Honda CR-V 1997 Service Manual page 284

PGM-FI System
Powertrain Control Module (PCM) - '97 Model
NOTE: If this symptom is intermittent. check for a loose fuse No. 25 METER (7 .5 AI in the
The Malfunction Indicator Lamp
under-dash fuse/relay box, a poor connection at PCM terminal
AlB.
or an intermittent
(MIL) never comes on leven for
open in the GRN/ORN wire between the PCM (AlB) and the gauge assembly.
two seconds) after ignition is
turned on (II), or it's on dimly
and flickers.
Turn the ignition switch ON
(II) .
- Repair short or open in the
wire between No. 25 METER
Is the charging system light on? ' )
NO
(7.5 Al fuse and gauge assem-
bly.
PCM CONNECTOR A (32P)
YES
-
Replace No. 25 METER 17.5 A)
fuse. PGlIBLK)
Try to start the engine.
1112 3 4
5 6 1/ 1/ 9 10
111
112V V
1516 17H 192(] 1/ 22 23
24 1
"-
NO
V V
27 1/ 1/ / 1/
"' "
Does the engine start?
/'
-
PG2
YES (BLK)
Check for an open in the wires
y
y
(PG1, PG2Iines):
1. Turn the ignition switch ON
(II) .
2. Measu r e voltage between
body ground and PCM con-
Wire side of female terminals
nector terminals Al0 and A23
individually.
Check for an open in the wire or
bulb (MIL line) :
Repair open in the wire(s)
1. Turn the ignition switch OFF.
"-
NO
between PCM and G101 (located
2. Connect the PCM connector
Is there less than 1.0 V?
/'
at the thermostat housing that
terminal AlB to body ground
had more than 1.0 V .
with a jumper wire.
YES
3. Turn the ignition switch ON
(II).
Substitute a known -good PCM
PCM CONNECTOR A (32P)
and recheck.
H
symptom/indica-
tion goes away. r.place the origi-
nal PCM.
11112 3 4 5 61/
V 9 10
111
1121/ 1/ 1516 171 819
20 V
22 23 24 1
1/
1/2
V V V L:::::::.
-
Repair open in the wires
MIL
"-
NO
between PCM (A18) and gauge
(GRNI JUMPER WIRE
Is the Mil on?
/'
ORN)
assembly.
YES
- Replace the MIL bulb.
Substitute a known-good PCM
Wire side of female terminals
and recheck. If symptom/indica-
tion goes away. replace the origi-
nal PCM.
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