Honda ACCORD HYBRID 2005 Service Manual page 1823

DTC B1027: Trunk Key Cylinder Switch Signal
Error
1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF and then back ON.
3. Operate the trunk key cylinder switch for 2 seconds.
4. Check the DTCs using the HDS.
Is DTC B1027 indicated?
Y E S — G o t o step 5.
NO—Intermittent failure. The trunk key cylinder
system is OK at this t i m e . •
5. W i t h the trunk key cylinder switch in the off
(neutral) position, select the TEST MODE MENU
f r o m the HDS and enter the DATA LIST.
6. Check the ON/OFF information of the Trunk Key
Cylinder Switch (UNLOCK) in the DATA LIST.
Is the information indicator OFF?
Y E S — G o t o step 7.
NO—Go to step 9.
7. Make sure the ON/OFF i n f o r m a t i o n of the Trunk
Key Cylinder Switch (UNLOCK) are changed w h e n
the trunk key cylinder switch is turned to UNLOCK
position w i t h the key.
Does the information show ON when the trunk key
cylinder switch is turned to UNLOCK position,
and show OFF when the trunk key cylinder switch
is returned to the off (neutral) position?
YES—Faulty MICU; replace it. •
N O — G o t o step 8.
8. Check for an open in the w i r e between the MICU
and trunk key cylinder switch.
Are the wire harnesses OK?
YES—Faulty trunk key cylinder switch; replace it. •
NO—An open in the w i r e , repair and recheck. •
9. Disconnect the 3P connector f r o m the trunk key
cylinder switch.
10. Check the ON/OFF information of the Trunk Key
Cylinder Switch (UNLOCK) in the DATA LIST.
Is the information indicator OFF?
YES—Faulty trunk key cylinder switch; replace it. •
N O — G o t o step 11.
11. Check for a short in the w i r e between the MICU and
trunk key cylinder switch.
Are the wire harnesses OK?
YES—Faulty MICU; replace i t . H
N O — A short in the w i r e , repair and r e c h e c k . •
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