Nissan Sentra B18 (2020-2025) Service Manual: Before Replacing ECM
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SAVE ECM DATA
With CONSULT-
Turn ignition switch OFF.
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Reconnect all harness connectors disconnected.
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Turn ignition switch ON.
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Select “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
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Follow the instruction of CONSULT display.
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Necessary data in ECM is copied and saved to CONSULT.
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Go to Step 2 regardless of with or without success in saving data.
GO TO 2.
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SAVE ‘OPERATION LOG’
With CONSULTSave Operation Log, according to the procedure of “Programming” in CONSULT Operation Manual.
Note:
ECM part number is saved in Operating Log saved in CONSULT.
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Replace ECM.
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After replacing ECM, perform necessary work.
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Other materials:
Operation
Automatic Speed Control Device (ascd)
Switch Name and Function
Switch Name and Function
SWITCHES AND INDICATORS
On the combination
meter
...
Clutch Master Cylinder (clutch Switch)
Component Function Check
Component Function Check
CHECK FUNCTION
CONSULT
Ignition switch ON.
Select “INTELLIGENT KEY” mode of
“BCM”.
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P0139 Ho2s2
Dtc Description
DTC Description
The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage
capacity of the three way catalyst 1 causes the longer switching time. To judge
the malfunctions of heated oxy ...