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6. Failure Phenomenon: Two way air exchange lamp blinks
<Situation> Two way air exchange lamp blinks (lit for 4 seconds and off for 1 second).
Dirt sensor is not functioning.
"Timer lamp blinks 17 times" is not stored in the self-diagnosis memory.
<Assumed points of failure>
<Caution>
Self-diagnosis (failure detection) of dirt sensor is performed at the time when automatic two way air exchange is
set.
<Diagnosis flow>
Troubleshooting start
Is the connector (CN9) of the dirt sensor board inserted
securely? Is there wiring disconnection?
Replace "dirt sensor board".
Incomplete insertion of the connector of dirt sensor (Gas sensor) board
Dirt sensor
Yes
No
- 87 -
Repair connector or wiring.
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