Suzki Burgman AN400. Manual - part 75

8-22     ELECTRICAL SYSTEM

Step 2
1) Measure the battery voltage between input lead wire (O/W and B/W) at the ECM with the ignition switch 

in the “ON” position.
Is the voltage OK?

Step3
Measure the ignition coil primary peak voltage. (

!

8-23)

NOTE:
The ignition coil peak voltage inspection method is applicable only with the multi circuit tester and peak volt
adaptor.

Is the peak voltage OK?

Step4
1) Inspect the spark plug. (

!

2-7)

Is the spark plug OK?

Step5
1) Inspect the ignition coil. (

!

8-24)

Is the ignition coil OK?

Step6
1) Measure the CKP sensor peak voltage and its resistance.

NOTE:
The CKP sensor peak voltage inspection is applicable only with the multi circuit tester and peak volt adaptor.

Is the peak voltage and resistance OK?

YES

Go to Step3.

NO

• Faulty ignition switch.
• Faulty turn signal/side-stand switch relay.
• Faulty ignition switch.
• Broken wire harness or poor connection of related circuit couplers.

YES

Go to Step4.

NO

Go to Step5.

YES

• Improper spark plug connection.
• Go to Step5.

NO

Faulty spark plug.

YES

Go to Step6.

NO

Faulty ignition coil.

YES

• Faulty ECM.
• Faulty wire harness.
• Improper ignition coupler connection.

NO

Faulty CKP sensor.

ELECTRICAL SYSTEM     8-23

IGNITION SYSTEM INSPECTION

IGNITION COIL PRIMARY PEAK VOLTAGE INSPECTION

• Remove the foot board. (

!

7-19)

• Disconnect spark plug cap.
• With the spark plug cap connected, place a new spark plug on

the engine to ground it.

NOTE:
* Check that all the couplers are connected.
* Check that the all battery is fully charged.

Measure the ignition coil primary peak voltage using the multi
circuit tester in the following procedure.

• Connect the multi circuit tester with the peak volt adaptor as

follows.

Ignition coil:

 

+ 

Probe: White lead wire connector

 

- 

Probe: Ground

NOTE:
Do not disconnect the ignition coil/plug cap lead wire couplers.

#

09900-25008: Multi circuit tester set

"

• Set the side-stand upright position, and then turn the ignition

switch to the “ON” position.

• Grasp the front or rear brake lever.
• Press the starter button and allow the engine to crank for a

few seconds, and then measure the ignition coil primary peak
voltage.

• Repeat the above procedure a few times and measure the

highest ignition coil primary peak voltage.

'

Tester knob indication: Voltage (

%

)

&

Ignition coil primary peak voltage: 150 V and more

0

If the peak voltage is lower than the specified values, inspect the
ignition coil. (

!

8-24)

Before using the multi circuit tester and peak volt
adaptor, be sure to refer to the appropriate instruction
manual.

Peak bolt
adaptor

To engine
stop switch

Ignition coil

ECM

While testing, do not touch the tester probes and
spark plugs to prevent receiving an electric shock.

DC

Selector

Dial

8-24     ELECTRICAL SYSTEM

IGNITION COIL RESISTANCE INSPECTION

• Remove foot board. (

!

7-19)

• Disconnect the ignition coil read wire.

Measure the ignition coil resistance in both the primary and sec-
ondary windings. If the resistance is not within the standard
range, replace the ignition coil with a new one.

"

09900-25008: Multi circuit tester set

#

Tester knob indication: Resistance (

Ω

Ω

Ω

Ω

)

$

Ignition coil/plug cap resistance

Primary

: 3 – 5 

Ω

Ω

Ω

Ω

 (

 

+

 Terminal – 

 

-

 Terminal)

Secondary: 17 – 30 k

Ω

Ω

Ω

Ω

 (Plug cap – 

 

+

 Terminal) 

CKP SENSOR PEAK VOLTAGE INSPECTION

• Remove the front leg shield. (

!

7-12)

NOTE:
When making this test, be sure that the battery is in fully
charged condition.

• Disconnect the ECM coupler.
• With the lead wire’s fastener 

 

A

 un locked, pull out the lead

wire (G/W, Bl).

• Connect the multi circuit tester with the peak voltage adaptor

as follows.

 

+

 Probe: Green/White lead wire 

 

-

 Probe: Blue lead wire

"

09900-25008: Multi circuit tester set

%

• Set the side-stand upright position, and then turn the ignition

switch to the “ON” position.

• Grasp the front or rear brake.
• Pull the starter button and allow the engine to crank for a few

seconds, and then measure the CKP sensor peak voltage.

• Repeat the above procedure a few times and measure the

highest peak voltage.

&

Tester knob indication: voltage (

'

)

$

CKP sensor peak voltage: 4.5 V and more

If the peak voltage is lower than the specified values, check the
peak voltage at the CKP sensor lead wire coupler.

Before using the multi circuit tester and peak volt
adaptor, be sure to refer to the appropriate instruction
manual.

CKP sensor coupler

CKP sensor

Peak
volt
adaptor

ECM coupler

G/W

Bl

ELECTRICAL SYSTEM     8-25

• Remove the front box. (

!

7-14)

• Disconnect the CKP sensor coupler 

 

1

 and connect the multi

circuit tester with the peak volt adaptor.

 

+ 

Probe: Green lead wire

 

- 

probe: Blue lead wire

Measure the CKP sensor peak voltage at the CKP sensor lead
wire coupler, in the same manner as on the ECM coupler.

'

Tester knob indication: Voltage (

%

)

&

CKP sensor peak voltage: 4.5 V and more

If the peak voltage on the CKP sensor lead wire coupler is ok but
on the ECM coupler is out of specification, the wire harness
must be replaced. If both peak voltages are out of specification,
the CKP sensor must be replaced and re-checked.

CKP SENSOR RESISTANCE INSPECTION

• Remove the front box. (

!

7-14)

• Disconnect the CKP sensor coupler.

Measure the resistance between the lead wires and ground. If
the resistance is not specified value, the CKP sensor must be
replaced.

#

09900-25008: Multi circuit tester set

(

Tester knob indication: Resistance (

Ω

Ω

Ω

Ω

)

&

CKP sensor resistance : 180 – 288 

Ω

Ω

Ω

Ω

 (Green – Blue)

: 

∞

∞

∞

∞

 

Ω

Ω

Ω

Ω

 (Green – Ground)

CKP sensor

Bl

CKP Sensor coupler

Peak
volt
adaptor

G

CKP sensor

CKP Sensor
coupler