10. Heater control assembly
No engine idle - up when A/C switch
ON 1. Engine ECM
2. Wire harness
No air inlet control 1. Heater control assembly
No mode control 1. Heater control assembly
2. Mode actuator
No cooling fan operation 1. Cooling fan fuse
2. Fan motor
3. Engine ECM
4. Wire harness

2007 > 2.7L V6 GASOLINE >
DESCRIPTION
1.Water temperature sensor is located at the heater unit.
2. It detects coolant temperature. Its signal is used for cold engine lockout control. When the driver operates the
heater before the engine is warmed up, the signal from sensor causes the heater control unit to reduce blower
motor speed until coolant temperature reaches the threshold value.

2007 > 2.7L V6 GASOLINE >
INSPECTION
1.Ignition "ON"
2. Using the multi- tester, Measure resistance between terminal "1" and "2" of water temperature sensor.
Specification
Coolant temperature [°C(°F)] Resistance (kΩ)Voltage (V)
- 10(14) 55.85 ± 3% 4.24 ± 3%
0(32) 32.91 ± 3% 3.83 ± 3%
10(50) 19.99 ± 3% 3.33 ± 3%
20(68) 12.51 ± 3% 2.78 ± 3%
30(86) 8.047 ± 3% 2.23 ± 3%
40(104) 5.311 ± 3% 1.73 ± 3%
50(122) 3.588 ± 3% 1.32 ± 3%
60(140) 2.476 ± 3% 0.99 ± 3%
70(158) 1.742 ±3% 0.74 ± 3%
80(176) 1.246 ± 3% 0.55 ± 3%
3. If the measured resistance is not specification, substitute with a known- good water temperature sensor and check
for proper operation.
4. If the problem is corrected, replace the water temperature sensor.
Negative type thermistor that resistance will rise with lower temperature, and reduce with higher temperature.
REPLACEMENT
1.Disconnect the negative ( - ) battery terminal.
2. Remove the grove box. (Refer to BD group)
3. Disconnect the connector (B) of water temperature sensor and then remove the water temperature sensor(A) by
pulling out.

2007 > 2.7L V6 GASOLINE >
REPLACEMENT
1.Disconnect the negative ( - ) battery terminal.
2. Recover the refrigerant with a recovery/ recycling/ charging station. (Refer to HA - 8)
3. When the engine is cool, drain the engine coolant from the radiator.
4. Remove the bolts (A) and the expansion valve (B) from the evaporator core.
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
5.Disconnect the inlet (A) and outlet (B) heater hoses from the heater unit.
Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let
coolant spill on electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
6. Remove the crash pad (Refer to BD group).
7. Remove the cowl cross bar assembly. (Refer to BD group)
8. Disconnect the connectors from the temperature control actuator, the mode control actuator and the evaporator
temperature sensor.
9. Remove the heater & blower unit after loosening 3 mounting bolts.

2007 > 2.7L V6 GASOLINE >
DESCRIPTION
The fuel fired heater has been applied to the diesel engine (CRDi) to increase heating capability by using diesel only in
cold weather
a.Follow the procedures specified in this bulletin during service or it may cause personal injury.
b. Be sure to turn the fuel fired heater off when refueling at station.
c. The fuel fired heater must be mounted at designated position, never in the passenger compartment.
d. The fuel fired heater must be kept below 120°C or a permanent failure on the components may occur.
e. Operational principle : The following 3 conditions should be met at the same time for automatic operation of
the fuel fired heater.
a. Engine runs.
b. Ambient temperature is lower than 2°C (Winter)
c. Coolant temperature is lower than 68°C
f. Cleaning process
a. A cleaning process of the fuel fired heater will be performed automatically when the heater is not operated
due to increase of coolant temperature and ignition off.
b. During cleaning process, supplied fuel in the heater will be burnt completely and any smoke will be expelled.
It is a necessary process for next operation and durability of the heater and takes about 3 minutes.
g. Others
The following symptoms should be explained to customers or technicians as a normal occurrence.
a. A white smoke may come out from the fuel fired heater exhaust pipe installed at the front side of the right
front tire during operation of the heater.
This is not an exhaust fumes.
When moisture in the fuel and air is discharged from the heater and is met cold ambient air, it is condensed
and looks like a white smoke however, when an excessive black smoke is discharged, the fuel fired heater
should be inspected.
b. A "buk- buk" noise from the heater is a noise to form flame for combustion. This is a normal operation.
c. When the heater is operated at full load, a "Wooing" noise is occurred.
d. When shutting off the engine during heater operation, a "Wing" noise is occurred to perform the cleaning
process.
OVERVIEW
1.This fuel fired heater supplies additional heat to the interior compartment with a low fuel consumption to
compensate the heat provided by engine alone.
2. The fuel fired heater has been adopted to warm up the interior compartment in a short time.