Honda Civic Service Manual page 1395

Troubleshooting -'99 - 00 Models
Symptom
Mode control motor does not run, or one or more modes are inoperat've'
Recirculation control door does not change between Fresh and Recirculate'
Blower motor only runs on high speed position; it does not run in
any other speed positions
Blower motor does not run at all.
Both heater and Ay'C do not work
See pags
a 1 _ t q
21-21
21-29
21-31
2 1 3 5
Symptom Chart
For electrical malfunctions which are indicated by the self-diagnostic system,
refer to self-diagnosis function (see next
page).
Note these items before troubleshooting a symptom'
. Check the engine coolant level, and allow the engine to warm up before troubleshooting'
. Any abnormality must be corrected before continuing the test
. B e c a u s e o f t h e p r e c | s e m e a s u r e m e n t s n e e d e d , U s e a d i g i t a I m u | t i m e t e r w i t h a n o u t p u t o f l m A o r | e s s a t t h e 2 0 k
range when testing
. Before performing any troubleshooting procedures check:
-
Fuses No. 41 115 Al, No 55 (40 A)]n the under-hood fuse/relay box' and
No 17 (7 5 A) in the under-dash fuse/relav
box
- Grounds No. G401, G402
- Cleanliness and tightness of all connectors
21-19