Jeep 1987 Wrangler Workshop Manual page 513

IKS
ENGINES
FUEL FEEDBACK SYSTEMS
CONTINUED
FROM PREVIOUS
PAGE
CONTINUED
FROM PREVIOUS
PAGE
REPAIR OPEN CIRCUIT IN
WIRE HARNESS TO
VACUUM SWITCH
ASSEMBLY ENSURE
CONTINUITY ALSO
EXISTS AT THE MCU
CONNECTOR PIN 16.
TEST CONTINUITY
BETWEEN DIAGNOSTIC
CONNECTOR D2 PIN 9
AND MCU CONNECTOR
PIN 20 CHECK THAT
MANIFOLD VACUUM IS
AT SWITCH 1 (10 IN
HG SW)
REPLACE VACUUM SWITCH
ASSEMBLY AND RETEST.
YES
TEST COMPLETE, STOP
ENGINE.
DISCONNECT VACUUM
SWITCH ASSEMBLY
CONNECTOR AND PLACE
A JUMPER WIRE
BETWEEN PINS A AND B
OF VACUUM SWITCH
CONNECTOR (HARNESS
SIDE) AND RETEST
CONTINUITY BETWEEN
DIAGNOSTIC CONNECTOR
D2 PIN 9 AND MCU
CONNECTOR PIN 20
S E E
I.S.
N
O
T
E
S
REPLACE VACUUM SWITCH
ASSEMBLY AND RETEST
NO
YES
DISCONNECT MCU
CONNECTOR AND RETEST.
1 r
REPAIR CIRCUIT IN
WIRE HARNESS TO
VACUUM SWITCH
ASSEMBLY.
81131E(J)
B-279