Throttle Position Sensor (Tps) Test - 2.46L - Jeep 1987 Wrangler Workshop Manual

mG
THROnLE BODY FUEL INJECTION SYSTEM
m G mG
1.4L 1986-1987/1.7L/2.46L
m G
Tl HROTTLE POSITION S E N S O
(TPS) T E S T — 2.46L ONLY
DISCONNECT THE WIRE CONNECTOR
AT THE TPS. CHECK VOLTAGE AT TPS
CONNECTOR PINS B (GROUND) AND C
(5.0 VOLT SUPPLY) WITrfKEY "ON".
R
TURN KEY OFF. CHECK
FOR CONTINUITY BETWEEN ECU
CONNECTOR PIN 16 AND TPS
CONNECTOR TERMINAL (C).
CONNECT THE TPS WIRE CONNECTOR
TO THE TPS. CHECK VOLTAGE AT TPS
CONNECTOR TERMINALS A (+) AND B
(GROUND) WITH KEY "ON" AND THROTTLE
PLATE AT WIDE OPEN THROTTLE*
CHECK FOR CONTINUITY
BETWEEN ECU CONNECTOR
PIN 13 AND PIN B OF
THE TPS CONNECTOR.
REPAIR THE TPS WIRE
HARNESS POWER SUPPLY
CIRCUIT BETWEEN THE ECU
AND THE TPS AND RETEST.
YES NO
TPS SWITCH AND
ADJUSTMENT OK
REPAIR TPS WIRE
HARNESS GROUND CIRCUIT
BETWEEN THE ECU AND
THE TPS AND RETEST.
ADJUST OUTPUT
VOLTAGE TO
4.6-4.7 VOLTS.
SE
I.!
c
1
E
c
TPSAND
YES
WIRING OK.
CHECK FOR CONTINUITY
BETWEEN ECU CONNECTOR
PIN 31 AND THE TPS
CONNECTOR PIN A.
REPAIR TPS WIRE
HARNESS BETWEEN ECU
AND TPS AND RETEST.
YES NO
REPLACE THE
THROTTLE POSITION
SENSOR (TPS) AND
ADJUST OUTPUT VOLTAGE.
REPLACE ECU
AND RETEST.
DO NOT UNFASTEN THE SENSOR WIRE HARNESS CONNECTOR. INSERT
THE VOLTMETER TEST LEADS THROUGH THE BACK OF THE WIRE HARNESS
CONNECTOR TO MAKE CONTACT WITH THE SENSOR TERMINALS. ON SOME
MODELS, IT MAY ALSO BE NECESSARY TO REMOVE THE THROTTLE BODY
FROM THE INTAKE MANIFOLD, TO GAIN ACCESS TO THE SENSOR WIRE
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