MARUTI SUZUKI Wagon R, Manual

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1A-75 Engine General Information and Diagnosis: Bi-Fuel LPG model
Inspection of LPG Control Module and Its Circuit
AENAR90A1104053
Voltage Check
NOTE
• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition
switch is turned to ON position.
• Terminal No. with asterisk (*) cannot be measured with voltmeter because it is pulse signal. Use
oscilloscope for its check if necessary.
• Before performing this check, be sure to read “Precaution for ECM and LPG Control Module Circuits
Inspection”: Bi-Fuel LPG model.
• For identification of each cylinder, refer to “Cylinder Identification Description”: .
3 4 5 6 7 9 2 1 8
[A]
A
12 13 14 15 16 11 10 17
C13 E485
20 21 22 23 24 26 19 18 25
29 30 31 32 33 28 27 34
3 4 5 6 7 9 2 1 8
12 13 14 15 16 11 10 17
20 21 22 23 24 26 19 18 25
29 30 31 32 33 28 27 34
IAR90A110049-01
[A]: LPG control module connector (View: A)
Terminal No. Wire color Circuit Normal voltage Condition
C13-1 WHT/BLK
LPG fuel injector No.1
control circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
) / )
Engine: Idle speed after
warming up
Fuel select mode: Forced
LPG MODE
C13-2 — — — —
C13-3 — — — —
C13-4 — — — —
C13-5 BLU/RED
Petrol fuel injector
No.3 control circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
) / )
Engine: Idle speed after
warming up
Fuel select mode: Petrol
MODE
C13-6 BLU/YEL
Petrol fuel injector
No.1 control circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
) / )
Engine: Idle speed after
warming up
Fuel select mode: Petrol
MODE
C13-7 WHT/GRN
Fuel injector No.3
control signal from
ECM circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
)
Engine: Idle speed after
warming up
C13-8 BRN/YEL
Fuel injector No.1
control signal from
ECM circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
)
Engine: Idle speed after
warming up
C13-9 BLK
LPG control module
ground circuit
Below 0.3 V Ignition switch: ON