Mitsubishi MOTORS L200 1996, Руководство по ремонту

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AUTOMATIC AIR CONDITIONER
–
Troubleshooting
55B-18
CHECK AT A/C-ECU TERMINALS
Termi-
nal No. Check item Check conditions Normal condition
1 Power transistor collector output
When blower switch OFF position System voltage
When blower switch LO position Approximately 7V
When blower switch HI position Faint voltage (0.5 V)
2 Power transistor base output
When blower switch OFF position 0 V
When blower switch LO position Approximately 1.3V
When blower switch HI position Approximately 2.5V
3 Backup power supply At all times System voltage
4 Input from heater water temperature
sensor When sensor temperature: 25
_
C (4 k
Ω
) 2.3 – 2.9 V
5 Input to air mixing damper control
potentiometer When the damper is moving to the
MAX. HOT position 4.7 – 5.0 V
6 Input to mode selection damper control
potentiometer When the damper flap is moving to the
DEF position 4.8 – 5.2 V
7 Input from ambient temperature sensor When sensor temperature: 25
_
C (4 k
Ω
) 2.3 – 2.9 V
8 Input from air thermo sensor Sensor temperature: 25
_
C (4 k
Ω
) 2.3 – 2.9 V
9 Photo sensor (–)
Illuminance 1000 lux 5.0 – 7.6 mV
( )
Illuminance 100 lux 0.5 – 0.76 mV
10 Sensor power supply At all times 4.8 – 5.2 V
12 Blower high speed relay Blower switch: HI 1.5V or less g y
Blower switch: except HI System voltage
13 Earth At all times Continuity
16 Power supply to ignition switch (IG2) Ignition switch: ON System voltage
17 Diagnosis output Ignition switch: ON A voltmeter needle
fluctuates between 0
and 12 V.
18 Diagnosis control output Ignition switch: ON System voltage – 2V
19 Photo sensor (+) At all times 0 V
20 Earth to potentiometer At all times 0 V
21 Mode selection damper control motor
(FACE)
When the damper flap is moving to the
FACE position. 10 V
( )
When the damper flap is moving to the
DEF position. Faint voltage (0.5 V)
22 Air mixing damper control motor
(MAX COOL)
When the damper flap is moving to the
MAX COOL position. 10 V
( )
When the damper flap is moving to the
MAX HOT position. Faint voltage (0.5 V)