AC temperature sensor MITSUBISHI 380 2005 Service Manual

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-84
5. Measure the resistance between the terminals of the EVAP
purge solenoid.
Standard value: 16
[at 20C )]
6. Replace the solenoid if resistance is out of specification.
MASS AIRFLOW SENSOR CHECKM1173050400053
To inspect these parts, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
M1173008100523
To inspect the sensor, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
INTAKE AIR TEMPERATURE SENSOR CHECKM1173008200263
To inspect the sensor, refer to GROUP 13A, Multipoint Fuel
Injection (MPI)
Multipoint Fuel Injection (MPI) Diagnosis
Diagnostic Trouble Code Chart 13A-17.
CATALYTIC CONVERTER
GENERAL DESCRIPTION (CATALYTIC CONVERTER)M1173005300131
The three way catalytic converter, together with the
closed loop air-fuel ratio control based on the oxygen
sensor signal, oxidizes carbon monoxides (CO) and
hydrocarbons (HC), also reduces nitrogen oxides
(NOx). When the mixture is controlled at stoichiometric
air-fuel ratio, the three way catalytic converter pro-
vides the highest purification against the three con-
stituents, namely, CO, HC and NOx.

AUTOMATIC TRANSMISSION23A-2
SPECIAL TOOLS . . . . . . . . . . . . . . . .23A-286
ON-VEHICLE SERVICE. . . . . . . . . . .23A-289
A/T CONTROL COMPONENT LAYOUT . . 23A-289
ESSENTIAL SERVICE . . . . . . . . . . . . . . . . 23A-291
TRANSMISSION FLUID CHECK . . . . . . . . 23A-291
TRANSMISSION FLUID CHANGE . . . . . . . 23A-292
OIL COOLER FLOW CHECK . . . . . . . . . . . 23A-294
TRANSMISSION RANGE SWITCH
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-294
TRANSMISSION RANGE SWITCH AND
CONTROL CABLE ADJUSTMENT. . . . . . . 23A-294
AUTOMATIC TRANSMISSION CONTROL
COMPONENT CHECK . . . . . . . . . . . . . . . . 23A-295
CRANKSHAFT POSITION SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-295
TRANSMISSION FLUID TEMPERATURE
SENSOR CHECK . . . . . . . . . . . . . . . . . . . . 23A-296
TRANSMISSION RANGE SWITCH
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-296
STOPLIGHT SWITCH CHECK . . . . . . . . . . 23A-296
A/T CONTROL RELAY CHECK . . . . . . . . . 23A-296
SOLENOID VALVE CHECK . . . . . . . . . . . . 23A-298SELECTOR LEVER OPERATION
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-299
TRANSMISSION CONTROL CABLE
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 23A-299
TRANSMISSION CONTROL* . . . . . . .23A-300
REMOVAL AND INSTALLATION . . . . . . . . 23A-300
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 23A-301
DISASSEMBLY AND ASSEMBLY . . . . . . . 23A-302
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 23A-303
TRANSMISSION ASSEMBLY . . . . . .23A-304
REMOVAL AND INSTALLATION . . . . . . . . 23A-304
TRANSMISSION FLUID COOLER,
HOSE AND PIPE . . . . . . . . . . . . . . . .23A-312
REMOVAL AND INSTALLATION . . . . . . . . 23A-312
SPECIFICATIONS . . . . . . . . . . . . . . .23A-313
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 23A-313
SERVICE SPECIFICATIONS . . . . . . . . . . . 23A-313
LUBRICANT . . . . . . . . . . . . . . . . . . . . . . . . 23A-314

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-13
A/T DIAGNOSTIC TROUBLESHOOTING STRATEGYM1231007600339
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will find most A/T mal-
functions.
1. Gather as much information as possible about the
complaint from the customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any A/T Diagnostic Trouble
Codes (DTCs).
4. If you can not verify the condition and there are no
DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
How
to Cope with Intermittent Malfunction P.00-14.
5. If you can verify the condition but there are no
DTCs, or the system can not communicate with
diagnostic tool, refer to the Symptom Chart
P.23A-35.6. If there is a DTC, record the number of the code,
then erase the code from memory using
diagnostic tool.
7. Reconfirm the symptom with a Road Test.
8. If a DTC is set again, go to the Inspection Chart
for Diagnostic Trouble Codes.
9. If a DTC is not set again, the malfunction is
intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
How to Cope with Intermittent
Malfunction P.00-14.
10.After repairs are completed, conduct a Road Test
duplicating the complaint conditions to confirm the
malfunction has been eliminated.
DIAGNOSTIC FUNCTIONM1231022500135
CHECK "N" RANGE LIGHT
The "N" range light flashes once per second if there is an
abnormality in any of the items in the table below which are
related to the A/T system. Check for diagnostic trouble codes if
the "N" range light is flashing once per second.
NOTE: The "N" indicator lamp warning function does not
operate with the selector lever in the "P" (PARK), "R"
(REVERSE) or "N" (NEUTRAL) position.
"N" range light flashing items
Input shaft speed sensor
Output shaft speed sensor
Each solenoid valve
Gear incorrect ratio
A/T control relay system
If the "N" range light is flashing rapidly (twice per second),
the transmission fluid temperature is too high. (It flashes
when the fluid is approximately 125
C or more and goes
off when the fluid is approximately 115
C or less)
ON-BOARD DIAGNOSTICS
The automatic transmission -electronic control unit
(A/T-ECU) monitors its input/output signals (some
signals all the time and others under specified condi-
tions). When an irregular signal is initially monitored,
the A/T-ECU decides that a malfunction has
occurred and records the occurrence as a diagnostic
trouble code. The diagnostic results can be read with diagnostic tool. Diagnostic trouble codes are kept in
memory by direct battery feed. The codes are
retained in memory even if the ignition switch is in
the "LOCK" (OFF) position. DTCs are not erased
even after the battery terminals and the A/T-ECU
connector are disconnected. In addition, the diagnos-
tic trouble code can also be erased by diagnostic
tool.

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-19
ROAD TESTM1231007800407
Check using the following procedures.
STEP CONDITION
BEFORE
TEST/OPERATIONTEST/OPERATION STANDARD INSPECTION
ITEMINSPECTION
PROCEDURE
PA G E
1 Ignition switch:
(LOCK) OFFIgnition switch
(1) ONData list No.8
(1) Control Relay
Voltage [V]A/T Control
relay
output
voltageA/T Control
relay system
(P.23A-207).
2 Ignition switch:
ON
Engine: Stopped
Transmission
range: PTransmission range
(1) P, (2) R, (3) N, (4)
DData list No.34
(1) P, (2) R, (3) N, (4)
DTransmissi
on range
switchTransmission
range switch
system
(P.23A-97,
P.23A-119).
Transmission range
(1) D (1st gear)
(2) Select the sport
mode (1st gear)
(3) Upshift and hold
the selector lever in
that position (2nd
gear)
(4) Downshift and
hold the selector
lever in that position
(1st gear)Data list No.27
(1) OFF, (2) ON, (3)
ON, (4) ON
Data list No.28
(1) OFF, (2) OFF, (3)
ON, (4) OFF
Data list No.29
(1) OFF, (2) OFF, (3)
OFF, (4) ONSelect
switch and
Shift switchShift switch
assembly
system
(P.23A-252).
Brake pedal
(1) Depressed
(2) ReleasedData list No.19
(1) ON
(2) OFFSto pl amp
switchSt o pla mp
switch system
(P.23A-89).
3 Ignition switch:
ST
Engine: StoppedCranking test with
lever in P or N rangeCranking should be
possibleCranking Engine does
not crank
(P.23A-218).
4 Engine warming
upDrive for 15 minutes
or more so that the
transmission fluid
temperature
becomes 70
90CData list No.7
Gradually rises to 70
90CTransmissi
on fluid
temperatur
e sensorTransmission
fluid
temperature
sensor system
(P.23A-36,
P.23A-47).
5 Engine: Idling
Transmission
range: NBrake pedal (Retest)
(1) Depressed
(2) ReleasedData list No.19
(1) ON
(2) OFFSto pl amp
switchSt o pla mp
switch system
(P.23A-89).
Transmission range
(1) N
D
(2) N
RShould be no
abnormal shift
shocks
Time delay when
engaging should be
within 2 secondsMalfunction
when
startingEngine stalls
when moving
selector lever
from N to D or
N to R
(P.23A-227).

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-25
TORQUE CONVERTER STALL TESTM1231005400362
This test measures the maximum engine speed when the
selector lever is in the "D" or "R" position and the torque con-
verter stalls. This tests the operation of the torque converter,
starter motor and one-way clutch operation, as well as the hold-
ing performance of the clutches and brakes in the transmission.
Do not let anyone stand in front of or behind the vehi-
cle while this test is performed.
1. Check the transmission fluid level and temperature. Check
the engine coolant temperature.
Transmission fluid level: At the "HOT" mark on the dipstick
Transmission fluid temperature: 70 80C
Engine coolant temperature: 80 100C
NOTE: Measures transmission fluid temperature with
diagnostic tool MB991958 (MUT-III sub assembly).
2. Check both rear wheels.
3. Pull the parking brake lever on, with the brake pedal fully
depressed.
4. Start the engine. 9 Transmission
range: N (on a
flat and straight
road)Monitor data list
No.22 and No.23
with the diagnostic
tool MB991958
(MUT-III sub
assembly)
(1) Move selector
lever to R range,
drive at constant
speed of 10 km/hThe ratio between
data list No.22 and
No.23 should be the
same as the gear
ratio when reversing.Does not
shiftInput shaft
speed sensor
system
(P.23A-55).
Output shaft
speed sensor
system
(P.23A-72).
Reverse gear
incorrect ratio
(P.23A-196).
STEP CONDITION
BEFORE
TEST/OPERATIONTEST/OPERATION STANDARD INSPECTION
ITEMINSPECTION
PROCEDURE
PA G E

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-34
DIAGNOSTIC TROUBLE CODE CHARTM1231007900330
During diagnosis, a DTC code associated with
other system may be set when the ignition switch
is turned on with connector(s) disconnected. On
completion, confirm all systems for DTC code(s).
If DTC code(s) are set, erase them all.
NOTE: The A/T diagnostic trouble codes are the codes which are set when item "A/T" is selected on
diagnostic tool MB991958 (MUT-III sub assembly). However, the some codes above indicate failure in the
MPI system.A/T DTC
NO.DIAGNOSIS ITEM REFERENCE
PA G E
P0713 Transmission fluid temperature sensor system Open circuit
P.23A-36
P0712 Short circuit
P.23A-47
P0715 Input shaft speed sensor system Short circuit/open circuit
P.23A-55
P0720 Output shaft speed sensor system Short circuit/open circuit
P.23A-72
Stoplamp switch systemShort circuit
P.23A-89
P0705 Transmission range switch system Open circuit
P.23A-97
Short circuit
P.23A-119
P0753 Low-reverse solenoid valve system Short circuit/open circuit
P.23A-133
P0758 Underdrive solenoid valve system Short circuit/open circuit
P.23A-144
P0763 Second solenoid valve system Short circuit/open circuit
P.23A-154
P0768 Overdrive solenoid valve system Short circuit/open circuit
P.23A-164
P0773 Reduction (RED) solenoid valve system Short circuit/open circuit
P.23A-174
P0743 Damper clutch control (DCC) solenoid valve
systemShort circuit/open circuit
P.23A-185
P0731 1st gear incorrect ratio
P.23A-196
P0732 2nd gear incorrect ratio
P.23A-196
P0733 3rd gear incorrect ratio
P.23A-196
P0734 4th gear incorrect ratio
P.23A-196
P0735 5th gear incorrect ratio
P.23A-196
P0736 Reverse gear incorrect ratio
P.23A-196
P0741 Damper clutch control (DCC) system Defective system
P.23A-201
P0742 Clutch stuck on
P.23A-204
P1751 A/T control relay system Short circuit to ground/open
circuitP.23A-207

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-36
DIAGNOSTIC TROUBLE CODE PROCEDURES
(P0713): Transmission Fluid Temperature Sensor System (Open Circuit)
.
CIRCUIT OPERATION
The A/T-ECU connector B-22 (terminal 6) applies
5 volts to the transmission fluid temperature sen-
sor output terminal (terminal 1).
The transmission fluid temperature sensor circuit
is grounded to the A/T-ECU connector B-22 (ter-
minal 12).
When the transmission fluid temperature is cold,
the transmission fluid temperature sensor resis-
tance is high. When the transmission fluid tem-
perature is hot, the transmission fluid
temperature sensor resistance is low.
.
DTC SET CONDITIONS
Check Conditions
Engine speed: 1,000 r/min or more.
Output speed: 1,000 r/min or more.
Accumulated time in above condition: 10 min-
utes.
Judgement Criteria
Transmission fluid temperature sensor voltage:
4.5 volts or more. (1 second)
.
OBD-II DRIVE CYCLE PATTERN
Start the engine, drive at 60 km/h or more for 15 min-
utes in total.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
Malfunction of the transmission fluid temperature
sensor circuit
Damaged harness or connector
Malfunction of the A/T-ECUCircuit drawings
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Refer to component locations GROUP-70
DIAGNOSIS
Required Special Tool:
MB991958: Diagnostic Tool (MUT-III Sub Assembly)
MB991824: V.C.I.
MB991827: MUT-III USB Cable
MB991910: MUT-III Main Harness A

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-37
STEP 1. Using diagnostic tool MB991958, check data list
item 7: Transmission Fluid Temperature Sensor.
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958 to the data link
connector.
(2) Start the engine.
(3) Set diagnostic tool MB991958 to the data reading mode.
Item 7: Transmission Fluid Temperature Sensor.
When the engine is cool: Diagnostic tool display is
almost equal to the ambient temperature (atmo-
spheric temperature)
NOTE: Set diagnostic tool MB991958 to the Engine
MPI data list reading mode for item number 5, Intake
Air Temperature (IAT) Sensor and note the tempera-
ture measurement. When the engine is cool, the
temperature should be almost equal to the ambient
temperature (atmospheric temperature), and the IAT
sensor measurement should be approximately the
same as the Transmission Fluid Temperature Sen-
sor.
When the engine is warm, at approximately running
temperature: 70
80C.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
How to
Cope with Intermittent Malfunction P.00-14.
NO : Go to Step 2.

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-38
STEP 2. Measure the sensor output voltage at the A/T
control solenoid valve assembly connector B-108 by
backprobing.
(1) Do not disconnect connector B-108.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground by
backprobing.
When transmission fluid temperature is 20C, voltage
should measure between 3.8 and 4.0 volts.
When transmission fluid temperature is 40C, voltage
should measure between 3.2 and 3.4 volts.
When transmission fluid temperature is 80C, voltage
should measure between 1.7 and 1.9 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?
YES : Go to Step 6.
NO : Go to Step 3.
STEP 3. Measure the ground voltage at the A/T control
solenoid valve assembly connector B-108 by backprobing.
(1) Do not disconnect connector B-108.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground by
backprobing.
The voltage should measure 0.5 volt or less.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?
YES : Go to Step 4.
NO : Go to Step 7.

AUTOMATIC TRANSMISSION DIAGNOSIS
AUTOMATIC TRANSMISSION23A-40
STEP 5. Check the transmission fluid temperature sensor
at A/T control solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the sensor
side.
(2) Measure the resistance between terminal 1 and 2.
When transmission fluid temperature is 0C (32F),
resistance should be between 16.7 and 20.5 k
.
When transmission fluid temperature is 20C (68F),
resistance should be between 7.3 and 8.9 k
.
When transmission fluid temperature is 40C (104F),
resistance should be between 3.4 and 4.2 k
.
When transmission fluid temperature is 60C (140F),
resistance should be between 1.9 and 2.2 k
.
When transmission fluid temperature is 80C (176F),
resistance should be between 1.0 and 1.2 k
.
When transmission fluid temperature is 100C (212F),
resistance should be between 0.57 and 0.69 k
.
Q: Is the measured resistance within the specified range?
YES : Go to Step 6.
NO : Replace the transmission fluid temperature sensor.
Refer to GROUP 23B, Transmission P.23B-13.