Page 657 of 2103
.
Volume air flow sensor (with built-in intake air tem-perature and baro-metric pressure sensor)
Page 658 of 2103
- T h r o t t l e sensor built-inclosed
on coil
temperature sensor
Page 659 of 2103
neutralposition switch
I
Check engine/malfunction
indicator lamp
Dataconnector
o x v a e n,
(front)
.
Page 660 of 2103
Volume air flow sensor
side connector
Intake air temper-
ature sensor
FUEL INJECTION
AND FUEL PUMP RELAY
1.
2.
3.
4.
5.
Remove the relay.
Check the continuity between the
Inspection terminals
2 - 4
Continuity
70
Use the jumper leads to connect relay terminal 4 to
battery terminal and terminal to termi-
nal.
Check the continuity between relay 1 3 while
connecting and disconnecting the
‘at bat-
tery terminal.
Jumper leadContinuity 3
ConnectedContinuity
Disconnected No continuity
If there is a defect, replace
relay.
.
INTAKE AIR TEMPERATURE SENSOR CHECK
13106260676
1.Disconnect the volume air flow, connectors.
2. Measure resistance between
5
Temperature
(32)
20 (66)
60 (176)5.3-6.7
3.Measure resistance while heating the sensor using a hair
drier.
Temperature
Higher
4. If resistance does not decrease as heat the
resistance remains unchanged, replace the volume ai r
flow sensor assembly.
Page 661 of 2103
COOLANT SENSOR
Caution
Be careful not to touch the tool against the
(resin section) when and
1.Remove engine coolant temperature sensor from the in-,
take manifold.
2.With temperature sensing portion of engine tem-
perature sensor immersed in hot water, check resist ance.
,
Temperature
(32)
20 (66)
40 (104)
60 (176)
Resistance
2.1-2.7
3.If the resistance deviates from the standard value greatly,
replace the sensor.
4. Apply sealant threaded-‘portion. ,
Specified sealant:
NUT locking Part No. 4171 or equivalent,
5. Install engine coolant temperature sensor
it to specified torque.
Sensor tightening torque: 30 Nm (22
6. Fasten harness connectors securely.
Page 662 of 2103

Throttle position
sensor connector
Throttle positionsensor connector
THROTTLE, POSITION SENSOR CHECK
1. Disconnect the throttle position sensor connector.
2.Measure the resistance between the throttle position sen-
sor side connector terminal 1 and terminal 4.
Standard value: 3.5-6.5
3. Measure the resistance between throttle sen-
sor side connector terminal 2 and terminal 4.
Throttle valve slowly Changes in pro-
fully open from the idle portion to
of .
4. If the resistance is outside the or if
doesn’t change smoothly, replace the
sensor.
NOTE
Always adjust the throttle position sensor after re place-
ment.
CLOSED THROTTLE POSITION
13100330033
1. Disconnect the throttle connector.
2.Check the continuity between the sensor
connector side terminal 3 and terminal .
Accelerator pedal
DepressedNon-conductive
Released Conductive (0
3.If out of specification, replace the throttle posit
ion
NOTE
After replacement, the closed throttle position swi tch and
throttle position sensor should be adjusted.
(Refer to
Page 663 of 2103

sensor equipmentside connector
HEATED OXYGEN SENSOR CHECK
1. Disconnect the heated sensor and con-
the special tool harness) to the on,
the heated oxygen sensor
2.Make sure that there is continuity [Approx. 12
between terminal 1 (red clip special tool) and
terminal 3 (blue clip of special tool) on the heate d oxygen
sensor connector.
3.If there is no continuity, replace the heated oxyge n sensor.
4.Warm up the engine until engine coolant is
or higher.
5. Use the jumper wires to connect terminal 1 (red clip)
of the heated oxygen sensor connector to the batter y
terminal and terminal 3 (blue clip) to the battery
terminal.
Caution
Be very careful when connecting the jumper wires;
incorrect connection can damage the heated oxygen
sensor.
6.
7.
8.Connect a digital voltage meter between terminal 2 (black
clip) and terminal 4 (white clip).
While repeatedly racing the
heated
oxygen sensor
voltage.
Standard value
,
w n e n ,
engineing the engine.@-
. .
age of
If the sensor is defective,’ replace the
s e n s o r .
NOTEFor removal and installation of the
sensor,
refer to the following sections:
GROUP 15 Exhaust Engine
l GROUP 15 Exhaust Pipe and Main
Engine>
Page 664 of 2103

ENGINE (TURBO)
ENGINE>of Components’
1. Disconnect the heated oxygen sensor connector.
2.Make sure that there is continuity [approx. 12 at
between terminal 3 and terminal on
oxygen sensor connector.
3.If there is no continuity, replace the heated oxyge n sensor.
NOTE
1. the scan tool dose not display ‘the standard
although no abnormality is found by the above men-
tioned continuity test and harness check, replace t he
heated oxygen sensor (rear).
2. For removal and installation of the oxygen senso r,
refer to GROUP 15
Exhaust Pipe, Main-Muffler.
INJECTOR CHECK
Measurement of Resistance between Terminals
1. Remove the injector connector.
2. Measure the resistance between terminals.
Standard value: 2-3
[at
Engine (Turbo)>
13-16
[at
Engine>
3. Install the injector connector
Checking operation sound Using a stethoscope or long blade screwdriver, chec k the
operation sound (“tick-tick-tick”) of injectors dur ing idling or
during cranking
Check that as the engine speed increases, the frequ ency
of the operating sound also increases.
Caution
Note that even if the injector you are checking is not
operating, you will hear the operating sound of the other
injectors.
NOTE
If no operating sound is heard from the injector th at being
checked, check the injector drive circuit. If there is nothing
wrong with the circuit, a defective injector or ECM is suspected