be sure m otor is 1.6L and not 1.8L SOHC versas DOHC.
TPS is reading low,
bad TPS or needs to be calibrated.
IAT sensor on Air cleaner top is unpluged or dont reading less then 200 ohms
or way more than 10,000 ohms ( 10k is Nome Alaska times 10 lower)
IAT errors is saying IAT IS OPEN or disconnected (high = high impedance or high voltage caused by same)
740 , is wrong, re scan it.
i looked in ECU tables FSM and A/T tables , its not there, but i dont have 98 FSM.
couldnt even find a P0x40 at all.
maybe it was P0400 EGR, which is a top fail for this car.
P0xxx the P0 prefix is the federal standard for ECU codes.
p0340 , cam shaft position sensor.?
the federal def. of 740 is TCC fail , but i think Suzuki does not use that code.
if you rescan it, and it shows 740, then its real , TCC fail.
and my book is too old .
did you pull wires with key on? if you did these are false codes stored in memory
reset ECU DTC codes.
and run motor for a week or until CEL comes on back on , then pull codes.
never pull sensors hot, unless you have good way to reset the ECU.
Pulling battery for 1 hr, will do same..
or 15mins may be enough but you must let all capacitors drain below .4 v inside ecu.
hope that helps.
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