Honda 1986 GoldWing GL1200A Manual page 83

Remove the top compartment. Disconnect the green
PBR sensor coupler and the white PBl sensor coupler.
Connect the inspection 8dapter between the PB sensor
couplers.
Tum the ignition switch ON and measure the input
voltage between the red and green adapter leads.
Input voltage (under atmospheric pressure): 4.75 -5.25 V
If there
IS
no voltage, inspect the wiring harness for an
open circuit.
Check for continuity between the No. 29 ECU terminal
and the adapter red lead.
If the above test results indicate no problem. measure in·
put voltage between the #1 and #2 terminals of the ECU
coupler.
If
all voltage readings are correct, install a new
ECU.
PBSENSOR
COUPLERS
PBR SENSOR
INSPECTION ADAPTER
/
RED LEAD (..)
DIGITAL CIRCUIT TESTER
Disconnect the vacuum tube from the PB sensor. Turn
the Ignition switch ON. Measure the output voltage bet-
ween the white (+) and green (-) inspection adapter
leads.
Output voltage (under atmospheric pressure):
3.58-4.02 V
Connect a hand vacuum pump to the PB sensor and
apply vacuum.
Turn the ignition switch ON. While maintaining the
vacuum, measure the output voltage between the white
and green adapter leads.
The PB sensor is OK
if
the voltage readings fall within the
limits shown below.
TEST VACUUM
OUTPUT VOLTAGE
mm Hg
kPa
kglcm 2
psi
100 13.73
014 193
2.65-3.50V
300 40.21
041 5.83
2.16·2.45V
500 66.69
066 9.67 , .21·1.40V
(cont'd)
INSPECTION ADAPTER
I
VACUUM PUMP
WHITE LEAD (+)
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