3.
Verify IAT voltage to change while raising or lowering simulation voltage with scan tool within 0.5~3.5 V.
a.
Specification: If the data is changeable as simulation voltage changes, it’s OK
The purpose of checking ECM is to determine whether there is any malfunction in ECM .
ECTS connect and Turn ignition switch to ON.
Probe(+) : ECTS harness connector NO4.
Probe(-) : Chassis ground.
Verify IAT voltage to change while raising or lowering simulation voltage with scan tool within 0.5~3.5 V.
Specification: If the data is changeable as simulation voltage changes, it’s OK
Is temperature data changing within specification?
YES
Temporarily install a known good ECTS and check for proper operation.
If problem is corrected, replace ECTS.
NO
ECM internal faulty.
Repair as necessary and go to "Verification of Vehicle Repair"
