Honda Accord 2008 Manual page 422

07/11/02 09:04:04 61TA0000_110_0103
DTC P0138:
Circuit High 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 1.27 V or more?
YES
−
NO
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. Connect secondary HO2S (Sensor 2) 4P connector
terminals No. 1 and No. 2 with a jumper wire.
＊０１
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
Secondary HO2S (Sensor 2)
− Go to step 5.
Intermittent failure, the system is OK at this
JUMPER WIRE
SG2 (GRN/BLK) SHO2S (WHT/RED)
Terminal side of male terminals
8. Turn the ignition switch to ON (II).
9. Check the HO2S S2 in the DATA LIST with the HDS.
Does the voltage stay at 1.27 V or more?
YES − Go to step 10.
−
NO Go to step 19.
10. Turn the ignition switch to LOCK (0).
11. Remove the jumper wire from the secondary HO2S
(Sensor 2) 4P connector.
12. Connect secondary HO2S (Sensor 2) 4P connector
terminal No. 2 to body ground with a jumper wire.
SECONDARY HO2S (SENSOR 2) 4P CONNECTOR
Terminal side of male terminals
13. Turn the ignition switch to ON (II).
14. Check the HO2S S2 in the DATA LIST with the HDS.
Does the voltage stay at 1.27 V or more?
−
YES Go to step 15.
NO − Repair open in the wire between the ECM/
PCM (B34) and the secondary HO2S (Sensor 2),
then go to step 21.
ＴＡ０８ＡＥＡＫ７２１０００９０１３８ＦＡＡＴ３０
SHO2S (WHT/RED)
JUMPER WIRE
(cont'd)
11-103
＊０２