LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2020 >> RAV4 LE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 154 (Engine Control System (A25A-FXS) (W/ Canister Pump Module) - Diagnostic Codes (03 Of 13)) >> SFI SYSTEM (w/ Canister Pump Module) >> DTC P0128-00: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature); DTC P0128-07: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) Mechanical Failure [02/2019 - 06/2020] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different variant/trim than selected.
JUDGMENT BY SIMULATED ENGINE COOLANT TEMPERATURE

Duration that both of the following conditions are met 5 seconds or more
(a) Estimated engine coolant temperature 75°C (167°F) or higher
(b) Engine coolant temperature sensor output Less than 75°C (167°F)
JUDGMENT BY ENGINE COOLANT TEMPERATURE AND NO. 2 ENGINE COOLANT TEMPERATURE CHANGES (W/ GRILLE SHUTTER SYSTEM)

Engine coolant temperature change speed Less than -0.4°C/sec (-0.72°F/sec), or higher than 0.15°C/sec (0.27°F/sec)
Engine coolant temperature Less than 75°C (167°F)
Grade of engine coolant temperature - No. 2 engine coolant temperature Higher than -0.1°C/sec (-0.18°F/sec), and less than 0.1°C/sec (0.18°F/sec)
Absolute engine coolant temperature - No. 2 engine coolant temperature Less than 6.6°C (11.8°F)
JUDGMENT BY ENGINE COOLANT TEMPERATURE CHANGE AT HIGH VEHICLE SPEED (W/O GRILLE SHUTTER SYSTEM)

Malfunction counter 3 times or more
Malfunction counter is incremented when following conditions are met A and B
A. Average engine coolant temperature change (vary with current engine coolant temperature, estimated ambient air temperature, intake air mass and vehicle speed) Less than 0.01°C/sec (0.018°F/sec)
B. Engine coolant temperature is satisfied throughout this period Less than 75°C (167°F)