C4.4 and C6.6 Engines for Caterpillar Built Machines E539 High Intake Manifold Air Temperature Caterpillar

Conditions Which Generate This Code:

The Electronic Control Module (ECM) detects a fault with the intake manifold air temperature. The ECM detects the following faults:

• The engine has been running for more than 3 minutes.

• The temperature of the coolant is more than 99 °C (210 °F) and the intake manifold pressure is more than 30 kPa (4.35 psi).

• The trip point for the intake manifold air temperature is reached. Refer to Table 1.

• Diagnostic code 0172-03 Intake Manifold Air Temperature voltage above normal is not active.

• Diagnostic code 0172-04 Intake Manifold Air Temperature voltage below normal is not active.

System Response:

The event code will be logged.

A warning will appear on the display on the control panel.

Possible Performance Effect:

E539-1

None

E539-2

The ECM will derate the power. The power will be derated at one percent per second.

Troubleshooting:

Test Step 1.

Refer to Troubleshooting, "Intake Air Temperature Is Too High".

Results:

• OK - STOP