100%
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.