Honda CR-V 1997 Service Manual page 289

(From page 11-86)
I
Check for an open in the wir"
IIGPHn .. ):
1. Disconnect the fuel injector and
lAC valve connectors.
2. Turn the
ignition
switch ON
(II) .
3. Measure voltage between
body ground and ECM/PCM
connector terminals 81 and
89 individually.
<
"-
NO
Is there battery vottage1
' - - - - -------,- - - - - / ' /
YES
Checlc: for an open in the wires
IPG. LG
lines):
1. Reconnect the fuel injector
and lAC valve connectors.
2. Measure voltage between
body ground and ECM!PCM
connector terminals B2. Bl0.
820 and B22 individually.
Is there less than 1.0 V1
YES
Check for a short In the wires
(VCC1. VCC2l1nes):
Measure voltage between body
ground and ECMJPCM connector
terminals C19
and C28
indivtduaUy.
Is there approx. 5 V1
YES
Substitute a known-good ECMI
PCM and recheck. If symptom!
indication go •• away, replac.
tha original ECM/PCM.
NO
./
NO
- Repair open In the wire(s)
b.tween the ECM/PCM IB1.
B9)
and the PGM-FI main
relay.
- Check for poor connections
or loose wires at the PGM-FI
main relay.
- Test the PGM-FI main relay
Isee page 11 -1871.
Rapair open In the wirels)
batween the ECM/PCM and
Gl0l (located at the thermostat
houo4ng) that hod
mono than 1.0 V.
Check for a short In a sensor:
While measuring voltage
between body ground and ECM!
PCM connector terminals C19
and C28 individually, disconnect
the 3P connector of each sensor
one
at
time:
• MAP sensor
• TP sensor
• Fuel tank pressure sensor
Is there approx. 5 V?
YES
Replace the sensor that had
aPf)rOx. 5 V.
ECM/PCM CONNECTOR B (25P)
IGP1
(VEl/BLK)
+~Gj ~:
II
:YEl/BLK)
3 • 5
V I/i
81
11
/ 13 1/1/1/ 17 i/1
~~
23 /
/l
Wire side of female terminals
,..,-r_L1PG-,
1
(BLK)
1 2 3
4 5
/ 1 /81
9 ,. 11
/13
/ I/ V
17171
19
12.~21
22
231/1/
V PG2 V
~ ~
LG2 (BAN/BLK)
- (BLK) - '{ '{
NO
- = -
lG1 (BRN/BlK)
ECM/PCM CONNECTOR C (31
P)
1,23[7 SV7 891/
1 / 1/1/1/1 / '6 17 18 '9 2. 21 22
23 D 25
26~
228 29 30 31
VCC2
V V
VCC1
(YEl/BLU)
~ ~
(YEL/RED)
Wire side of
female terminals
Repair short in the wire between
the MAP sensor, TP sensor. Fuel
tank pressure sensor and the
ECM/PCM (C19. C28).
(cont'd)
11-87