Honda Accord 2008 Manual page 1058

07/11/02 09:17:36 61TA0000_140_0215
DTC U0122: F-CAN Malfunction (PCM-VSA
Modulator-Control Unit)
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-4).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs in the PGM-FI
SYSTEM with the HDS.
Is DT C U0122 indicated in the PGM-F I SY ST EM?
YES − Go to the DTC U0122 troubleshooting in the
PGM-FI SYSTEM (see page 11-191).
NO − Go to step 4.
4. Check for Temporary DTCs or DTCs in the A/T
SYSTEM with the HDS.
Is DT C U0122 indicated in the A/ T SY ST EM?
−
YES Go to step 5.
NO − Intermittent failure, the system is OK at this
time. If any other Temporary DTCs or DTCs were
indicated, go to the indicated DTC's
troubleshooting.
5. Update the PCM if it does not have the latest
software (see page 11-231), or substitute a known-
good PCM (see page 14-8).
6. Start the engine, and wait for at least 2 minutes.
7. Check for Temporary DTCs or DTCs in the A/T
SYSTEM with the HDS.
Is DT C U0122 indicated in the A/ T SY ST EM?
YES − Check for poor connections or loose
terminals between the VSA modulator-control unit
and the PCM. If the PCM was updated, substitute a
known-good PCM (see page 14-8), then go to step
6. If the PCM was substituted, go to step 1.
NO − Go to step 8.
8. Monitor the OBD STATUS for U0122 in the DTCs
MENU with the HDS.
Does the HDS indicate PASSED?
−
YES If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-232). If any other
Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTC's troubleshooting.
−
NO If the HDS indicates FAILED, check for poor
connections or loose terminals between the VSA
modulator-control unit and the PCM. If the PCM
was updated, substitute a known-good PCM
(see page 14-8), then go to step 6. If the PCM was
substituted, go to step 1. If the HDS indicates NOT
COMPLETED, go to step 6.
ＴＡ０８ＡＥＢＫ７７１０００Ｕ０１２２ＦＡＡＴ００
14-213