2001 SUZUKI GRAND VITARA temperature sensor

ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE) 6E2-5
1. Air cleaner 22. Fuel level sensor 39. A/C controller (if equipped)
2. Intake air temp. sensor 23. Monitor connector (if equipped) 40. Data link connector/Immobilizer control mod-
ule (if equipped)
3. Mass air flow sensor 23-1. Diag. switch terminal 41. ABS control module
4. EVAP canister purge valve 23-2. Test switch terminal 42. Main relay
5. Throttle position sensor 23-3. Output duty select switch terminal 43. Ignition switch
6. Idle air control valve 23-4. Duty output terminal 44. Park/Neutral position switch in TR switch (A/T)
7. Camshaft position sensor 24. Fuel filter 45. Battery
8. EGR valve 25. Fuel pressure regulator 46. Starter magnetic switch
9. Manifold absolute pressure sensor
(if equipped)26. Immobilizer indicator lamp (if equipped) 47.“O/D OFF” lamp (A/T)
10. Fuel injector 27. Tank pressure control valve 48.“POWER” lamp (A/T)
11. PCV valve 28. EVAP canister 49. Lighting switch (A/T)
12. Ignition coil assembly 29. Knock sensor 50. Stop lamp switch (A/T)
13. Engine coolant temperature sensor 30. ECM/PCM (Engine control module/Powertrain con-
trol module)51. O/D cut switch (A/T)
14. Heated oxygen sensor
(bank 1 sensor 1) (if equipped)31. Malfunction indicator lamp 52. POWER/NORMAL change switch (A/T)
15. Heated oxygen sensor
(bank 2 sensor 1) (if equipped)32. Electric loads (rear defogger (if equipped), lighting) 53. 4WD low switch (A/T)
16. Heated oxygen sensor
(bank 1 sensor 2) (if equipped)33. Power steering pressure switch 54. Transmission range switch (A/T)
17. Heated oxygen sensor
(bank 2 sensor 2) (if equipped)34. Heater blower fan switch 55. Solenoid valve A (A/T)
18. Warm-up three way catalytic converter
(if equipped)35. Cruise control module 56. Solenoid valve B (A/T)
19. Three way catalytic converter
(if equipped)36. Vehicle speed sensor 57. TCC solenoid valve (A/T)
20. Crankshaft position sensor
(if equipped)37. Combination meter 58. A/T input speed sensor (A/T)
21. Fuel pump 38. A/C condenser fan relay (if equipped) 59. A/T vehicle (output) speed sensor (A/T)

6E2-34 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Intake air temperature (IAT) sensor
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Disconnect IAT sensor coupler.
3) Remove IAT sensor from air cleaner case.
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 the figure, replace IAT sensor.
INSTALLATION
1) Clean mating surface of sensor and seal (2) on air cleaner
case.
2) Install IAT sensor (1) into seal.
3) Connect connector to IAT sensor securely.

6E2-36 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
Engine coolant temperature sensor (ECT sensor)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Drain cooling system.
3) Disconnect coupler from ECT sensor (1).
4) Remove ECT sensor from water outlet cap (2).
INSPECTION
Immerse temperature sensing part of ECT sensor in water and
measure resistance between sensor terminals while heating
water gradually.
If measured resistance doesn’t shown such characteristic as
shown in the figure, replace ECT sensor.
INSTALLATION
Reverse removal procedure noting the followings.
•Clean mating surfaces of sensor and water outlet cap (1).
•Use new O-ring.
•Tighten ECT sensor to specified torque.
Tightening torque
ECT sensor (a) : 15 N·m (1.5 kg-m, 11.0 lb-ft)
•Connect coupler to sensor securely.
•Refill cooling system.

6E2-38 ENGINE AND EMISSION CONTROL SYSTEM (SEQUENTIAL MULTIPORT FUEL INJECTION FOR H27 ENGINE)
HEATER INSPECTION
1) Disconnect HO2S-1 or -2 coupler.
2) Using ohmmeter, measure resistance between terminals
“VB” and “GND” of HO2S coupler (1).
If found faulty, replace HO2S.
Resistance of HO2S heater:
11.7 – 14.3 Ω
ΩΩ Ω (at 20 °C (68 °F)) for HO2S-2
5.0 – 6.4 Ω
ΩΩ Ω (at 20 °C (68 °F)) for HO2S-1
3) Connect HO2S coupler securely.
Heated oxygen sensor (sensor 2)
REMOVAL
1) Disconnect negative (–) cable from battery.
2) Disconnect coupler (3) of oxygen sensor(s).
3) Remove oxygen sensor(s) (2) from exhaust manifold(s) (1).
INSTALLATION
Reverse removal procedure noting the followings.
•Tighten oxygen sensor(s) to specified torque.
Tightening torque
Heated oxygen sensor 2 (a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
•Connect connector of oxygen sensor(s) and clamp wire har-
ness securely.
•After installing oxygen sensor(s), start engine and check that
no exhaust gas leakage exists. NOTE:
Temperature of HO2S affects resistance value largely.
Make sure that HO2S heater is at correct temperature.
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.
NOTE:
Be careful not to expose it to excessive shock.

INSTRUMENTATION/DRIVER INFORMATION 8C-1
8C
SECTION 8C
INSTRUMENTATION/DRIVER INFORMATION
CONTENTS
General Description ........................................8C-2
Combination Meter ........................................8C-2
On-vehicle Service ..........................................8C-4
Fuel Meter/Fuel Gauge Unit ..........................8C-4
Fuel level sensor (sender gauge) ..............8C-4
Engine Coolant Temperature (ECT) Meter
and Sensor ....................................................8C-5Engine coolant temperature sensor .......... 8C-5
Oil Pressure Light ......................................... 8C-5
Oil pressure switch .................................... 8C-5
Brake Warning Light ..................................... 8C-5
Brake fluid level switch .............................. 8C-5

WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
For the descriptions (items) not found in this section, refer to the same section of the Service Manual
mentioned in the FOREWORD of this manual.

INSTRUMENTATION/DRIVER INFORMATION 8C-5
Engine Coolant Temperature (ECT) Meter and
Sensor
Engine coolant temperature sensor
REMOVAL AND INSTALLATION
Refer to “ECT SENSOR” in Section 6E2.
Oil Pressure Light
Oil pressure switch
REMOVAL AND INSTALLATION
Refer to “OIL PRESSURE CHECK” in Section 6A2.
Brake Warning Light
Brake fluid level switch
INSPECTION
Use an ohmmeter to check switch for continuity.
If found defective, replace switch (reservoir).
Brake fluid level switch specification
OFF position (float up) : No continuity
ON position (float down) : Continuity