19-31 Electrical System Troubleshooting z Error codes 04-1, 04-2 (Coolant temperature sensor abnormality) Related portion A35 AG1 G16 Probable cause c Coolant temperature sensor defect d Harness defect e Engine controller defect Error codes 04-1 and 04-2 Connector contact defect Water temperature sensor defect Harness defect Engine controller defect Inspection 1: Carry out coolant temperature sensor individual inspection. Ignition key switch OFF, disconnect A35 and G16 Standard:
(Sensor side) Section 19 Engine controller 19 (THW) 1 2 (THW) REC TAB 28 (E2) 1 (E2) Coolant temperature sensor EC B R TA Disconnect the battery negative terminal (for more than 10 seconds), after inspecting and correcting disconnection and water entry of G16, AG1, reconnect all connectors and the battery negative terminal, turn the ignition key switch ON (start the engine) and check whether or not there is an error. No error Error Inspection 1: Water temperature sensor individual inspection OK Inspection 2: Harness continuity and short circuit inspection OK G16-1 ~ G16-2 2.45 ± 0.24 kΩ (20°C) 0.32 ± 0.03 kΩ (80°C)