Inspection Of Ecm And Its Circuits - Suzuki Swift Sport 2004 Service & Repair Manual

Inspection of ECM and Its Circuits

ECM and its circuits can be checked by measuring voltage, pulse signal and resistance with special tool connected.
CAUTION
!
ECM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ECM
with ECM connectors disconnected from it.
Voltage Check
1) Remove ECM (1) from its bracket referring to "ECM Removal and Installation in Section 1C".
2) Connect special tool between ECM and ECM connectors securely.
Special tool
(A): 09933–06320
3) Check voltage and/or pulse signal using voltmeter (2) and oscilloscope (3).
NOTE
• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition
switch is turned ON.
• Voltage with asterisk (*) cannot be measured with voltmeter because it is pulse signal. Use
oscilloscope for its check if necessary.
• Before this inspection, be sure to read the "Precautions of ECM Circuit Inspection".
15 14 13 12 11
30 28 27 26
29
45 44 43 42 41
59
60 58 57 56
2
Viewed from harness side
E23
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
Engine General Information and Diagnosis:
1
I5RS0C110023-01
2 1 15 14 13 12 11
17 16 30 28 27 26
29
32 31 45 44 43 42 41
59
47 46 60 58 57 56
(A)
3
C37
10 9 8 7 6 5 4 3
25 24 23 22 21 20 19 18
40 39 38 37 36 35 34 33
55 54 53 52 51 50 49 48
1A-175
S7RS0B1104079
2 1
17 16
32 31
47 46
I4RS0A110055-01