Check IATS resistance
IG "OFF".
Disconnect IATS connector.
Measure resistance between terminal 3 and 4 of IATS connector(Component Side)
Specification :
Temp.[℃] | Resistance [Ω] | Temp.[℃] | Resistance [Ω] |
-40±1 | 40931~ 48352 | 60±1 | 543 ~ 616 |
-20±1 | 13890 ~ 16025 | 70±1 | 396 ~ 452 |
0±1 | 5384 ~ 6085 | 80±1 | 294 ~ 337 |
20±1 | 2311 ~ 2565 | 90±1 | 221 ~ 256 |
30±1 | 1564 ~ 1736 | 100±1 | 169 ~ 196 |
40±1 | 1077 ~ 1205 | 110±1 | 130 ~ 153 |
50±1 | 758 ~ 854 | 120±1 | 102 ~ 120 |
Is the measured resistance within specification ?
YES
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage. So, check poor connections and the related circuit between ECM and component thoroughly. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Substitute with a known - good IATS and check for proper operation.
If the problem is corrected, replace IATS and go to "Verification of Vehicle Repair" procedure.
