keep in mind this is tbi... iic tbi doesn't have IAC valve it just has the stepper motor that adjusted the throttle position at idle (ISA).
to test the tps use the fallowing procedure from FSM:
Throttle Position Sensor (TPS) Test
Turn ignition on. Check voltage at terminal connector
without disconnecting from TPS. Terminal "A" (M/T), or terminal "B"
(A/T ) is output voltage, which should be 4.6-4.7 volts at wide open
throttle (M/T), or .2 volt at closed throttle (A/T). Terminal "B"
(M/T), or terminal "A" (A/T) is sensor ground. Terminal "C" (M/T), or
terminal "D" (A/T) is input voltage, which is about 5 volts.
may also want to check out the closed throttle switch (which i haven't seen in any diagrams or looked for on my jeep but there is a test procedure for it)...(edit: from further reading sounds like the closed throttle switch is part of the AIS motor
http://jeepgarage.free.fr/OWN/fuel%20injection%20system%20tbi.pdf)
Closed Throttle (Idle) Switch Test
NOTE: ALL testing of idle switch must be done with ISA motor
plunger in fully extended position. If switch cannot be
tested without extending plunger, it is possible that ISA
motor has failed. See IDLE SPEED ACTUATOR MOTOR ADJUSTMENT.
1) Turn ignition on. Check idle switch voltage at diagnostic
connector D2, between terminals No. 13 and 7. See Fig. 4. At closed
throttle, voltage should be near zero volts. When switch is off
closed throttle position, voltage reading should be greater than 2
volts.
2) If voltage is always zero, test for short to ground in
harness or switch. Also check for open circuit between switch and
terminal No. 25 of ECU connector. If reading is always greater than 2
volts, check for open circuit in wiring harness between switch
connector and ECU. Also check for open between ground and switch
connector. Replace or repair wiring harness as necessary.
