Jeep J-10 Series 1982 Technical & Service Manual page 436

U-122 FUEL SYSTEMS
CONNECT JUMPER WIRE
BETWEEN PINS A AND B
OF COOLANT
TEMPERATURE SWITCH
CONNECTOR(HARNESS
SIDE) AND RECHECK PINS
2 AND 14 ON DIAGNOSTIC
CONNECTOR FOR CLOSED
CIRCUIT.
REPAIR CONTINUITY
PROBLEM IN COOLANT
SWITCH CIRCUIT. ENSURE
THAT CONTINUITY ALSO
EXISTS AT MCU PIN 6.
RECHECK.
YES
RETURN ENGINE TO IDLE
SPEED. DISCONNECT
VACUUM SWITCH
ASSEMBLY AND PLACE
JUMPER WIRE BETWEEN
PINS A AND B OF VACUUM
SWITCH CONNECTOR
(HARNESS SIDE) AND
RETEST CONTINUITY
BETWEEN PINS 1 AND 14.
CONTD.
REPLACE COOLANT
SWITCH AND RETEST.
DETERMINE IF PORTED
VACUUM IS AT VACUUM
SWITCH 2. THERE SHOULD
BE NO VACUUM AT IDLE
SPEED. REPAIR AND
RETEST.
CONTD.
CONTINUED
FROM PREVIOUS
PAGE
REMOVE THROTTLE FROM
FAST IDLE CAM POSITION
AND ALLOW ENGINE TO
RETURN TO NORMAL IDLE
SPEED. ADJUST IDLE
SPEED IF NECESSARY
ACCORDING TO IDLE
SPEED ADJUSTMENT
PROCEDURE.
TEST CONTINUITY
BETWEEN DIAGNOSTIC
CONNECTOR PIN 1 AND
MCU CONNECTOR PIN 14.
INCREASE ENGINE SPEED
TO 2000 RPM. TEST
CONTINUITY BETWEEN
PINS 1 AND 14.
CONTINUITY SHOULD
EXIST.
81131D
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