Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 113

1C-12 Engine Electrical Devices: For Petrol Engine Model

Crankshaft Position (CKP) Sensor Removal and 
Installation

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For J20 Engine
Removal

1) Remove transmission assembly from vehicle 

referring to “Automatic Transmission Assembly 
Dismounting and Remounting in Section 5A” or 
“Manual Transmission Assembly Dismounting and 
Remounting: For Petrol Engine Model in Section 
5B”“Manual Transmission Assembly Dismounting 
and Remounting: For Petrol Engine Model in Section 
5B”.

2) Remove drive plate or flywheel from crankshaft.
3) Disconnect connector from crankshaft position 

sensor.

4) Remove crankshaft position sensor (1) from cylinder 

block (2).

Installation
Reverse removal procedure noting the following.
• Apply engine oil to O-ring of sensor.
• Tighten CKP sensor bolt to specified torque.

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

• Connect connector and fix wire harness with clamp 

securely.

For M16 Engine
Removal

1) Disconnect negative cable at battery.
2) Remove generator drive belt, loosen pivot bolt and 

move generator outward.

3) Disconnect connector from crankshaft position 

sensor.

4) Remove crankshaft position sensor (1) from cylinder 

block.

Installation

1) Install crankshaft position sensor to cylinder block. 

Tighten CKP sensor bolt to specified torque.

Tightening torque
CKP sensor bolt  (a):  10 N·m (1.0 kgf-m, 7.5 lb-ft)

2) Connect connector to CKP sensor securely.
3) Adjust generator drive belt tension referring to 

“Water Pump and Generator Drive Belt Tension 
Inspection and Adjustment (For M16 Engine): For 
Petrol Engine Model in Section 1J”.

4) Connect negative cable to battery.

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(a)

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Engine Electrical Devices: For Petrol Engine Model 1C-13

Crankshaft Position (CKP) Sensor Inspection

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For J20 Engine
Waveform Check
Using oscilloscope, check that CKP sensor signal is 
outputted properly referring to “Reference waveform 
No.20” and “Reference waveform No.21” of “Inspection 
of ECM and Its Circuits: For Petrol Engine Model in 
Section 1A”.
If sensor signal is outputted properly, CKP sensor is in 
good condition.

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

are free from any metal particles and damage.

Resistance check
Measure resistance between “1” and “2” terminals of 
CKP sensor.

CKP sensor resistance
480 – 660 

Ω at 20 °C, 68 °F

If measured resistance is out of specified value, replace 
CKP sensor.

For M16 Engine
Visual check
• Check that O-ring is free from damage.
• Check that end face of sensor and signal pulley tooth 

are free from any metal particles and damage.

Performance check

1) Remove metal particles on end face of CKP 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 CKP sensor.
If resistance does not vary as specified below, 
replace CKP sensor.

CKP sensor resistance
Resistance varies from less than 220 

Ω (ON) to 

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

Ω (ON)

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1

2

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1C-14 Engine Electrical Devices: For Petrol Engine Model

Knock Sensor Removal and Installation

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Removal

1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) For M16 engine, remove starting motor referring to 

“Starting Motor Dismounting and Remounting: For 
Petrol Engine Model in Section 1I”.

4) Disconnect knock sensor connector (1).
5) Remove knock sensor (2) from cylinder block.

Installation
Reverse removal procedure for installation.

Tightening torque
Knock sensor (a):  22 N·m (2.2 kgf-m, 16.0 lb-ft)

Control Relay Inspection

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Control Relay

1) Disconnect negative cable at battery.
2) Remove main relay (1), fuel pump relay (3), starting 

motor control relay (2), throttle actuator control relay 
(4) and HO2S heater relay (5) (for M16 engine) from 
fuse box No.2 (6) and/or relay box (7).

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 to 
terminal “A” of relay. Check for continuity between 
terminal “C” and “D”. If there is no continuity when 
relay is connected to the battery, replace relay.

2, (a)

1

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

8. Integration relay No.2

"D"

"B"

"A"

"C"

[A]

[B]

3

1

8

3

1

5

2

2

6

6

4

7

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Engine Electrical Devices: For Petrol Engine Model 1C-15

Integration Relay No.2 (For J20 Engine)

1) Disconnect negative cable at battery.
2) Remove included in integration relay No.2 (1) from 

fuse box No.2 (2).

3) Check that there is no continuity between terminals 

“E41-1” and “E37-8” of relay.
If there is continuity, replace relay.

4) Connect battery positive (+) terminal to “E37-7” 

terminal of relay. Connect battery negative (–) 
terminal to “E37-6” terminal of relay. Check for 
continuity between terminal “E41-1” and “E37-8”. If 
there is no continuity when relay is connected to the 
battery, replace integration relay No.2.

Mass Air Flow (MAF) and Intake Air 
Temperature (IAT) Sensor On-Vehicle 
Inspection

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NOTE
Before performed this inspection, be sure to 
read the “Precautions of ECM Circuit 
Inspection: For Petrol Engine Model in 
Section 1A”.

 

1) Disconnect MAF and IAT sensor connector.
2) Connect voltmeter to “BLU/BLK” wire terminal (2) of 

MAF and IAT sensor connector (1) disconnected and 
ground.

3) Turn ON ignition switch and check that voltage is 

battery voltage.
If not, check if wire harness is open or connection is 
poor.

4) Turn OFF ignition switch and connect connector to 

MAF and IAT sensor.

5) Connect special tool between ECM and ECM 

connector referring to “Inspection of ECM and Its 
Circuits: For Petrol Engine Model in Section 1A”. 

[A]: A/T relay
[B]: HO2S heater relay

[C]: Compressor relay

2

1

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1

1

2

3

4

5

6

7

8

1

2

3

4

5

6

7

8

E41

E41

E41

E37

E38

“E37-6”

[A]

[B]

[C]

“E41-1”

“E37-8”

“E37-7”

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