Subaru Forester 2.5X 2003, Technicians Reference Booklet

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20
June 2002
2003 New Model Update
(912) Forester
Self Diagnostic Procedure
Push and hold the “DEF” and the “A/C” switch while starting the engine.
All of the LEDs will turn on and off in following sequence of 5 steps.
Step Fan Mode Def Rear Def A/C Recirc Auto
1 1 Vent On
2 2 Bilevel On
3 3 Heat On
4 4 Def/Heat On
5 4 Def/Heat On
This process will cycle twice. At the end of the second cycle all LEDs should be off.
Except the A/C LED.
Except the A/C LED.
Except the A/C LED. Except the A/C LED.
Except the A/C LED. LEDs remaining on indicate a problem and the condition of that problem.
The chart below describes how to interpret the LED and corresponding problem,
Step Sensor LED
1 In-vehicle Vent
2 Ambient Bi-Level
3 Evaporator Heat
4 Sun load Def/Heat
5 Air mix door PBR Fan Speed 1
6 Combination Meter Fan Speed 2
Communication
If the “DEF” led
“DEF” led
“DEF” led “DEF” led “DEF” led is off
off
off off off during any of the 6 steps for sensor checks an open circuit
open circuit
open circuit open circuit open circuit can be assumed.
If the “DEF” led “DEF” led “DEF” led “DEF” led “DEF” led is on on on on on during any of the 6 steps for sensor checks a shorted circuit shorted circuit shorted circuit shorted circuit shorted circuit can be assumed.
If the Rear window defogger LED
Rear window defogger LED
Rear window defogger LED Rear window defogger LED Rear window defogger LED is off
off
off off off during any of the 6 steps for sensor checks the problem is
a current failure
current failure
current failure current failure current failure.
If the Rear window defogger LED Rear window defogger LED
Rear window defogger LED Rear window defogger LED
Rear window defogger LED is on on
on on
on during any of the 6 steps for sensor checks the problem is
a previous failure previous failure previous failure previous failure previous failure.