Toyota 1KZ-TE Repair Manual page 123

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INSPECTION PROCEDURE
HI NT:
If DTC22, 24 and 39 are output simultaneously, E2 (sensor ground) may be open.
S
Read freeze frame data using hand--held tester, as freeze frame data records the engine conditions
S
when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle
was running or stopped, the engine was warmed up or not, the air--fuel ratio was lean or rich, etc. at
the time of the malfunction.
W hen using hand - - held tester :
1 Connect hand - - held tester, and read value of water temperature.
PREPARATION:
(a) Connect the hand--held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand--held tester main switch ON.
CHE CK:
Read the temperature value on the hand--held tester.
OK:
Same value as the actual water temperature.
HI NT:
If there is open circuit, hand--held tester indicates --40˚C (--40˚F).
S
If there is short circuit, hand--held tester indicates 140˚C (284˚F) or more.
S
OK
Che c k for i nte rmi tte nt probl e m s
DI - - 9 ).
2 Check for open in harness or engine ECU.
ON
Water
Temp. Sensor
*: E5 (Hilux), E6 (Land Cruiser/Land
Cruiser Prado) or E16 (4Runner)
BE6653
A12232
NG
1KZ- -TE ENGINE SUP (RM790E)
DIAGNOSTICS
(S e e pa ge
PREPARATION:
(a)
Engine ECU
(b)
5 V
(c)
4
2
THW
CHE CK:
*
Read the temperature value on the hand--held tester.
9
E2
*
E1
OK:
1
A12237
- - ENGINE
- - 4 0 ˚C (- -40˚F) ... Go to step 2.
NG
140˚C (284˚F) or more ...
Disconnect the water temperature sensor connector.
Connect the sensor wire harness terminals together.
Turn the ignition switch ON.
Temperature value: 140˚C (284˚F) or more
OK Confirm good connection at sensor.
If OK, replace water temperature sensor.
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Go to step 4.
CONTINUED
DI- -59