Honda Accord 2008 Manual page 510

07/11/02 09:10:08 61TA0000_110_0191
DTC U0122: F-CAN Malfunction (ECM/PCM-
VSA Modulator-Control Unit)
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. Check for Temporary DTCs or DTCs with the HDS.
Are DT C U0029 and U0122 indicated at the same
time?
−
YES Go to troubleshooting for DTC U0029
(see page 11-190).
NO − Go to step 3.
3. Clear the DTC with the HDS.
4. Check for Temporary DTCs or DTCs with the HDS.
Is DT C U0122 indicated?
YES − Go to step 5.
−
NO Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at the VSA modulator-control unit and the ECM/
PCM.
5. Check for communication to the VSA system with
the HDS.
Does the HDS communicate with the V SA
modulator-control unit?
−
YES Go to step 6.
NO − Go to the DLC circuit troubleshooting
(see page 11-208).
6. Turn the ignition switch to LOCK (0).
7. Jump the SCS line with the HDS.
8. Disconnect the VSA modulator-control unit 36P
connector.
9. Disconnect ECM/PCM connector A (49P).
10. Check for continuity between ECM/PCM connector
terminal A3 and VSA modulator-control unit 36P
connector terminal No. 14.
ECM/PCM CONNECTOR A (49P)
CANH (WHT)
Terminal side of female terminals
VSA MODULATOR-CONTROL UNIT 36P CONNECTOR
CANH
(WHT)
Wire side of female terminals
Is there continuity?
−
YES Go to step 11.
NO − Repair open in the wire between the ECM/
PCM (A3) and the VSA modulator-control unit, then
go to step 12.
ＴＡ０８ＡＥＡＫ７２１０００Ｕ０１２２ＦＡＡＴ００
＊０１
(cont'd)
11-191