Isuzu N-Series. 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 Step 2

Go to self diag 

system check

2

Replace the ECM.

Is the action complete?

—

Go to Step 3

—

3

1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”

Is DTC 52 all right under Scan Tool Check?

—

Go to Step 4

Go to Step 2

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 Step 2

Go to self diag 

system check

2

Replace the ECM.

Is the action complete?

—

Go to Step 3

—

3

1. Reconnect all the connectors removed.
2. Ignition “ON”, Engine “OFF”

Is DTC 61 all right under Scan Tool Check?

—

Go to Step 4

Go to Step 2

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