Troubleshooting with a Diagnostic Code

TM 9-2320-312-24-2

Troubleshooting Section

Troubleshooting with a

If the cause of the diagnostic code is a short circuit

or an open circuit in the injector common line, a

Diagnostic Code

fault will be active for both cylinders because of the

shared common wiring for the injectors.

System Response:

i01501859

No Diagnostic Code Detected

Electronic System Response The ECM will

(55)

illuminate the Check Engine Lamp while the fault is

active. The ECM will log the diagnostic code.

SMCS Code: 1000; 1900

Service Tool Display or Lamps Caterpillar

Electronic Technician (ET) will indicate a low reading

Conditions Which Generate This Code:

for an injector that has this fault in comparison to

other injectors when the Cylinder Cutout Test is

A Flash Code 55 indicates that the system has not

performed.

detected any system faults since the last powerup.

Engine Response The injector may not operate

System Response:

while the conditions exist. If the problem is in the

common return line, neither injector will operate.

This code will not appear on a service tool. The

check engine lamp is used to display the flash

Troubleshooting:

code. For more information on flash codes, refer

to Troubleshooting, "Check Engine Lamp Circuit -

Perform the following diagnostic procedure:

Test".

"Injector Solenoid Circuit - Test"

Troubleshooting:

Results:

There are no problems that require troubleshooting.

OK STOP.

Results:

i01638568

OK STOP.

0002-11 Cylinder 2 Fault (72)

i01638559

SMCS Code: 1290-038

0001-11 Cylinder 1 Fault (72)

Conditions Which Generate This Code:

SMCS Code: 1290-038

The ECM detects one of the following items after

attempting to operate the injector:

Conditions Which Generate This Code:

An open circuit exists in the wiring for the No. 2

The ECM detects one of the following items after

cylinder injector solenoid.

attempting to operate the injector:

An internal open circuit exists in the No. 2 cylinder

An open circuit exists in the wiring for the No. 1

injector solenoid.

cylinder injector solenoid.

A short circuit to ground on the injector solenoid

An internal open circuit exists in the No. 1 cylinder

for the No. 2 cylinder exists. The circuit is

injector solenoid.

grounded to the engine.

A short circuit to ground on the injector solenoid

A short circuit in the injector solenoid for the No.

for the No. 1 cylinder exists. The circuit is

2 cylinder exists.

grounded to the engine.

A short circuit in the injector solenoid to battery

A short circuit in the injector solenoid for the No.

voltage for the No. 2 cylinder exists.

1 cylinder exists.

If the cause of the diagnostic code is a short circuit

A short circuit in the injector solenoid to battery

or an open circuit in the injector common line, a

voltage for the No. 1 cylinder exists.

fault will be active for both cylinders because of the

shared common wiring for the injectors.