Honda ACCORD HYBRID 2005 Service Manual page 810

IMA System
DTC Troubleshooting (cont'd)
14. Check for continuity between M C M connector
t e r m i n a l B18 and body g r o u n d .
MCM C O N N E C T O R B (24P)
I
1
/
3
6 7
8 9
/
1 1 1 2 1 3 1 4 1 5
/
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4
DVA (GRN/BLK)
Wire side of f e m a l e t e r m i n a l s
Is there continuity?
YES—Repair short in the w i r e between the DC-DC
converter and the M C M (B18), then go to step 20.
N O — G o t o step 15.
15. Check for continuity between M C M connector
t e r m i n a l B18 and DC-DC converter 4P connector
t e r m i n a l No. 3.
MCM C O N N E C T O R B (24P)
I
1
/
3 6 7
8 9 / 1 1 1 2 1 3 1 4 1 5 /
1 7 1 8 1 9 2 0 2 1 2 2 2 3 2 4
DVA (GRN/BLK)J
DVA ( G R N / B L K ) .
Wire side of f e m a l e t e r m i n a l s
DC-DC C O N V E R T E R
4P C O N N E C T O R
1
2
3 4
Terminal side of male t e r m i n a l s
Is there continuity ?
Y E S — G o t o step 16.
NO—Repair open in the w i r e between the DC-DC
converter and the M C M (B18), then go to step 20.
16. Substitute a k n o w n - g o o d DC-DC converter
(see page 12-143).
17. Turn the ignition switch ON (II).
18. Reset the M C M (see page 12-6).
19. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Is DTC U1221 indicated?
Y E S - G o t o step 26.
NO—Replace the original DC-DC converter
(see page 12-143), then go to step 20.
20. Turn the ignition switch OFF.
2 1 . Reconnect all connectors.
22. Reinstall the IPU lid (see page 12-140), then turn the
battery m o d u l e switch ON (see page 12-4).
23. Turn the ignition switch ON (II).
24. Reset the M C M (see page 12-6).
25. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
YES—If DTC U1221 is indicated, check for poor
connections or loose t e r m i n a l s at the DC-DC
converter and the M C M , then go to step 1. If any
other T e m p o r a r y DTCs or DTCs are indicated, go to
the indicated D T C s t r o u b l e s h o o t i n g .
NO—Troubleshooting is complete. •
26. Reinstall the IPU lid (see page 12-140), then t u r n the
battery m o d u l e switch ON (see page 12-4).
27. Update the M C M if it does not have the latest
software, or substitute a k n o w n - g o o d M C M
(see page 12-8).
28. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Are any Temporary DTCs or DTCs indicated?
YES—If DTC U1221 is indicated, check for poor
connections or loose t e r m i n a l s at the DC-DC
converter and the M C M , then go to step 1. If any
other T e m p o r a r y DTCs or DTCs are indicated, go to
the indicated D T C s t r o u b l e s h o o t i n g .
NO—If the M C M w a s updated, t r o u b l e s h o o t i n g is
complete. If the M C M w a s substituted, replace the
original M C M (see page 1 2 - 8 ) . •
12-132