HEATER, AIR CONDITIONER AND VENTILATION-Troubleshooting55-13
Termi-
nal no.Normal state Check when Check item
9---
10Ignition switch (IG2) power supplyIgnition switch: ONBattery voltage
11Illumination earthAny time0V
12EarthAny time0V
13Air thermo sensorWhen temperature around sensor 25_C (1.5kΩ)2.2 V
14---
15---
16Air thermo sensor earthAny time0V
CHECK AT THE A/C-ECU TERMINAL
Termi-
nal no.Check itemCheck whenNormal state
1Engine-ECU output (A/C1)When A/C OFF0Vgp()
A/C switch: ON, blower: ON (room temperature)Battery voltage
2Engine-ECU output (A/C2)At A/C low loadBattery voltagegp()
At A/C high load0V
3EarthAny time0V
4Air thermo sensor earthAny time0V
5Illumination power supplyLighting switches: ONBattery voltage
6Air thermo sensorWhen temperature around sensor 25_C (1.5kΩ)2.2 V
7Ignition switch (IG2) power supplyIgnition switch: ONBattery voltage
8Blower switch (LO)Blower switch: LOBattery voltage
9Rear defogger switchDefogger switch: ON0Vgg
Defogger switch: OFFBattery voltage
10Inside/outside air changeover
dt(tidi)
When damper moved to inside circulation position0Vg
damper motor (outside air)When damper moved to outside air induction
positionBattery voltage
11Inside/outside air changeover
dt(i idi)
When damper moved to inside circulation positionBattery voltageg
damper motor (inside air)When damper moved to outside air induction
position0V
12Illumination earthAny time0V
Resister, Blower Motor, Inside/outside
Air Changeover Damper MotorHEATER, AIR CONDITIONER AND VENTILATION-55-33
INSPECTION
Resister Check
Standard values:
Test terminalsStandard value (Ω)
HI - LO (between terminals 2 and 4)2.54
HI - ML (between terminals 2 and 1)1.24
HI - MH (between terminals 2 and 3)0.6
Blower Motor Check
Check that the motor is running when the battery voltage
is applied between the terminals. Check that the motor is
not producing any abnormal noise at that time.
Inside/Outside Air Changeover Damper Motor Check
Battery connection terminal lever
operationOperating the lever
467
Turn to cabin air side
Turn to outside air side
Battery connection terminal lever
operationOperating the lever
467
Turn to outside air side
Turn to cabin air side
Caution
When the lever is in the OFF position, no power is supplied.
Inside air
Outside air
