EG–425 ENGINE – 2JZ–GE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT: If diagnostic trouble codes "22" (engine coolant temperature sensor circuit), "24" (intake air temperature sensor circuit) and "41" (throttle position sensor circuit) are output simultaneously, E2 (sensor ground) may be open. 1 Check voltage between terminals THW and E2 of engine control module con– nector. ON SST ECM B 44, 65 E2 THW BE6653 FI6499 P (1) Connect SST (check harness "A"). (See page EG–404) (2) Turn ignition switch ON. C Measure voltage between terminals THW and E2 of engine control module connector. OK Engine Coolant Temp. °C (°F) Voltage 20 (68) (Engine is cool) 0.5 – 3.4 V 80 (176) (Engine is hot) 0.2 – 1.0 V NG OK Check for intermittent problems. (See page EG–399) 2 Check engine coolant temp. sensor. P Disconnect the engine coolant temp. sensor connector. C Measure voltage between terminals. OK Resistance is within Acceptable Zone on chart. Resistance kΩ 30 20 6 3 2 1 0.5 0.3 0.2 0.1 Acceptable Engine Coolant Temp. °C(°F) Resistance 20 (68) 2 – 3 kΩ 80 (176) 0.2 – 0.4 kΩ -20 0 20 40 60 80 100 (-4) (32)(68)(104)(140)(176)(212) Temp. °C (°F) FI4178 OK NG Replace engine coolant temp. sensor. 3 Check for open and short in harness and connector between engine control module and engine coolant temp. sensor (see page IN–30). OK NG Repair or replace harness or connector. Check and replace engine control module.