Honda ACCORD HYBRID 2005 Service Manual page 410

PGM-FI System
DTC Troubleshooting (cont'd)
DTC P2252: Rear A/F Sensor (Bank 1,
Sensor 1) VS Line Low Voltage
DTC P2255: Front A/F Sensor (Bank 2,
Sensor 1) VS Line Low Voltage
NOTE: 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 o n , then let it idle 2 minutes.
4. Check for Temporary DTCs or DTCs w i t h the HDS.
Is DTC P2252 and/or P2255* indicated?
Y E S — G o t o step 5.
NO—Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the A/F sensor (Sensor 1) and the PCM.H
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. Check for continuity between PCM connector
terminal B12 (B20K and body g r o u n d .
PCM C O N N E C T O R B (24P)
VSB1 (BLU)
1 2 3 4 6 7
8 9 10 11 12 13 14 15
/
17 18 19
20 21 22 23 24
V S B 2 ( R E D / B L U ) *
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 between the PCM
(B12 (B20)*) and the A/F sensor (Sensor 1), then go
to step 14.
N O — G o t o step 10.
10. Reconnect PCM connector B (24P).
11. 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.
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