MARUTI SUZUKI Wagon R, Manual

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Engine General Information and Diagnosis: Bi-Fuel LPG model 1A-66
Inspection of ECM and Its Circuit
AENAR90A1104052
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”: .
31 32 33 34 35 36 37 38 39 40 41 42 43
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
30
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26
[A]
C01 E01
A
29 28
I9R90A112029-01
[A]: ECM connector (View: A)
Terminal No. Wire color Circuit Normal voltage Condition
C01-1* BRN
Fuel injector No.2
control circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
) / )
Engine: Idle speed after
warming up
C01-2* BRN/YEL
Fuel injector No.1
control circuit
10 – 14 V Ignition switch: ON
0 – 1 V
↑ ↓
10 – 14 V
) / )
Engine: Idle speed after
warming up
C01-3 — — — —
C01-4 — — — —
C01-5 — — — —
C01-6 — — — —
C01-7 — — — —
C01-8 BLK ECM ground circuit Below 0.3 V Ignition switch: ON
C01-9* BLU
Knock sensor signal
circuit 2 – 3 V
)
Engine: Running at 4,000
rpm after warming up
C01-10 GRN
Knock sensor ground
circuit
Below 0.3 V Ignition switch: ON
C01-11 GRY/RED
TP sensor power
supply circuit
4.5 – 5.5 V Ignition switch: ON
C01-12* BLU/BLK
EVAP canister purge
valve control circuit
0 – 1 V
↑ ↓
10 – 14 V
)
EVAP canister purge valve:
10% open (using active test
of SUZUKI scan tool)
C01-13* YEL/RED
HO2S heater control
circuit
0 – 1 V
↑ ↓
10 – 14 V
)
Engine: Idle speed after
warming up