Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 112

1C-8 Engine Electrical Devices: For Petrol Engine Model

Engine Coolant Temperature (ECT) Sensor
Removal and Installation

S6JB0A1316008

Removal

1) Disconnect negative cable at battery.
2) Drain coolant referring to “Cooling System Draining:

For Petrol Engine Model in Section 1F”.

WARNING

!

To 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 pressure if cap is taken off too soon.

3) Disconnect connector from ECT sensor (1).

4) Remove ECT sensor from water outlet cap.

Installation
Reverse removal procedure noting the following.
• Clean mating surfaces of ECT sensor and water outlet

cap.

• Check O-ring for damage and replace, if necessary.
• Tighten ECT sensor (1) to specified torque.

Tightening torque
ECT sensor (a): 12.5 N·m (1.25 kgf-m, 9.0 lb-ft)

• Connect connector to ECT sensor securely.
• Refill coolant referring to “Cooling System Flush and

Refill: For Petrol Engine Model in Section 1F”.

Engine Coolant Temperature (ECT) Sensor
Inspection

S6JB0A1316009

Immerse temperature sensing part of ECT 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, replace ECT sensor.

[A]: For J20 engine
[B]: For M16 engine

[A]: For J20 engine
[B]: For M16 engine

[B]

[A]

1

1

I5JB0A130022-03

[B]

[A]

1, (a)

1, (a)

I5JB0A130023-02

[A]: Lower limit

[D]: Resistance

[B]: Normal

[E]: Temperature

[C]: Upper limit

20

0

68

32

104

140

176

40

60

80

[E]

2.29 - 2.62

0.309 - 0.331

[A]

[B]

[C]

[D]

I5JB0A130037-01

Engine Electrical Devices: For Petrol Engine Model 1C-9

Air Fuel Ratio (A/F) Sensor On-Vehicle
Inspection

S6JB0A1316010

Heater

1) Disconnect A/F sensor connector.
2) Using ohmmeter, measure resistance of Sensor

heater between terminals “V

B

” and “GND” at sensor

connector. If found faulty, replace A/F sensor.

NOTE
Temperature of sensor affects resistance
value largely. Make sure that sensor heater is
at correct temperature.

A/F sensor heater resistance
2 – 3

Ω at 20 °C (68 °F)

Viewed from terminal side

3) Connect A/F sensor connector securely.

Adjusting Resistor (J20A Engine)

1) Disconnect A/F sensor connector.
2) Using ohmmeter, measure resistance of adjusting

resistor between terminals “R+” and “R–” at A/F
sensor connector.
If found faulty, replace A/F sensor.

Adjusting resistor resistance
100 – 58000

Ω at 20 °C (68 °F)

Viewed from terminal side

3) Connect A/F sensor connector securely.

Heated Oxygen Sensor (HO2S-2) Heater On-
Vehicle Inspection

S6JB0A1316011

1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance of sensor

heater between terminals “V

B

” and “GND” at sensor

connector.
If found faulty, replace oxygen sensor.

NOTE
Temperature of sensor affects resistance
value largely. Make sure that sensor heater is
at correct temperature.

HO2S heater resistance
5.0 – 6.4

Ω at 20 °C (68 °F)

Viewed from terminal side

3) Connect sensor connector securely.

[A]: J20A engine
[B]: M16A engine

“GND”

[A]

[B]

“V

B

”

I6JB0A131001-02

“R+”

“R

−

”

I5JB0A130002-02

“GND”

“V

B

”

I5JB0A130024-03

1C-10 Engine Electrical Devices: For Petrol Engine Model

Air Fuel Ratio (A/F) Sensor, Heated Oxygen
Sensor (HO2S-2) Removal and Installation

S6JB0A1316012

Removal

WARNING

!

To avoid danger of being burned, do not
touch exhaust system when system is hot. A/
F sensor and/or oxygen sensor removal
should be performed when system is cool.

1) Disconnect negative cable at battery.
2) Disconnect connector of A/F sensor and/or heated

oxygen sensor.

3) Remove A/F sensor (1) and/or heated oxygen

sensor (2) from exhaust No.1 pipe.

Installation
Reverse removal procedure noting the following.
• Tighten A/F sensor (1) to specified torque.

Tightening torque
A/F sensor (a): 45 N·m (4.5 kgf-m, 32.5 lb-ft)

• Tighten heated oxygen sensor (2) to specified torque.

Tightening torque
Heated oxygen sensor (b): 45 N·m (4.5 kgf-m,
32.5 lb-ft)

Camshaft Position (CMP) Sensor Removal and
Installation

S6JB0A1316013

Removal

1) Disconnect negative cable at battery.
2) Disconnect connector from CMP sensor.
3) Remove camshaft position sensor from cylinder

head cover (for J20 engine) or cylinder head (for
M16 engine).

Installation

1) Install camshaft position sensor to cylinder head

cover (for J20 engine) or cylinder head (for M16
engine).

Tightening torque
CMP sensor bolt (a): 11 N·m (1.1 kgf-m, 8.0 lb-ft)

2) Connect connector to CMP sensor securely.
3) Connect negative cable to battery.

1,(a)

2,(b)

I5JB0A130025-02

[A]: For J20 engine
[B]: For M16 engine

(a)

[B]

[A]

(a)

I5JB0A130026-03

Engine Electrical Devices: For Petrol Engine Model 1C-11

Camshaft Position (CMP) Sensor Inspection

S6JB0A1316014

Visual check
• Check that O-ring is free from damage.
• Check that end face of sensor and signal rotor tooth

are free from any metal particles and damage.

Performance check

1) Remove metal particles on end face of CMP sensor,

if any.

2) Arrange 12 V battery (1) and connect its positive

terminal to “Vin” terminal (2) and negative terminal to
“Ground” terminal (3) of sensor. Then using
ohmmeter, measure resistance between “Vout”
terminal (4) of sensor and negative terminal of
battery by passing magnetic substance (iron) (5)
while keeping approximately 1 mm (0.03 in.) gap
with respect to end face of CMP sensor.
If resistance does not vary as specified below,
replace CMP sensor.

CMP sensor resistance
Resistance varies from less than 220

Ω (ON) to

infinity (OFF) or from infinity (OFF) to less than 220

Ω (ON)

I4RS0B130015-01

[A]: For J20 engine
[B]: For M16 engine

I5JB0A130027-01