Jeep J-10 Series 1982 Technical & Service Manual page 435

FUEL SYSTEMS U-121
CONTINUED
FROM PREVIOUS
PAGE
CONTINUED
FROM PREVIOUS
PAGE
ALLOW AIR CLEANER AIR
TEMPERATURE TO HEAT TO
66°F AND RETEST.
i
TEST FOR CONTINUITY
BETWEEN PIN 4 AND MCU
CONNECTOR PIN 14.
DISCONNECT MCU
CONNECTOR AND RETEST.
YES
DISCONNECT WOT SWITCH
CONNECTOR AT
CARBURETOR AND
RETEST.
£
REPLACE MCU AND
RETEST.
DEPRESS ACCELERATOR
PEDAL TO WIDE OPEN
THROTTLE POSITION
MONITORING CONTINUITY
BETWEEN PINS 4 AND 14.
REPLACE TES AND RETEST.
REPAIR SHORT CIRCUIT IN
WOT SWITCH WIRE
HARNESS.
INSPECT CARBURETOR
LINKAGE AND ENSURE
SWITCH IS BEING
ENGAGED.
NO ^X*V.
| REPAIR AND RETEST. |
REPAIR OPEN CIRCUIT IN
WOT SWITCH WIRE
HARNESS. ENSURE THERE
IS CONTINUITY BETWEEN
WOT SWITCH AND MCU
CONNECTOR PIN 17.
YES
REPLACE* WOT SWITCH
AND RETEST.
REPAIR SHORT CIRCUIT IN
TES WIRES AND RETEST.
DISCONNECT MCU AND
RETEST.
OPEN'
CIRCUIT
NO ^ YES
REPLACE WOT SWITCH
AND RETEST.
REPLACE MCU AND
RETEST.
DISCONNECT WOT
SWITCH CONNECTOR AND
CONNECT JUMPER WIRE
BETWEEN WIRE HARNESS
CONNECTOR TERMINALS.
RETEST FOR CONTINUITY.
•NOTE: THE WOT SWITCH
IS DIFFICULT TO REPLACE.
BEFORE REMOVING THE
SWITCH CONNECT A
REPLACEMENT SWITCH TO
THE WIRE HARNESS
CONNECTOR AND RETEST
TO ENSURE ORIGINAL
SWITCH IS FAULTY.
YES
REPEAT SEVERAL TIMES
UNTIL SATISFIED SWITCH
IS FUNCTIONING
NORMALLY.
START ENGINE AND
ALLOW TO WARM FOR 4
MINUTES WHILE TESTING
CONTINUITY BETWEEN
DIAGNOSTIC CONNECTOR
PIN 2 AND MCU
CONNECTOR PIN 14. THE
METER JNDICATION
SHOULD CHANGE FROM
OPEN CIRCUIT TO CLOSED
CIRCUIT AS THE ENGINE
WARMS (3 TO 6 MINUTES).
81131C