Mass Air Flow (Maf) And Intake Air Temperature (Iat) Removal And Installation; Mass Air Flow (Maf) And Intake Air Temperature (Iat) Sensor Inspection; Inlet Throttle Valve Removal And Installation; Inlet Throttle Valve On-Vehicle Inspection - Suzuki GRAND VITARA 2005 Service Manual

1C-13 Engine Electrical Devices:
Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Removal and Installation
Removal
1) Disconnect negative cable at battery.
2) Disconnect MAF and IAT sensor connector (1).
3) Remove MAF and IAT sensor (2) from air cleaner
(3).
Installation
Reverse removal procedure noting the followings.
• Tighten MAF and IAT sensor screws to specified
torque.
Tightening torque
MAF and IAT sensor screw: 6 N·m (0.6 kgf-m, 4.5
lb-ft)
• Tighten turbocharger inlet hose clamp to specified
torque.
Tightening torque
Inlet hose clamp: 2.5 N·m (0.25 kgf-m, 2.0 lb-ft)
• Connect MAF and IAT sensor connector securely.
Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Sensor Inspection
CAUTION
!
Do not heat up MAF and IAT sensor more
than 100 °C (212 °F). Otherwise, MAF and IAT
sensor will be damaged.
• Check sensor O-ring (1) for damage and
deterioration. Replace as necessary.
• Blow hot air to temperature sensing part (2) of MAF
and IAT sensor (3) using hot air drier (4) and measure
resistance between sensor terminals while heating air
gradually.
If measured resistance does not show such
characteristic as shown, replace MAF and IAT sensor.
Intake air temperature sensor resistance
10 °C (50 °F): 3.55 – 3.87 kΩ
20 °C (68 °F): 2.35 – 2.54 kΩ
S5JB0B1306033
30 °C (86 °F): 1.61 – 1.73 kΩ
1

Inlet Throttle Valve Removal and Installation

Refer to "Air intake Pipe Removal and Installation: in
2
Section 1D".
3
I5JB0B130018-01

Inlet Throttle Valve On-Vehicle Inspection

!
Do not disassembly inlet throttle valve.
1) Connect SUZUKI scan tool to data link connector
(DLC) with ignition switch OFF.
2) Check that no abnormality is detected in ECM.
Refer to "DTC Check: in Section 1A".
3) Turn ignition switch to ON position and select menu
"Electronic Throttle Control" under "Miscellaneous
test" ("MISC. TEST") mode of SUZUKI scan tool.
Follow the instructions indicated on the SUZUKI
scan tool.
NOTE
For further details, refer to the operator's
S5JB0B1306034
manual for SUZUKI scan tool.
4) Confirm the inlet throttle valve operates five times. If
inlet throttle valve does nit operate, replace inlet
throttle valve referring to "Inlet Throttle Valve
Removal and Installation: ".
!
When replacing inlet throttle valve, perform
"Initialize inlet throttle valve date" mode of
SUZUKI scan tool referring to "Inlet Throttle
Valve Data Initialization: ".
CAUTION
CAUTION
I5JB0B130019-01
S5JB0B1306035
S5JB0B1306036