Troubleshooting Flowchart - Fuel Supply System - Honda Prelude 1993 Service Manual

PGM-FI System
Troubleshooting Flowchart - Fuel Supply System
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- - - | t
The Matfunction Indicator Lamp (MlL) indicates Diagnostic Trouble code (DTC) 43: A problem in
the Heated Oxygen Sensor {HO25) circuit or a problem in the Fuel Supply System
l@r rE.
lTo page 11-63)
Fiom cod. 1 troubb-
3hootlng lpag. I
'l -561.
- Tho MtL hc! b.cn roportod on .
- Wlth rorvico chock connoctoi
iurDod t!.3 p.Oe 1 1 42), codo
43 l. indicatod.
Go to Fu.l Supply Systam (3.o
p ! 9 . l 1 - ' 1 1 3 1 .
ls the codo 43 accompaniod by
the MIL and poor driveabilitY?
Do the ECM Reset Procedure
lse6 page 1 1-43).
warm up engine to normSl oper'
ating tompgrature {the radiator fan
comes on).
Hold engine at 3,OOO rpm lor two
mtnutes.
( A / T : N o r E p o s i t i o n . )
Intlrmlttdrt
t ilurc, ly.tom is OK
at thir dm€ (t6st drlv. may ba
nocoalarYl.
Chock tor ooor connactiona o.
loor. wirst at C432 lloclt.d !t
rtght rhock low.tl, C1f4IHO2S) -
and ECM.
ls the MIL on and doss it
indicate code 43?
Turn the ignition switch OFF.
Connect the test hamess bgtween
the ECM and connoctors {see
page 1'l-45).
With the ignition swhch OFF, wait
tor st least two minutes.
Install a iumper wire on the test
harness botween A6 and A26.
Turn the ignition switch ON.
Measure voltage between Dl4
l + ) t e r m i n a l a n d A 2 6 { - ) t e r m i -
nal as soon as the ignition switch
is turned on,
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-t 13 l
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, , t i
i,l
NOTE:
. Use DIGITAL MULTIMETER
(KS-AHM-32-OO3) or equival6nt.
. Use 2 Volt range.
6
A26
JUMPER WIRE
Voltaga .hould ttan tl
0.4-0.5
v wh.n thc
ignltion .whch i. fit8t
tunad oo, and dactaaso
to b.low O.l V In L.t
than two mlnut6a.
D 1 4 ( + l
A 2 6 { - t
I
11-62