1A-46 Engine General Information and Diagnosis:
Inspection of ECM and Its Circuits
S5JB0E1104080
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 “Engine Control Module (ECM) Removal and Installation: in Section
1C in related manual”.
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 performed this inspection, be sure to read the “Precautions of ECM Circuit Inspection: in
related manual”.
Viewed from harness side
1
2
3
(A)
I5JB0A110073-01
E23 C37
34
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
834
1819
5671011
1720
47 46495051
2122
52
1625
9
24
14
29
5557 54 53
59
60 58
2
262728
15
30
56 48
32 31343536374042 39 38
44
45 43 41 33
11213
23
8
I4RS0A110055-01
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