Honda ACCORD HYBRID 2005 Service Manual page 807

DTC U1202 (64): Motor Control Module
(MCM) Internal Circuit Malfunction
DTC U1203 (75): Motor Control Module
(MCM) Internal Circuit Malfunction
1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs of the PGM-FI
system w i t h the HDS.
Is DTC U0037 indicated?
Y E S — D o the troubleshooting for DTC U0037
(see page 11-180).
N O — G o t o step 3.
3. Reset the M C M (see page 12-6).
4. Check for Temporary DTCs or DTCs w i t h the HDS.
Is DTC U1202 or U1203 indicated?
Y E S — G o t o step 5 .
NO—Intermittent failure, system is OK at this
t i m e . B
5 . 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).
6. 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?
Y E S - l f DTC U1202 or U1203 is indicated, check for
poor connections or loose terminals at 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 was updated, troubleshooting is
complete. If the M C M was substituted, replace the
original M C M (see page 12-8). •
DTC U1220 (34): DC-DC Converter Lost
Communication w i t h Motor Control Module
(MCM)
1. Turn the ignition switch ON (II).
2. Reset the M C M (see page 12-6).
3. Check for T e m p o r a r y DTCs or DTCs w i t h the HDS.
Is DTC U1220 indicated?
Y E S — G o to step 4.
NO—Intermittent failure, system is OK at this t i m e .
Check for poor connections or loose terminals at
the DC-DC converter and the M C M . B
4. Turn the ignition switch OFF.
5 . Turn the battery module switch OFF (see page 12-4).
6. Remove the IPU lid (see page 12-140).
7. Disconnect M C M connector B (24P).
8. Disconnect the DC-DC converter 4P connector.
9. Check for continuity between M C M connector
terminal B19 and body g r o u n d .
MCM C O N N E C T O R B (24P)
I
1
/
3 / 5
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
DVB ( Y E L / B L U )
W i r e side of female t e r m i n a l s
Is there continuity?
Y E S — R e p a i r short in the w i r e between the DC-DC
converter and the M C M (B19), then go to step 1 5 .
N O — G o t o step 10.
(cont'd)
12-129