Honda ACCORD HYBRID 2005 Service Manual page 408

PGM-FI System
D T C T r o u b l e s h o o t i n g ( c o n t ' d )
DTC P2251: Rear A/F Sensor (Bank 1,
Sensor 1) VS Line High Voltage
DTC P2254: Front A/F Sensor (Bank 2,
Sensor 1) VS Line High Voltage
NOTE:
• If DTCP2251 and/or P2254* is stored at the same time
as DTC P0134 and/or P0154*, troubleshoot DTC P2251
and/or P2254 * first, then recheck for P0134 and/or
P 0 1 5 4 \
• Information marked w i t h an asterisk (*) applies to the
front bank (Bank 2).
1. Turn the ignition switch ON (II).
2. Clear the DTC w i t h the HDS.
3. Start the engine. Hold the engine speed at
3,000 r p m w i t h o u t load (in Park or neutral) until the
radiator fan comes on, then let it idle 2 minutes.
4. Check for Temporary DTCs or DTCs w i t h the HDS.
Is DTC P2251 and/or P2254* indicated?
Y E S — G o t o step 5.
NO—Intermittent failure, system is OK at this t i m e .
Check for poor connections or loose terminals at
the A/F sensor (Sensor 1) and the PCM. •
5. Turn the ignition switch OFF.
6. J u m p the SCS line with the HDS.
7. Disconnect the A/F sensor (Sensor 1) 8P connector.
8. Disconnect PCM connector B (24P).
9. Connect A/F sensor (Sensor 1) 8P connector
terminal No. 6 to body g r o u n d w i t h a j u m p e r wire.
A / F S E N S O R (SENSOR 1) 8P C O N N E C T O R
1 2 3 4
/
6 •7 8
V S B 1 ( B L U )
V S B 2 ( R E D / B L U ) *
J U M P E R WIRE
W i r e side of female terminals
10. Check for continuity between PCM connector
terminal B12 (B20)* and body g r o u n d .
PCM CONNECTOR B (24P)
V S B 1 ( B L U )
V S B 2 (RED/BLU)
W i r e side of female terminals
Is there continuity?
YES—Go to step 11.
NO—Repair open in the w i r e between the PCM
(B12 (B20)*) and the A/F sensor (Sensor 1), then go
to step 15.
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