3.
Has a problem been found?
 | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "Ground Circuit Inspection" procedure. |
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
| ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Ground Circuit Inspection" procedure. |
Ignition "OFF".
Disconnect Battery (-) terminal.
Refer to "Shop Manual" and disconnect IAT Sensor and ECM/PCM connector.
Measure resistance between Pin No. 4 (Ground) terminal of IAT Sensor harness connector and Pin No. 61 (Ground) terminal of ECM/PCM harness connector.
Specification : Approx. below 1 Ω
Connect ECM/PCM connector.
Measure resistance between Pin No. 4 (Ground) terminal of IAT sensor harness connector and chassis ground.
Specification : Approx. below 1 Ω
Is measured value within specification?
| ▶ Go to "Signal Circuit Inspection" procedure. |
| ▶ Repair open or short in ground circuit between IAT Sensor and chassis ground and then go to "Verification of vehicle Repair" procedure. |
Ignition "OFF".
Refer to "Shop Manual" and disconnect IAT Sensor connector.
Ignition "ON".
Measure voltage between Pin No. 3 (Signal) terminal of IAT Sensor harness connector and chassis ground.
Specification : Approx. 5.7 V
Is measured value within specification?
| ▶ Go to "Component Inspection" procedure. |
| ▶ Repair open or short in signal circuit between IAT Sensor and PCM and then go to "Verification of vehicle Repair" procedure. |
