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SEF348N
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
I Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than the ECM
terminals, such as the ground.
SEC893C
I Regarding model A33, “B1” indicates the bank 1 and “B2”
indicates the bank 2 as shown in the figure.
I Bank 1 includes No. 1 cylinder.
Wiring Diagrams and Trouble Diagnosis
NFEC0006
When you read Wiring diagrams, refer to the following:
I GI-11, “HOW TO READ WIRING DIAGRAMS”
I EL-10, “POWER SUPPLY ROUTING” for power distribution circuit
When you perform trouble diagnosis, refer to the following:
I GI-24, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES”
I GI-21, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
PRECAUTIONS
Precautions (Cont’d)
EC-21
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