Mass Air Flow (Maf) And Intake Air Temperature (Iat) Sensor Inspection; Vacuum Tank Assembly Inspection (For J20 Engine) - Suzuki Grand Vitara Service Manual

Installation
Reverse removal procedure noting the followings.
• Tighten MAF and IAT sensor screws to specified
torque.
Tightening torque
MAF and IAT sensor screw (a): 1.5 N·m (0.15 kgf-
m, 1.1 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
–20 °C (–4 °F): 13.6 – 18.4 kΩ
20 °C (68 °F): 2.21 – 2.69 kΩ
60 °C (140 °F): 0.493 – 0.667 kΩ
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(a)
I5JB0A130034-02
S5JB0A1306021
[C]: Upper limit
[D]: Resistance
Vacuum Tank Assembly Inspection (For J20
Engine)
Do not apply vacuum more than –86 kPa (–
12.47 psi); otherwise intake manifold tuning
vacuum solenoid valve and vacuum tank
could be damaged.
Intake manifold tuning vacuum solenoid valve
1) With ignition switch OFF, disconnect connector from
vacuum solenoid valve.
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Engine Electrical Devices:
1
5
4
[D]
[C]
[B]
(2.45)
[A]
(0.58)
0 20 40
32 68 104
[E]
[A]: Lower limit
[B]: Nominal
[E]: Temperature
5. Temperature gauge
CAUTION
!
1C-14
3
2
60 80
140 176
I4RS0A130012-01
S5JB0A1306030