Honda Prelude 1993 Service Manual page 302

PGM-Fl System
Troubleshooting Flowchart - Engine control Module IECMI (cont'd)
Less than
'1.0 v?
ls rhere less than 1.0 V?
A 2 5 ( . r ) 8 1 { + )
Measure voltage between A26
I - ) and the following: 81 {+ ) and
A 2 5 ( + ) .
A26 82
l l
]L
BATTERY
VOLTAGE?
BATTERY
VOLTAGE?
(From page 1 '!-53)
Measure voltage between body
ground and the tollowing terminal
individually: A26, B2.
Repai. op6n in BLK/RED lA26) or
BRN/BLK (B2l.nd G101 llocatod
6t thormoslat housingl.
- Repair opon in YEL/BLK wir6
betweon ECM (425, 81) and
PGM-Fl main iolay.
- Check PGM-FI main tolaY .nd
wiring connoctors at PGM-FI
main r6lav.
Substitute a known-good ECM
and recheck. lf symptom/indica-
tion goes avray, replace the otigi-
nal ECM.
11-54
Y