|
|
EC-226 < DTC/CIRCUIT DIAGNOSIS > [VK56VD] P0128 THERMOSTAT FUNCTION P0128 THERMOSTAT FUNCTION DTC Logic INFOID:0000000006288286 DTC DETECTION LOGIC NOTE: Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: ° C (14 ° F) or higher. • For best results, perform at engine coolant temperature of –10 ° C (14 ° F) to 52 ° C (126 ° F). • Before performing the following procedure, do not add fuel. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE WITH CONSULT-III 1. Turn A/C switch OFF. 2. Turn blower fan switch OFF. 3. Turn ignition switch ON. 4. Select “COOLAN TEMP/S” in “DATA MONITOR” mode with CONSULT-III. 5. Check the indication of “COOLAN TEMP/S”. ° C (126 ° F), go to next step. If it is above 52 ° C (126 ° F), cool engine down to less than 52 ° C (126 ° F). Then go to next step. 6. Start engine and drive vehicle for 10 consecutive minutes under the following conditions. CAUTION: Always drive vehicle at a safe speed. ° C (160 ° F) within 10 minutes, turn ignition switch OFF because the test result will be OK. 7. Check 1st trip DTC. WITH GST Follow the procedure “With CONSULT-III” above. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause P0128 THERMSTAT FNCTN The engine coolant temperature does not • Thermostat Vehicle speed More than 56 km/h (35 MPH) |