Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 5 - Body HVAC SYSTEM (AUTO AC) (DIAGNOSTICS) Self-diagnosis
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SELF-DIAGNOSIS
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
5. Self-diagnosis
A: OPERATION
(3) (4) (5)
(2) (7)
(1) (9) (6)
(8)
AC-00100
(1) Temperature control dial (4) A/C switch (7) Rear window defogger switch
(2) OFF/BRIGHT switch (5) DEF switch (8) FRESH/RECIRC switch
(3) AUTO switch (6) Mode control dial (9) Fan speed control dial
: (2)
(1)
(3)
OFF
DEF + A /C
(4)
(5)
(6) AUTO
FRESH / RECIRC
FRESH / RECIRC
A/C
(7) (9)
A/C
AUTO AUTO
A/C FRESH / RECIRC
(8) (10)
FRESH / RECIRC A/C
AUTO AUTO
AC-00242
(1) Normal Operation (5) LED Display Check (8) Sensor Check (Phased Operation)
(2) Switch (6) After the LED display for approx. (9) Output Equipment Operation
(3) Turn ignition switch on with press- 20 seconds. (Sequential Operation)
ing (7) Sensor Check (Sequential Opera- (10) Output Equipment Operation
(4) Self-diagnosis Function tion) (Phased Operation)
AC-10
SELF-DIAGNOSIS
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Step Check Yes No
1 SELECT CONTROL PANEL TO SELF-DIAG- Does the self-diagnosis func- Go to step 2.
2 CHECK LED ILLUMINATION. Do all LED blink? Go to step 3. Go to step 5.
Make sure that three LED blink in turn on con-
trol panel. (5 patterns are repeated 2 times.)
3 CHECK SENSORS MALFUNCTION. Does each DEF, MODE and Go to step 4. Confirm the com-
1) After the LED check completed or AUTO fan speed LED turn off? bination of illumi-
switch pressed, the A/C switch LED illumi- nating LEDs by
nates, and then the sensor check is started. using Sensor
2) Check the input signal of each sensor in Check Table, and
turn. If there are any trouble for each sensor, identify the mal-
DEF, MODE and fan speed LEDs blinks. Also functioning sensor
check for each sensor is possible respectively before repairing.
every time AUTO switch is pressed. (At this TION, Self-diagno-
3) If there is no trouble, DEF, MODE and fan sis.>
speed LEDs are turned off.
NOTE:
Rear window defogger LED illuminates in case
of stored malfunction but does not illuminate in
case of present malfunction.
4 CHECK OPERATION OF EACH ACTUATOR, Does each actuator, compres- Press the OFF Refer to each
COMPRESSOR AND FAN MOTOR. sor and fan motor operate switch or turn the diagnostics chart
1) Press the FRESH/RECIRC switch. according to operating mode ignition switch to for actuator, com-
(FRESH/RECIRC switch LED illuminates at table? OFF and finish the pressor and fan
this time.) self-diagnosis motor, and repair
2) Refer to OPERATING MODE TABLE to function. the malfunctioning
check the operation of each actuator, compres- part as necessary.
sor and fan motor.
Also check for each step is possible respec-
tively every time AUTO switch pressed. (At this
time, the AUTO switch LED illuminates.)
5 CHECK POOR CONTACT. Is there a poor contact in con- Repair the con- Replace the A/C
Check the A/C control module connector for nector? nector. control module.
poor contact.
AC-11
SELF-DIAGNOSIS
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
1. SENSOR CHECK TABLE
NOTE:
When the sunload sensor is checked indoors or in the shade, open circuit might be indicated. Always check
the sunload sensor at a place where sun shines directly on it.
Present Stored
Diag- Open circuit Short circuit
malfunction malfunction
nostic Checked sensor
steps MODE/FAN MODE/FAN
DEF LED DEF LED REAR DEFOGGER LED
LED LED
VENT VENT
1 In-vehicle sensor LED LED
blinks blinks
BI-LEVEL BI-LEVEL
2 Ambient sensor LED LED
blinks blinks
HEAT HEAT
3 Evaporator sensor LED LED
blinks blinks
Turn off DEF/HEAT Illuminate DEF/HEAT Turn off Illuminate
4 Sunload sensor*1 LED LED
blinks blinks
Fan speed Fan speed
1st 1st
5 Air mix door actuator P.B.R.
LED LED
blinks blinks
Fan speed Fan speed
Combination meter commu- 2nd 2nd
6
nication (Ambient sensor) LED LED
blinks blinks
When all parts are in good
Turn off
condition
*1: Only present malfunction is indicated for open circuit of sunload sensor. (However, stored malfunction
can be indicated for short circuit of sunload sensor.)
2. OPERATING MODE TABLE
Step 1 2 3 4 5 6 7 8
VENT BI-LEVEL DEF/HEAT Fan dial Fan dial Fan dial Fan dial
Illuminating LED HEAT LED
LED VENT LED 1st LED 2nd LED 3rd LED 4th LED
Fan dial LO LO ML ML ML MH MH HI
Mode actuator VENT VENT VENT BI-LEVEL HEAT HEAT DEF/HEAT DEF
Intake actuator FRESH RECIRC RECIRC FRESH FRESH FRESH FRESH FRESH
FULL FULL FULL
MEDIUM MEDIUM FULL HOT FULL HOT FULL HOT
Air mix door actuator (%) COOL COOL COOL
(50%) (50%) (100%) (100%) (100%)
(0%) (0%) (0%)
Compressor OFF ON ON ON ON ON ON ON
AC-12
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