Page 665 of 2103
RESISTOR CHECK Engine (Turbo)>;
T e r m i n a l s
1. Disconnect the resistor connector.
2. Measure the resistance between terminals.
Measuring terminalsResistance
4-3
5-3
6-3
3.
If the resistance is out of specification, replace the resistor.
ai r
I D L E A I R MO T O R )
CHECK Engine (Turbo
1. Check to be sure that the engine coolant tempera ture
is
or below.
NOTE
Disconnecting the engine coolant temperature sensor
connector and connecting the harness-side of the co nnec-
tor to another engine coolant temperature sensor th at
is at
or below is also okay.
2. Check that the operation sound of the stepper mo tor
can be heard after the ignition is ON (but without
starting the motor), then
3.If the operation sound cannot be heard, check the
motor’s activation circuit.
If the circuit is normal, it is probable that there, is
tion of the stepper of the engine module.
Page 666 of 2103

Checking the Coil Resistance
1.Disconnect the idle air control motor connector and con-
nect the special tool (test harness).
2. Measure the resistance between terminal 2 (white , clip
of the special tool) and either terminal
(red clip) or
terminal 3 (blue clip) of the connector at the idle control
motor side.
Standard [at
3. Measure the resistance, between terminal (green clip
of the special tool) and either terminal 6 (yellow clip.)
or terminal 4 (black clip) of the connector at the idle air
control motor side.
Operational Check
1. Remove the throttle body.
2. Remove the stepper motor. 3. Connect the special tool (test harness) to the i dle air
control motor connector.
4. Connect the positive a power supply
(approx.
to the white clip and the green clip.
5.With the idle air control motor as shown’in
connect the negative terminal. of the power supply
to each clip as described in the following steps, a nd check
whether or not a vibrating’feeling (a-feeling of ve ry slight
vibration of the stepper motor) is generated as a r esult
of the activation of the stepper motor.
(1) Connect the negative terminal of the power supply
to the red and black clip.
(2) Connect the negative terminal of the power supply
to the blue and black clip.
(3) Connect the negative terminal of the power supply
to the blue and yellow clip.
(4) Connect the negative terminal of the power supply
to the red and yellow clip.
(5) Connect the negative terminal of the power supply
to the red and black clip.
(6) Repeat the tests in sequence from (5) to’ (1).
6. If, as a result of these tests, vibration is det ected, the
stepper motor can be considered to be normal.
Page 667 of 2103
IDLE AIR CONTROL (DC: MOTOR)
CHECK
Engine>
Use a stethoscope or long blade screwdriver to chec k if the
operating sound of the idle air control’ motor can
immediately after the ignition switch is turned to
NOTE
If the motor operation cannot be heard, check the m otor
drive circuit and the idle air control motor.
FUEL PRESSURE SOLENOID CHECK
Engine (Turbo)>
NOTE
When disconnecting the vacuum hose, always a mark’
so that it can be reconnected at original position! 1. Disconnect the vacuum hose from the solenoid val ve.
2. Disconnect the harness connector.
Page 668 of 2103
Connect a hand vacuum pump to the nipple.
Connect a battery to the solenoid valve and apply a vacu-
um to check air-tightness.
Battery voltage
Not applied
Applied nipple
Open
Closed
Open Normal condition
Vacuum leaks
Vacuum maintained
Vacuum maintained
Measure the resistance between the terminals of the sole-
noid valve.
Standard value: 36-44
[at
3.
4.
5.
EVAPORATIVE EMISSION PURGE SOLENOID
CHECK
Refer to GROUP 17 Emission Control System.
EGR SOLENOID CHECK13100570152
Refer to GROUP 17 Emission control System. Engine
(Turbo)>
Refer to GROUP 17 Emission Control System.
Engine>
WASTE GATE SOLENOID
Refer to GROUP 15 On-vehicle Service.
Page 669 of 2103
REMOVAL AND INSTALLATION
Operation
lFuel Line Pressure Reduction (Refer to l Spark Plug Cable Removal
Post-installation Operation Spark Plug Cable Installationl Fuel Leakage Inspection
E n g i n e >
Engine (Turbo)>
I:
Engine
Engine>
fuel hose connection
Fuel return hose connection4.Vacuum hose connection
r e g u l a t o r
PCV hose 8. Injector connectors
9.Fuel rail10.Insulators11.Insulators 12. Injectors13.O-rings14.Grommets
Page 670 of 2103

( T U R B O )
Remove the fuel rail (with the attached it.)
Caution ,
Do not drop the injector.
. . .
Fuel rail
INSTALLATION SERVICE POINTS
INJECTORS INSTALLATION
(1) Apply a small amount of clean engine oil to the O-ring.
Caution
Donot let the engine oil get into the fuel rail.
(2) While
injector to the left and right, install it
to the fuel rail.
(3) Check to be sure that the injector turns smooth ly.
If it does not turn smoothly, the O-ring may be tra pped,
remove the injector and then, re-insert it into the fuel rail
and check once again.
FUEL PRESSURE REGULATOR
(1) Apply a small amount of clean engine oil to a n ew
and insert it to the fuel rail carefully.
Do not let the engine oil get into rail.
(2) If the fuel pressure regulator does
the O-ring may be folded.Then, remove regulator
to check the O-ring for damage.
(3) Tighten the regulator to the specified
Tightening torque: 8.8 Nm ‘(6.5
HIGH-PRESSURE FUEL
When connecting the high-pressure fuel hose to the fuel rail,
apply a small amount of clean engine oil to the hose union,
and then insert, being careful not
damage ‘the O-ring.,
Do not let the engine into
,
Page 671 of 2103
E N G I N E ( T U R B O )
AND ENGINE>
REMOVAL AND INSTALLATION
(Refer to 17 Service.)
Engine (Turbo)>
2 A . .
4.93.6
Removal steps
1. Accelerator cable connection2. Air hose Engine (Turbo)>3. Air intake hose Engine>4. TPS connector
5. motor connector
6. Vacuum hose connection 7. Heater hose connection
8. Charge air
cooler fitting Engine Gasket Engine10. Throttle body 11. Throttle body gasket
INSTALLATION SERVICE POINT.
BODY GASKET INSTALLATION
Install the throttle body gasket so that the projec tion is where
shown in the illustration.
Caution
Poor idling etc. may result if the throttle body ga sket
is installed incorrectly.
Page 672 of 2103
DISASSEMBLY AND REASSEMBLY
Englne (Turbo)>
4
1.4
,
I
1. Throttle position Sensor (with in closed position switch)2. air control motor
3. O-ring4. Throttle body
,