Honda ACCORD HYBRID 2005 Service Manual page 617

DTC P1078: IMT Valve Stuck in Long Position
1. Start the engine, and hold the engine speed above
4,000 r p m .
2. Make sure the IMT VALVE CMD is OPEN in the
DATA LIST w i t h the HDS.
3. Check the IMT VALVE S W in the DATA LIST w i t h
the HDS.
Is CLOSED indicated?
Y E S — G o t o step 4.
NO—Intermittent failure, system is OK at this t i m e .
Check for poor connections or loose terminals at
the IMT actuator and the PCM. •
4. Let the engine idle, then t u r n the ignition switch
OFF.
5. Disconnect the IMT actuator 5P connector.
6. Turn the ignition switch ON (II).
7. Measure voltage between IMT actuator 5P
connector terminal No. l a n d body g r o u n d .
IMT A C T U A T O R 5P C O N N E C T O R
VCC2
(YEL/BLU)
1 2 3
V
5 /
Wire side of female t e r m i n a l s
Is there about 5 V?
Y E S — G o t o step 8.
NO—Repair open in the w i r e between the PCM
(C14) and the IMT actuator, then go to step 25.
8J Measure voltage between IMT actuator 5P
connector terminal No. 3 and body g r o u n d .
IMT A C T U A T O R 5P C O N N E C T O R
IMTM
(WHT/BLK)
1 2 3
V
5 /
W i r e side of female t e r m i n a l s
Is thereaboutSV?
Y E S — G o to step 9.
NO—Go to step 14.
9. Turn the ignition switch OFF.
10. J u m p the SCS line w i t h the HDS.
1 Disconnect PCM connector C (22P).
12. Connect IMT actuator 5P connector terminal No. 2
to body g r o u n d w i t h a j u m p e r w i r e .
IMT A C T U A T O R 5P C O N N E C T O R
1 2 3
V
5 /
SG2
(GRN/YEL)
JUMPER
WIRE
W i r e side of female t e r m i n a l s
(cont'd)
11-377