Honda ACCORD HYBRID 2005 Service Manual page 446

PGM-FI System
M I L C i r c u i t T r o u b l e s h o o t i n g (cont'd)
52. Turn the ignition switch OFF.
53. Disconnect the connector f r o m each of the
f o l l o w i n g sensors, one at a t i m e , and measure
voltage between body g r o u n d and PCM connector
terminal A12 with the ignition switch ON (II).
• Manifold absolute pressure (MAP) sensor
• Output shaft (countershaft) speed sensor
PCM C O N N E C T O R A (31P)
1 2 | 3 | 4 | 5
6 | 7
8 | 9
10 11 12 13 14 15 16 17 18 19 20 21
/
23 2 4 25 26 27 28 29 30 31
VCC1 ( Y E L / R E D )
Wire side of female t e r m i n a l s
Is there about 5 V?
YES—Replace the sensor that restored 5 V w h e n
disconnected. •
NO—Go to step 54.
54. Turn the ignition switch OFF.
55. J u m p the SCS line w i t h the HDS.
56. Disconnect the connectors f r o m these sensors:
• Manifold absolute pressure (MAP) sensor
• Output shaft (countershaft) speed sensor
57. Disconnect PCM connector A (31P).
58. Check for continuity between PCM connector
terminal A12 and body g r o u n d .
PCM C O N N E C T O R A (31P)
1 2
3
4 | 5
6 | 7 8
9
10 11 12 13 14 15 16 17 18 19 20 21
/
23 2 4 25 26 27 28 29 30 31
VCC1 ( Y E L / R E D )
Wire 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 PCM
(A12) and the MAP sensor or the output sfaft
(countershaft) speed s e n s o r . •
NO—Update the PCM if it does not have the latest
software, or substitute a k n o w n - g o o d PCM
(see page 11-6), then recheck. If the s y m p t o m /
indication goes away w i t h a known-good PCM,
replace the original PCM (see page 1 1 - 2 1 9 ) . •
59. Measure voltage between body ground and PCM
connector terminal C13.
PCM C O N N E C T O R C (22P)
i
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
16 17 18 19 20 21 22
V C C 2 ( Y E L / B L U )
Wire side of f e m a l e t e r m i n a l s
Is there about 5 V?
Y E S — G o t o step 67.
NO—Go to step 60.
11-206