Series 40E Troubleshooting – Section 35.1 System Function – Idle Shutdown Timer

The Idle Shutdown feature is an optional feature that allows the ECM to shut off the engine if an idle condition has been detected for more than a customer specified programmed period (2 to 120 minutes). Prior to engine shutdown, the Oil/Water Lamp (red) will flash for 30 seconds to warn the driver of the pending shutdown. The idle time is measured from the last clutch or break pedal transition. The engine must be out of gear for the idle shutdown timer to be initiated. This feature can be programmed to only operate at specific ambient air temperatures to allow prolonged engine operation in cold or hot weather operation. For PTO applications, this feature can also be programmed not to be turned on under specific load levels, or when the PTO switches are on. For the Idle Shutdown Timer function diagram, see Figure
“Idle Shutdown Timer Function Diagram”

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Figure 1. Idle Shutdown Timer Function Diagram

Section 35.1.1
Fault Detection / Management

The Idle Shutdown feature is internal to the ECM. All subsystems that input the idle shutdown strategy have their own fault detection and management strategy, e.g. IAT temperature sensor circuit. A fault code will be set if the idle shutdown timer has been activated, but this is not a system fault. Its only purpose is to indicate to the technician, driver or owner that the idle shutdown timer has been activated and the engine has been shut down.‪

For Idle Shutdown Timer (IST), see Figure
“Idle Shutdown Timer “

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Figure 2. Idle Shutdown Timer

Note: This fault code does not indicate any system or circuit faults. No diagnostics are necessary. If the IST programming parameters need to be changed, follow the extended description.

Fault Code 324 = Idle Shutdown time has been exceeded and the engine has been shut down.‪

Section 35.1.2
Extended Description

The following list of parameters are those essential to setting the IST function to meet the customer’s needs and expectations. They are accessible by using the EST (Electronic Service Tool).‪

Section 35.1.3
Engine Idle Shutdown Control Parameters

This group of parameters customizes the prolonged engine idle automatic shutdown feature. The purpose of this feature is to shut the engine down after a programmable period of idle time has been exceeded. This allows fuel conservation, a reduction of engine wear and emissions. Thirty seconds before an automatic engine shutdown, the operator will be warned via the red Oil / Water Lamp. This lamp will begin flashing until the engine is shut down. The operator may override the electronics at any time. After an engine shutdown occurs, the Oil / Water Lamp will stop flashing and a diagnostic code (324) will be recorded. The diagnostic code is recorded to assist in diagnosing possible service complaints of the engine shutting down.‪

Currently there are four states of electronic operation:‪

• OFF
• PTO available
• No engine load
• Tamper proof

Section 35.1.3.1
Idle Shutdown Timer

This parameter indicates to the on-board electronics if this vehicle has the Idle Shutdown timer feature.‪

OFF: Feature is turned OFF at all times.‪

PTO Available: Feature allows prolonged engine idle shutdown only when the engine is in the low idle, no load condition and PTO operation is OFF.‪

No Engine Load: Feature allows prolonged engine idle shutdown when the engine is in the low idle, no load condition.‪

Tamper Proof: Feature is tamper proof from operator override.‪

Section 35.1.3.2
Idle Shutdown Time

This parameter indicates the length of engine idle time before the engine may be shut down.‪

Section 35.1.3.3
Max IAT for Idle Shutdown

This parameter indicates the maximum ambient air temperature that the on-board electronics may shut down a prolonged idling engine. This temperature is used to circumvent the shutting down of an engine when it is running because the air conditioning may be turned on.‪

Section 35.1.3.4
MIN IAT for Idle Shutdown

This parameter indicates the minimum ambient air temperature that the on-board electronics may shut down a prolonged idling engine. This temperature is used to circumvent the shutting down of an engine when it is running because of cold ambient temperature.‪

Section 35.1.4
Flash Code 324

ATA Code PID 71 FMI 14‪

Idle Shutdown Timer enabled engine shutdown.‪

This flash code is set when the engine has been shut off by the ECM because the idle time criteria has been exceeded. The idle shutdown feature must be turned on for this fault code to display. This fault code can be cleared with the EST. ‪