Honda ACCORD HYBRID 2005 Service Manual page 1630

Climate Control
D T C T r o u b l e s h o o t i n g ( c o n t ' d )
DTC B2997 or DTC indicator V: A Short in the
Heater Core Temperature Sensor Circuit
1. Clear the DTC by t u r n i n g the ignition switch OFF,
and then ON (II).
2. Operate the climate control system in several
modes.
3. Check for DTCs using the HDS or self-diagnostic.
Is DTC B2997 or V indicated?
YES—Go to step 4.
NO—Intermittent failure. •
4. Turn the ignition switch OFF.
5. Disconnect heater core t e m p e r a t u r e sensor 2P
connector. Check the resistance between heater
core temperature sensor 2P connector terminals
No. 1 and No. 2.
H E A T E R C O R E T E M P E R A T U R E S E N S O R 2P C O N N E C T O R
Wire side of female t e r m i n a l s
Is the resistance as specified (see page 21-79)?
YES—Go to step 6.
NO—Replace the heater core temperature
sensor. •
6. Disconnect audio-HVAC display panel connector A
(22P).
7. Check for continuity between the audio-HVAC
display panel connector A (22P) terminal No. 21
and body g r o u n d .
AUDIO-HVAC DISPLAY P A N E L C O N N E C T O R A (22P)
1
2 3 4 5
6
7 8 9 10
11 12 13 14 15 16
X
17 18
19
20 21 22
PNK
Wire side of f e m a l e t e r m i n a l s
Is there continuity?
YES—Repair short to body g r o u n d in the w i r e
between the audio-HVAC display panel and the
heater core temperature sensor. •
N O — G o t o step 8.
8. Check for continuity between audio-HVAC display
panel connector A (22P) t e r m i n a l s No. 15 and
No. 2 1 .
AUDIO-HVAC DISPLAY P A N E L C O N N E C T O R A (22P)
1
2 3 4 5 6 7 8 9 10
11 12 13 14 15 18 19 20 21 22
PUR
PNK
Wire side of f e m a l e t e r m i n a l s
Is there continuity?
YES—Repair short in the w i r e s between the
audio-HVAC display panel and the heater core
temperature sensor. •
NO—Substitute a k n o w n - g o o d audio-HVAC display
panel, and recheck. If the s y m p t o m / i n d i c a t i o n goes
away, replace the original audio-HVAC display
p a n e l . !
21-60