Honda ACCORD HYBRID 2005 Service Manual page 342

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 P0138: Rear Secondary H02S (Bank 1,
Sensor 2) Circuit High Voltage
DTC P0158: Front Secondary H02S (Bank 2,
Sensor 2) Circuit High Voltage
NOTE: Information marked w i t h an asterisk (*) applies
to the f r o n t 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.
4. Check the H 0 2 S S2 in the DATA LIST w i t h the HDS.
Does the voltage stay at 1.25 V or more?
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 secondary H02S (Sensor 2) and the PCM. •
5. Turn the ignition switch OFF.
6. Disconnect the secondary H 0 2 S (Sensor 2) 4P
connector.
7. Connect secondary H 0 2 S (Sensor 2) 4P connector
t e r m i n a l s No. 1 and No. 2 w i t h a j u m p e r w i r e .
S E C O N D A R Y H 0 2 S ( S E N S O R 2) 4P C O N N E C T O R
J U M P E R WIRE
S H 0 2 S B 1 (GRN)
S H 0 2 S B 2 (WHT)*
1
2
3 4
S G 2 ( G R N / Y E L )
W i r e side of f e m a l e t e r m i n a l s
8. Turn the ignition switch ON (II).
9. Check the H 0 2 S S2 in the DATA LIST w i t h the HDS.
Does the voltage stay at 1.25 V or more?
Y E S — G o to step 10.
NO—Go to step 19.
10. Turn the ignition switch OFF.
11. Remove the j u m p e r w i r e f r o m the secondary H 0 2 S
(Sensor 2) 4P connector.
12. Connect secondary H 0 2 S (Sensor 2) 4P connector
terminal No. 1 to body g r o u n d w i t h a j u m p e r wire.
S E C O N D A R Y H 0 2 S ( S E N S O R 2) 4P C O N N E C T O R
1
2
3 4
S H 0 2 S B 1 (GRN)
S H 0 2 S B 2 (WHT)*
J U M P E R WIRE
Wire side of f e m a l e t e r m i n a l s
13. Turn the ignition switch O N (II).
14. Check the H 0 2 S S2 in the DATA LIST w i t h the HDS.
Does the voltage stay at 1.25 V or more?
Y E S — G o t o step 15.
NO—Repair open in the w i r e between the PCM
(C12) and the secondary H 0 2 S (Sensor 2), then go
to step 2 1 .
15. Turn the ignition switch OFF.
16. J u m p the SCS line w i t h the HDS.
17. Disconnect PCM connector B (24P).
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