Mitsubishi Outlander (2003+). Manual — part 181
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-19
DIAGNOSTIC TROUBLE CODE
PROCEDURES
Code No.15: A/T fluid temperature sensor system
OPERATION
•
The A/T fluid temperature sensor converts the
automatic fluid temperature to voltage, and send
the information to the engine-A/T-ECU.
•
The A/T fluid temperature rises, the resistance
decreases. Thus, the sensor output voltage
depends on the automatic fluid temperature. As
the A/T fluid temperature rises, the output voltage
will decrease.
diagnosis code set conditions
If the A/T fluid temperature sensor output voltage is
4.5 volts or more after driving for 10 minutes or more,
there is an open circuit in the A/T fluid temperature
sensor and diagnosis code 15 is set.
Possible causes
•
Malfunction of the A/T fluid temperature sensor
•
Damaged harness wires and connectors
•
Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. MUT-II/III data list
Item 15: A/T fluid temperature sensor (Refer to Data
List Table
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
−
How to Cope with Intermittent
Malfunction
).
NO :
Go to Step 2.
ENGINE-
A/T-ECU
A/T CONTROL
SOLENOID
VALVE ASSEMBLY
A/T
FLUID
TEMPERATURE
SENSOR
Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet
AC309562 AC
A/T fluid temperature sensor system circuit
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-20
STEP 2. Measure the resistance at A/T control
solenoid valve assembly connector B-34.
Disconnect the connector, and measure the
resistance between terminal 1 and 2 at the sensor
side.
OK:
•
16.7
−
20.5 k
Ω
(at 0
°
C)
•
7.3
−
8.9 k
Ω
(at 20
°
C)
•
3.4
−
4.2 k
Ω
(at 40
°
C)
•
1.9
−
2.2 k
Ω
(at 60
°
C)
•
1.0
−
1.2 k
Ω
(at 80
°
C)
•
0.57
−
0.69 k
Ω
(at 100
°
C)
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the A/T fluid temperature sensor.
STEP 3. Connector check: B-34 A/T control
solenoid valve assembly
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
STEP 4. Measure the resistance at A/T control
solenoid valve assembly connector B-34.
Disconnect the connector, and measure the
resistance between terminal 2 and earth at the wiring
harness side.
OK: 2
Ω
or less
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 5.
STEP 5. Measure the voltage at engine-A/T-ECU
connector C-142.
(1) Connect A/T control solenoid valve assembly
connector B-34.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between engine-A/T-ECU
connector C-142 terminal No.96 and earth.
OK: 0.5 V or less
Q: Is the check result normal?
AC309511AC
B-34 (GR)
Connector: B-34
Sensor side
AC309511
B-34 (GR)
Harness side
AB
Connector: B-34
AC309511
B-34 (GR)
Harness side
AB
Connector: B-34
AC309479
Engine-A/T-ECU
Harness side
Engine-A/T-ECU
C-142 (GR)
C-142 (GR)
104
93
95
98
92
94
96
97
99
100
91
103
110
111
101
108
109
105
107
106
102
115
117
112
118
116
114 113
120 119
AF
Connector: C-142 <LHD>
Connector: C-142 <RHD>
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-21
YES :
Go to Step 8.
NO :
Go to Step 6.
STEP 6. Connector check: C-142 engine-A/T-ECU
connector
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
STEP 7. MUT-II/III data list
Item 15: A/T fluid temperature sensor (Refer to Data
List Table
Q: Is the check result normal?
YES :
Intermittent malfunction (Refer to GROUP
00
−
How to Cope with Intermittent
Malfunction
NO :
Replace the engine-A/T-ECU.
STEP 8. Connector check: C-142 engine-A/T-ECU
connector
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 14.
NO :
Repair the defective connector.
STEP 9. Measure the voltage at A/T control
solenoid valve assembly connector B-34.
(1) Disconnect the connector, and measure the
voltage between terminal 1 and earth at the
wiring harness side.
(2) Turn the ignition switch to the ON position.
OK: 4.5
−
4.9 V
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Go to Step 10.
AC309479
Engine-A/T-ECU
Harness side
Engine-A/T-ECU
C-142 (GR)
C-142 (GR)
104
93
95
98
92
94
96
97
99
100
91
103
110
111
101
108
109
105
107
106
102
115
117
112
118
116
114 113
120 119
AF
Connector: C-142 <LHD>
Connector: C-142 <RHD>
AC309479
Engine-A/T-ECU
Harness side
Engine-A/T-ECU
C-142 (GR)
C-142 (GR)
104
93
95
98
92
94
96
97
99
100
91
103
110
111
101
108
109
105
107
106
102
115
117
112
118
116
114 113
120 119
AF
Connector: C-142 <LHD>
Connector: C-142 <RHD>
AC309511
B-34 (GR)
Harness side
AB
Connector: B-34
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-22
STEP 10. Measure the voltage at engine-A/T-ECU
connector C-142.
(1) Connect A/T control solenoid valve assembly
connector B-34.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between engine-A/T-ECU
connector C-142 terminal No.119 and earth.
OK:
•
3.8
−
4.0 V (at 20
°
C)
•
3.2
−
3.4 V (at 40
°
C)
•
1.7
−
1.9 V (at 80
°
C)
Q: Is the check result normal?
YES :
Go to Step 12.
NO :
Go to Step 11.
STEP 11. Connector check: C-142
engine-A/T-ECU connector
Check for the contact with terminals.
Q: Is the check result normal?
YES :
Go to Step 7.
NO :
Repair the defective connector.
AC309479
Engine-A/T-ECU
Harness side
Engine-A/T-ECU
C-142 (GR)
C-142 (GR)
104
93
95
98
92
94
96
97
99
100
91
103
110
111
101
108
109
105
107
106
102
115
117
112
118
116
114 113
120 119
AF
Connector: C-142 <LHD>
Connector: C-142 <RHD>
AC309479
Engine-A/T-ECU
Harness side
Engine-A/T-ECU
C-142 (GR)
C-142 (GR)
104
93
95
98
92
94
96
97
99
100
91
103
110
111
101
108
109
105
107
106
102
115
117
112
118
116
114 113
120 119
AF
Connector: C-142 <LHD>
Connector: C-142 <RHD>
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