Isuzu N-Series. Service manual — part 444
6E-112 EMISSION AND ELECTRICAL DIAGNOSIS
DTC-P52 Electronically Erasable Programmable Read Only Memory (EEPROM) Error
DTC-P61 Barometric Pressure Sensor Circuit Error
Step
Action
Value
YES
NO
1
Was the “on-board diagnostic (OBD) system
check” performed?
—
Go to self diag
system check
2
Replace the ECM.
Is the action complete?
—
—
3
1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”
Is DTC 52 all right under Scan Tool Check?
—
4
Is any current trouble other than DTC 52 dis-
played by scan tool?
—
Go to trouble code
section
Trouble code clear
Step
Action
Value
YES
NO
1
Was the “on-board diagnostic (OBD) system
check” performed?
—
Go to self diag
system check
2
Replace the ECM.
Is the action complete?
—
—
3
1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”
Is DTC 61 all right under Scan Tool Check?
—
4
Is any current trouble other than DTC 61 dis-
played by scan tool?
—
Go to trouble code
section
Trouble code clear
EMISSION AND ELECTRICAL DIAGNOSIS 6E-113
WITHOUT DIAGNOSIS TROUBLE CODE
Introduction
If there occurs a malfunction although no Diagnostic Trouble Code (DTC) is generated, then inspect and repair the
system in accordance with the flowcharts given on the following pages.
When a Diagnostic Trouble Code (DTC) is produced, inspect and repair system with reference to “EMISSION AND
ELECTRICAL DIAGNOSIS”.
6E-114 EMISSION AND ELECTRICAL DIAGNOSIS
Engine Hunting
N6A1233E
EMISSION AND ELECTRICAL DIAGNOSIS 6E-115
Startup Failure
N6A1234E
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