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Throttle position sensor (TP sensor)
INSPECTION
1) Disconnect negative cable at battery and connector from TP
sensor.
2) Using ohmmeter, check resistance between terminals under
each condition given in table below.
If check result is not satisfactory, replace TP sensor.
TP sensor resistance
3) Connect TP sensor connector securely.
4) Connect negative cable to battery.
REMOVAL
1) Remove throttle body from intake manifold referring to
“Throttle Body” in this section for removal.
2) Remove TP sensor from throttle body.
INSTALLATION
1) Install TP sensor (1) to throttle body.
Fit TP sensor to throttle body in such way that its holes (3)
are a little away from TP sensor screw holes (2) and turn TP
sensor clockwise so that those holes align.
Tightening torque
TP sensor screws (a) : 2.5 N·m (0.25 kg-m, 1.8 lb-ft)
2) Connect connector to TP sensor securely.
3) Connect battery negative cable to battery.TERMINALS RESISTANCE
Between 1 and
3 terminals4.0 – 6.0 k
Ω
ΩΩ Ω
Between 2 and
3 terminals20.0
Ω
ΩΩ Ω – 6.0 k
Ω
ΩΩ Ω, varying according to
throttle valve opening.
NOTE:
There should be more than 2 k
Ω
ΩΩ Ω resistance difference
between when throttle valve is at idle position and when
it is fully open.
1. Reference voltage terminal
2. Output voltage terminal
3. Ground terminal
Page 636 of 687
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Intake air temperature sensor (IAT sensor)
REMOVAL
1) Disconnect battery negative cable at battery.
2) Disconnect connector from IAT sensor (1).
3) Remove IAT sensor (1) from air cleaner case (2).
INSPECTION
Immerse temperature sensing part of IAT sensor in water (or ice)
and measure resistance between sensor terminals while heating
water gradually.
If measured resistance doesn’t show such characteristic as
shown in left figure, replace IAT sensor.
INSTALLATION
Reverse removal procedure noting the following.
Clean mating surfaces of IAT sensor and air cleaner case.
Connect IAT sensor connector (1) securely.
Page 637 of 687

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Engine coolant temperature sensor (ECT sensor)
REMOVAL
1) Disconnect battery negative cable at battery.
2) Drain coolant referring to Step 6) of “Cooling System Flush
and Refill” in Section 6B.
3) Disconnect connector from ECT sensor.
4) Remove ECT sensor (1) from water outlet cap.
INSPECTION
Immerse temperature sensing part of ECT sensor (1) in water (or
ice) and measure resistance between terminal “A” and “B” while
heating water gradually.
If measured resistance doesn’t show such characteristic as
shown in left figure, replace ECT sensor (1).
INSTALLATION
Reverse removal procedure noting the following:
Clean mating surfaces of ECT sensor (1) and water outlet
cap.
Check O-ring for damage and replace if necessary. WARNING:
To help avoid danger of being burned, do not remove
radiator cap while engine and radiator are still hot.
Scalding fluid and steam can be blown out under pres-
sure if cap is taken off too soon.
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Tighten ECT sensor (1) to specified torque.
Tightening torque
ECT sensor (a) : 15 N·m (1.5 kg-m, 11.5 lb-ft)
Connect connector to ECT sensor (1) securely.
Refill coolant referring to “Cooling System Flush and Refill”
in Section 6B.
Heated oxygen sensor (Sensor-1 and sensor-2)
OXYGEN SENSOR HEATER INSPECTION
1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance between terminals
“V
B” and “GND” of sensor connector.
If found faulty, replace oxygen sensor.
Resistance of oxygen sensor heater
HO2S-1 : 5.0 – 6.4
Ω
ΩΩ Ω at 20 °C, 68 °F
HO2S-2 : 11.7 – 14.3
Ω
ΩΩ Ω at 20 °C, 68 °F
3) Connect sensor connector securely.
REMOVAL
NOTE:
Temperature of sensor affects resistance value largely.
Make sure that sensor heater is at correct temperature.
1. Viewed from terminal side
WARNING:
To avoid danger of being burned, do not touch exhaust
system when system is hot. Oxygen sensor removal
should be performed when system is cool.
Page 639 of 687

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1) Disconnect negative cable at battery.
2) For sensor-1, remove exhaust manifold cover (1) and dis-
connect connector of heated oxygen sensor and release its
wire harness from clamps.
3) For sensor-2, disconnect connector of heated oxygen sensor
and release its wire harness from clamp. Hoist vehicle and
then remove exhaust No.1 pipe covers (3).
4) Remove heated oxygen sensor (2) from exhaust manifold or
exhaust No.1 pipe.
INSTALLATION
Reverse removal procedure noting the following.
Tighten heated oxygen sensor (2) to specified torque.
Tightening torque
Heated oxygen sensor (a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
Connect connector of heated oxygen sensor (2) and clamp
wire harness securely.
After installing heated oxygen sensor (2), start engine and
check that no exhaust gas leakage exists.
Camshaft position sensor
INSPECTION
Check camshaft position sensor referring to “DTC P0340 (No. 15)
Diag. Flow Table” in Section 6. If malfunction is found, replace.
REMOVAL
1) Disconnect negative cable at battery.
2) Disconnect connector from camshaft position sensor.
3) Remove camshaft position sensor from cylinder head.
INSTALLATION
1) Check that O-ring is free from damage.
2) Check that camshaft position sensor and signal rotor tooth
are free from any metal particles and damage.
3) Install camshaft position sensor to sensor case.
Tightening torque
Camshaft position sensor bolt
(a) : 10 N·m (1.0 kg-m, 7.5 lb-ft)
4) Connect connector to it securely.
5) Connect negative cable to battery.
[A] : HO2S-1
[B] : HO2S-2
Page 640 of 687
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Crankshaft position sensor
INSPECTION
Check crankshaft position sensor referring to step 2 and 6 of
“DTC P0335 (No.23) Flow Table” in Section 6. If malfunction is
found, replace.
REMOVAL
1) Disconnect negative cable at battery.
2) Remove generator drive belt, loosen pivot bolt and move
generator outward.
3) Disconnect connector from crankshaft position sensor.
4) Remove crankshaft position sensor (1) from cylinder block.
INSTALLATION
1) Check to make sure that crankshaft position sensor and pul-
ley tooth is free from any metal particles and damage.
2) Install crankshaft position sensor to cylinder block.
3) Connect connector to it securely.
4) Adjust generator belt tension, refer to “Water Pump Belt Ten-
sion” in Section 6B.
5) Connect negative cable to battery.
Page 641 of 687

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Vehicle speed sensor (VSS)
INSPECTION
Check vehicle speed sensor referring to step 7 of “DTC P0500
(No.16) Flow Table” in Section 6. If malfunction is found, replace.
Fuel level sensor (GAUGE)
INSPECTION
Refer to “Fuel Meter / Fuel Gauge Unit” in Section 8.
REMOVAL / INSTALLATION
Refer to “Fuel Pump Assembly” in Section 6C.
Knock sensor
INSPECTION
Check knock sensor referring to “DTC P0325 (No.17) Flow Table”
in Section 6. If malfunction is found, replace.
REMOVAL / INSTALLATION
Refer to “Knock Sensor” in Section 6A1.
Main relay, fuel pump relay and A/C condenser fan
control relay
INSPECTION
1) Disconnect negative cable at battery.
2) Remove main relay (1), fuel pump relay (2) and A/C con-
denser fan control relay (3) from vehicle.
3) Check that there is no continuity between terminal “A” and
“B”. If there is continuity, replace relay.
4) Connect battery positive (+) terminal to terminal “C” of relay.
Connect battery negative (–) terminal “D” of relay.
Check continuity between terminal “A” and “B”.
If there is no continuity when relay is connected to the bat-
tery, replace relay.
Page 642 of 687

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Fuel cut operation
INSPECTION
1) Warm up engine to normal operating temperature.
2) While listening to sound of injector (1) by using sound scope
(2) or such, increase engine speed to higher than 3,000 r/
min.
3) Check to make sure that sound to indicate operation of injec-
tor stops when throttle valve is closed instantly and it is
heard again when engine speed is reduced to less than
about 2,000 r/min.
A/C condenser fan control system
SYSTEM INSPECTION
Check system for operation referring to “Flow Table B-7” in Sec-
tion 6.
If A/C condenser fan fails to operate properly, check relay, A/C
condenser fan and electrical circuit.
A/C condenser fan
INSPECTION
1) Check continuity between each two terminals.
If there is no continuity, replace A/C condenser fan motor. NOTE:
Before inspection, check to make sure that gear shift
lever is in neutral position (with A/T model, selector lever
in “P” range), A/C is OFF and that parking brake lever is
pulled all the way up.
WARNING:
Keep hands, tools, and clothing away from A/C con-
denser fan to help prevent personal injury. This fan is
electric and can come on whether or not the engine is
running. The fan can start automatically in response to
the ECT sensor with the ignition switch in the “ON” posi-
tion.