Intermittent Engine Shutdown

TM 9-2320-312-24-2

Troubleshooting Section

ECM Connections

4. If the "Idle Shutdown Time" or the "PTO

Shutdown Time" is programmed above 0, use ET

to look for the following diagnostic codes:

A problem with the battery power, the ground to the

ECM or the vehicle wiring can cause erratic engine

71-01 Idle Shutdown Occurrence (47)

rpm or other more severe problems. If this is a

suspected cause, refer to Troubleshooting, "Ignition

71-14 PTO Shutdown Occurrence (47)

Key Switch Circuit and Battery Supply Circuit Test".

Battery Power or Ground to the

i01653176

ECM

Intermittent Engine Shutdown

1. Ensure that the following connectors have been

SMCS Code: 7569

installed correctly:

Probable Causes

ECM connectors (J1/P1 and J2/P2)

The probable root causes are listed in order below:

Injector connector (J300/P300)

Idle Shutdown and Engine Monitoring

Camshaft position sensor connector

(J401/P401 and J402/P402)

Battery power or ground to the ECM

2. Use ET to check for diagnostic code 168-02

Aftermarket engine protection devices

(Intermittent Battery Power to the ECM).

Check the power connections for the ECM

Fuel supply

and the ground connections for the ECM. If a

problem is suspected, wire a bypass. Refer to

Engine speed/timing sensors

Troubleshooting, "Ignition Key Switch Circuit and

Battery Supply Circuit - Test".

Low injection actuation pressure

3. If the problem occurs only after engine warm-up

ECM or Personality Module

and the problem disappears after the engine

cooldown, the circuit breakers may be tripping

Note: Shut down the engine before attempting to

because of the heat. Check the circuit breakers

troubleshoot the problem.

on the vehicle in order to determine if the circuit

breakers reset automatically.

Recommended Actions

Aftermarket Engine Protection

Perform the following diagnostic procedures in

Devices

order:

1. Check aftermarket engine protection devices.

Idle Shutdown and Engine

These devices usually interrupt power to the

ECM and the ECM will not communicate with ET.

Monitoring

2. Check for the correct installation of the

1. Check the parameters for "Engine Monitoring"

aftermarket engine protection device.

and "Idle Shutdown".

3. Check for the correct operation of the aftermarket

2. Connect Caterpillar Electronic Technician (ET) to

engine protection device.

the cab data link connector. Read the following

customer parameters:

4. Verify that the ECM is receiving battery voltage.

"Engine Monitoring"

Fuel Supply

"Idle Shutdown Time"

1. Monitor the exhaust for smoke while the engine

3. If "Engine Monitoring" is programmed to

is being cranked.

shutdown, use ET to look for the following

diagnostic codes:

If no smoke is present, there may be a problem

with the fuel quality or there may be a problem

110-11 Very High Coolant Temperature (61)

with the fuel supply.

111-11 Very Low Coolant Level (62)