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On Board Diagnosis Logic NHEC0519 Engine coolant temperature has not risen enough to open the ther- Possible Cause NHEC0520 I Thermostat function I Leakage from sealing portion of thermostat I Engine coolant temperature sensor DTC Confirmation Procedure NHEC0521 NOTE: I For best results, perform at ambient temperature of –10°C I For best results, perform at engine coolant temperature of WITH CONSULT-II NHEC0521S01 1) Replace thermostat with new one. Refer to LC-15, “Thermo- 2) Turn ignition switch “ON”. 3) Select “COOLAN TEMP/S” in “DATA MONITOR” mode with 4) Check that the “COOLAN TEMP/S” is above 60°C (140°F). 5) Drive vehicle for 10 consecutive minutes under the following VHCL SPEED SE 80 - 120 km/h (50 - 75 MPH) If 1st trip DTC is detected, go to “Diagnostic Procedure”, WITH GST NHEC0521S02 1) Follow the prodedure “WITH CONSULT-II” above. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P1126 THERMOSTAT FUNCTION On Board Diagnosis Logic EC-451 |