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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.