Sole-Vac Idle Speed Relay Test - Jeep 1987 Wrangler Workshop Manual

ENGINES
FUEL FEEDBACK SYSTEMS
DIAGNOSTIC T E S T 11
SOLE-VAC IDLE S P E E D RELAY T E S T
S E E
I.S.
N
O
T
E
S
DISCONNECT IDLE SPEED RELAY CONNECTOR AND START ENGINE DETERMINE IF
BATTERY VOLTAGE IS APPLIED ACROSS PINS 85 AND 86 OF RELAY CONNECTOR DURING
THE FIRST 60 SECONDS OF OPERATION.
NO
DETERMINE IF VOLTAGE IS
APPLIED ACROSS PIN 86
AND ENGINE GROUND.
YES
NO
REPAIR VOLTAGE SUPPLY
MALFUNCTION AND
RETEST.
TURN ENGINE OFF.
DISCONNECT MCU
HARNESS CONNECTOR
AND TEST CONTINUITY
BETWEEN PIN 85 AND
MCU CONNECTOR PIN
43.
REPAIR OPEN CIRCUIT AND
RETEST.
YES
r
REPLACE MCU AND
RETEST
DETERMINE IF VOLTAGE IS
APPLIED ACROSS PIN
30/51 AND ENGINE
GROUND.
YES
REPAIR VOLTAGE SUPPLY
MALFUNCTION AND
RETEST.
TURN ENGINE OFF AND
CONNECT IDLE SPEED
RELAY CONNECTOR.
START ENGINE AND
DETERMINE IF VOLTAGE IS
APPLIED ACROSS PIN 87
AND ENGINE GROUND
DURING THE FIRST 6 0
SECONDS OF OPERATION.
REPLACE IDLE SPEED
RELAY AND RETEST.
IF SOLE-VAC IS STILL NOT
OPERATING, CHECK FOR
OPEN CIRCUIT BETWEEN
PIN 87 OF IDLE SPEED
RELAY AND SOLE-VAC
CONNECTOR. IDLE SPEED
RELAY TEST COMPLETE.
83085R(J)
B-2S0