0232-04 5 Volt Supply Below Normal (21)

136

TM 9-2320-312-24-2

Troubleshooting Section

These effects are dependent on the operating

conditions that exist at the time when the code

occurs.

Troubleshooting:

Perform the following diagnostic procedure: "5 Volt

Engine Pressure Sensor Supply Circuit - Test"

Results:

OK STOP.

i01641176

i01745196

0232-04 5 Volt Supply Below

0246-11 Brake Switch #1

Normal (21)

SMCS Code: 1129-ZS

SMCS Code: 1408-081; 1900-038; 1901-038

Conditions Which Generate This Code:

The engine is running and both of the following

conditions exist:

The supply voltage for the pressure sensors of the

engine is below normal level.

The status of the service brake pedal position

switch 1 indicates that the brake pedal has been

System Response:

depressed.

Electronic System Response All pressure sensors

The status of the service brake pedal position

of the engine are set to default values. All diagnostic

switch 2 indicates that the pedal has been

codes for the pressure sensors of the engine are

released.

disabled while this diagnostic code is active.

System Response:

Service Tool Display or Lamps Caterpillar

Electronic Technician (ET) will display the default

Electronic System Response The diagnostic code

status of the sensors. This default status is indicated

is logged into memory only if the engine is running.

in the following list:

This diagnostic code will prevent cruise control,

PTO operation, or idle operation. The check engine

Boost pressure 0 kPa (0 psi)

lamp will not illuminate for this diagnostic code.

Engine Oil Pressure 600 kPa (87 psi)

Engine Response The engine will disengage or

the engine will not allow the setting of the cruise

Atmospheric Pressure 100 kPa (15 psi)

control, the PTO, or the idle speed.

Injection Actuation Pressure 17.5 kPa (2.50 psi)

Troubleshooting:

Injection Actuation Driver Current 40%

Perform the following diagnostic procedure: "Service

Brake Pedal Position (Switch 1) Circuit -Test"

ET will display "DIAG" next to the status of the

sensor in order to indicate that the sensor is

Results:

operating at the value that is shown due to an active

diagnostic code.

OK STOP.

Engine Response An active diagnostic code may

not cause any noticeable effect on engine response.

However, the active diagnostic code may cause the

engine to have the following effects:

Run rough.

Low power