Honda ACCORD HYBRID 2005 Service Manual page 437

DTC U1201: IMA-CAN Malfunction (MCM-
(Motor Control CPU)-PCM)
NOTE: Information marked with an asterisk (*) applies
to the IMACANL line.
1. Turn the ignition switch ON (II) and read the HDS.
Does the HDS communicate with the IMA system?
Y E S - G o t o step 2.
NO—Go to ' I M A System Indicator Circuit
Troubleshooting" (see page 12-133). •
2. Clear the DTC w i t h the HDS.
3. Check for Temporary DTCs or DTCs in the DTCs
MENU with the HDS.
Is DTC U1201 indicated?
Y E S - G o t o step 4.
NO—Intermittent failure, system is OK at this time.
Check for poor connections or loose terminals at
the M C M , the A/C compressor driver, and the
PCM.B
4. Check for Temporary DTCs or DTCs in the DTCs
MENU with the HDS again.
Are DTC U0037 and U1201 indicated at the same
time?
YES—Go to troubleshooting DTC U0037 (see page
11-180).
N O — G o t o step 5.
5. Check for Temporary DTCs or DTCs in the DTCs
MENU w i t h the HDS again.
Are DTC U0110, U0164 and U1201 indicated at
the same time?
Y E S - G o t o step 6.
NO—Substitute a known-good MCM (see page
12-8), then go to step 15 and recheck. If DTC U0037
is not indicated, replace the original M C M , then go
to step 15.
6. Turn the ignition switch OFF.
7. J u m p the SCS line w i t h the HDS.
8. Disconnect PCM connector D (17P).
9. Remove the IPU lid (see page 12-140).
10. Disconnect MCM connector A (31P) (see page
12-140).
11. Disconnect the A/C compressor driver 4P connector
(see page 21-99).
12. Connect between PCM connector terminal D1 \ D13
to body ground with a j u m p e r wire individually.
P C M C O N N E C T O R D ( 1 7 P )
I M A C A N L ( B L K ) *
1 2
/
4 5 6
/
8 9 10 11 12
13 14
15 16 17
I M A C A N H ( W H T )
J U M P E R W I R E
Wire side of female terminals
(cont'd)
11-197