Suzuki Grand Vitara JB419. Service manual — part 37

Engine Electrical Devices: 1C-9

Engine Coolant Temperature (ECT) Sensor
Inspection

S5JB0B1306012

1) Remove ECT sensor referring to “Engine Coolant

Temperature (ECT) Sensor Removal and
Installation”.

2) Immerse temperature sensing part of ECT sensor in

water and measure resistance between sensor
terminal (1) and (2) while heating water gradually.
If measured resistance doesn’t show such
characteristic as shown, replace ECT sensor.

ECT sensor resistance

Camshaft Position (CMP) Sensor Removal and
Installation

S5JB0B1306013

Removal

1) Disconnect negative cable at battery.
2) Remove injector cover referring to “Cylinder Head

Cover Removal and Installation in Section 1D”.

3) Remove CMP sensor (1) from generator upper

bracket support.

Installation
Reverse removal procedure for installation noting the
following.
• Clean CMP sensor and protrusion of camshaft pulley

before installation.

• Tighten throttle body to EGR valve pipe to specified

torque.

Tightening torque
Throttle body to EGR valve pipe: 21 N·m (2.1 kgf-
m, 15.5 lb-ft)

Water temperature

°C (°F)

Resistance (k

Ω)

25 (77)

2.140 – 2.364

50 (122)

0.770 – 0.850

80 (176)

0.272 – 0.288

[A]: Resistance
[B]: Temperature

I4SN0A132012-01

1

I5JB0B130005-01

1C-10 Engine Electrical Devices:

Crankshaft Position (CKP) Sensor (Engine
Speed Sensor) Removal and Installation

S5JB0B1306014

Removal

1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) Disconnect connector (1) from CKP sensor (2).
4) Remove CKP sensor from transmission case.

Installation
Reverse removal procedure for installation noting the
following.
• Clean CKP sensor and sensor rotor teeth before

installation.

• Tighten CKP sensor bolt to specified torque.

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

Crankshaft Position (CKP) (Engine Speed
Sensor) Sensor Inspection

S5JB0B1306015

1) Remove CKP sensor referring to “Crankshaft

Position (CKP) Sensor (Engine Speed Sensor)
Removal and Installation”.

2) Check that CKP sensor (1) and sensor rotor tooth (2)

are free from any metal particles and damage.

3) Check that resistance between terminals of CKP

sensor is within specification.
If resistance is not as specified, replace CKP sensor.

CKP sensor resistance
612 – 748

Ω at 20°C, 68°F

1

2

I5JB0B130007-01

(a)

I5JB0B130008-01

I5JB0B130009-02

I5JB0B130010-01

Engine Electrical Devices: 1C-11

Boost Pressure Sensor Removal and
Installation

S5JB0B1306020

Removal

1) Disconnect negative cable at battery.
2) Disconnect connector (1) from boost pressure

sensor (2).

3) Remove boost pressure sensor from throttle body to

EGR valve pipe.

Installation
Reverse removal procedure for installation noting the
following.
• Check boost pressure sensor O-ring for damage.

If malfunction is found, replace boost pressure sensor.

Main Relay and Fuel Heater Relay Inspection

S5JB0B1306022

1) Disconnect negative cable at battery.
2) Remove main relay (1) and fuel heater relay (2) from

relay connector.

3) Check that there is no continuity between terminal

“c” and “d”.
If there is continuity, replace relay.

4) Connect battery positive (+) terminal to terminal “b”

of relay. Connect battery negative (–) terminal “a” of
relay.
Check continuity between terminal “c” and “d”.
If there is no continuity when relay is connected to
the battery, replace relay.

Pre-Heating Unit Removal and Installation

S5JB0B1306023

Removal

1) Disconnect negative cable at battery.
2) Disconnect pre-heating unit connector (1).
3) Remove pre-heating unit (2) from bracket.

Installation
Reverse removal procedure for installation.

2

1

I5JB0B130011-01

1

2

I5JB0B130012-01

I4SN0A132024-01

2

1

I5JB0B130013-01

1C-12 Engine Electrical Devices:

Boost Pressure Control Solenoid Valve
Removal and Installation

S5JB0B1306029

Removal

1) Disconnect negative cable at battery.
2) Detach boost pressure control solenoid valve (1).
3) Disconnect boost pressure control solenoid valve

connector (2) and hoses (3) from boost pressure
control solenoid valve.

Installation
Reverse removal procedure for installation.

Boost Pressure Control Solenoid Valve
Inspection

S5JB0B1306030

1) Remove boost pressure control solenoid valve

referring to “Boost Pressure Control Solenoid Valve
Removal and Installation”.

2) Check the resistance between terminals of boost

pressure control solenoid valve is within
specification.
If resistance is not as specified, replace boost
pressure control solenoid valve.

Boost pressure control solenoid valve resistance
14.7 – 16.1

Ω at 20 °C, 68 °F

3) Apply vacuum 80 kPa (0.8 kg/cm

2

11.5 psi) to boost

pressure control valve using special tool.
If vacuum can be applied, go to the next step.
If not, replace boost pressure control valve.

Special tool
(A): 09917–47011

4) Connect 12 V battery to boost pressure control valve

terminals. In this state, apply vacuum 80 kPa (0.8 kg/
cm

2

11.5 psi) to the outlet nozzle using a special tool.

If vacuum can not be applied, boost pressure control
valve is in good condition.
If not, replace boost pressure control valve.

Special tool
(A): 09917–47011

1

3

2

I5JB0B130014-02

I5JB0B130015-01

(A)

“a”

“b”

I5JB0B130016-02