Honda Accord 2008 Manual page 420

07/11/02 09:04:04 61TA0000_110_0101
DTC P0137: Secondary HO2S (Sensor 2)
Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral) until the radiator fan comes
on.
4. Check the HO2S S2 in the DATA LIST with the HDS.
Does the voltage stay at 0.05 V or less?
YES − Go to step 5.
−
NO Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the secondary HO2S (Sensor 2) and the ECM/
PCM.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the secondary HO2S (Sensor 2) 4P
connector.
7. Turn the ignition switch to ON (II).
8. Check the HO2S S2 in the DATA LIST with the HDS.
Does the voltage stay at 0.05 V or less?
YES − Go to step 9.
−
NO Go to step 13.
9. Turn the ignition switch to LOCK (0).
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector B (49P).
12. Check for continuity between secondary HO2S
(Sensor 2) 4P connector terminal No. 2 and body
ground.
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
Terminal side of male terminals
Is there continuity?
−
YES Repair short in the wire between the ECM/
PCM (B36) and the secondary HO2S (Sensor 2),
then go to step 15.
NO − Go to step 23.
13. Turn the ignition switch to LOCK (0).
14. Replace the secondary HO2S (Sensor 2) (see page
11-225).
15. Reconnect all connectors.
16. Turn the ignition switch to ON (II).
17. Reset the ECM/PCM with the HDS.
18. Do the ECM/PCM idle learn procedure (see page
11-343).
19. Start the engine, and let it idle without load (A/T in
P or N, M/T in neutral) until the radiator fan comes
on.
ＴＡ０８ＡＥＡＫ７２１０００９０１３７ＦＡＡＴ３０
SHO2S (WHT/RED)
(cont'd)
11-101
＊０１