Honda ACCORD HYBRID 2005 Service Manual page 1629

H D
DTC B2996 or DTC indicator U: An Open in
the Heater Core Temperature Sensor Circuit
1. Clear the DTC by turning 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 seif-diagnostic.
Is DTC B2996 or U indicated?
Y E S — G o t o step 4.
NO—Intermittent failure, check for loose wires or
poor connections on the heater core temperature
sensor c i r c u i t . •
4. Turn the ignition switch OFF.
5. Disconnect heater core temperature sensor 2P
connector. Check the resistance between heater
core temperature sensor 2P connector terminals
No. 1 and No. 2.
HEATER 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
1
PNK j [ R E D / B L K
Wire side of female t e r m i n a l s
Is the resistance as specified (see page 21-79)?
Y E S — G o t o step 6.
NO—Replace the heater core temperature
sensor. •
6. Disconnect audio-HVAC display panel connector
A(22P).
7. Check for continuity between audio-HVAC display
pane! connector A (22P) terminal No. 21 and heater
core temperature sensor 2P connector terminal
No. 1.
A U D I O - H V A C D I S P L A Y P A N E L C O N N E C T O R A (22P)
W i r e s i d e o f f e m a l e t e r m i n a l s
2 3 4 5
1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 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
W i r e side of f e m a l e t e r m i n a l s
Is there continuity?
Y E S — G o t o step 8.
NO—Repair open in the w i r e between the
audio-HVAC display panel and the heater core
temperature sensor. •
8. Check for continuity between audio-HVAC display
panel connector A (22P) t e r m i n a l No. 15 and heater
core temperature sensor 2P connector terminal
No. 2.
A U D I O - H V A C D I S P L A Y P A N E L C O N N E C T O R A (22P)
W i r e s i d e o f f e m a l e t e r m i n a l s
<T7
2 3 4 5
1 2 1 3 1 4 1 5 1 6
X 1 7 1 8 1 9 2 0 2 1 2 2
R E D / B L K
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
W i r e side of f e m a l e t e r m i n a l s
Is there continuity?
YES —Check for loose wires or poor connections at
audio-HVAC display panel connector A (22P) and at
the heater core temperature sensor 2P connector. If
the connections are g o o d , 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 . •
NO—Repair open in the w i r e between the audio-
HVAC display panel and the heater core
temperature sensor. •
21-59