EG-531 ENGINE – 2JZ-GTE 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 connector. ON SST ECM (B) 44, 65 E2 THW B68853 FI6499 P (1) Connect SST (check harness "A"). (See page EG-510) (2) Turn ignition switch ON C Measure voltage between terminals THW and E2 of engine control module connector. OK Engine Coolant Temp. Voltage °C (°F) 20 (68) 0.5 ~ 3.4 V (Engine is cool) 80 (176) 0.2 ~ 1.0 V (Engine is hot) NG OK Check for intermittent problems. (See page EG-505) 2 Check engine coolant temp. sensor. FI417B P Disconnect the engine coolant temp. sensor con- nector. C Measure resistance between terminals. OK Resistance is within Acceptable Zone on chart. Resistance kΩ 30 20 10 5 3 2 1 0.5 0.3 0.2 0.1 Acceptable Engine Coolant Temp. Resistance °C(°F) 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) 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.