PLUNGER 6E0769 - Caterpillar

Table 2
Troubleshooting Test Steps Values Results
1. Check For Active Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic connector.
C. Turn the keyswitch to the ON position. Download the "Product Summary Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
D. Use the electronic service tool to check that coolant temperature, intake manifold air temperature, and NRS temperature are all at least 5° C (41° F).
Note: Wait at least 10 seconds in order for the diagnostic codes to become active.
E. Use the electronic service tool in order to monitor active diagnostic codes or recently logged diagnostic codes. Look for an active or logged -3 or -4 codes for the pressure sensor or the barometric pressure sensor.
F. Use the electronic service tool in order to monitor active diagnostic codes or recently logged diagnostic codes. Look for an active or logged -13 code for a pressure sensor or the barometric pressure sensor.
G. Turn the keyswitch to the OFF position.
Diagnostic codes
Result: There are no active diagnostic codes for the pressure sensors.
Repair: If there are logged diagnostic codes for the intake manifold pressure sensor, the fault may be intermittent.
Refer to Troubleshooting, "Electrical Connectors - Inspect" in order to identify intermittent faults.
Result: One or more of the temperature sensors is reading less than 5° C (41° F).
Proceed to Test Step 2.
Result: There is an active -3 or -4 diagnostic code for a pressure sensor or the barometric pressure sensor.
Repair: Troubleshoot these codes before continuing with this procedure.
Result: 3358-13 (3385-13) and 3563-13 (1785-13) diagnostic codes are active.
Proceed to Test Step 3.
Result: There is an active -13 diagnostic code for only one sensor.
Proceed to Test Step 4.
2. Ensure that the Systems are Fully Thawed
A. Move the machine into an environment where the ambient temperature is greater than 5° C (41° F) for the duration of any troubleshooting.
B. If engine has been operated or stored in cold ambient conditions where there is a risk of ice formation on a sensor or sensor pipes, run engine until the coolant temperature exceeds 65° C (149° F) for 20 minutes.
C. Turn the keyswitch to the OFF position. Wait for at least 20 seconds. The electronic service tool will disconnect.
D. Turn the keyswitch to the ON position.
E. Verify that coolant temperature, intake manifold air temperature, and NRS temperature are all now at least 5° C (41° F).
F. Check for active -13 diagnostic codes.
G. Check that the suspect sensor is installed correctly. Check that the suspect sensor is fully seated into the engine.
Diagnostic codes
Result: There are no active -13 codes.
Repair: The fault was caused by ice in the system that has now been thawed. Return the unit to service
Result: Both 3358-13 (3385-13)and 3563-13 (1785-13) codes are active or logged.
Proceed to Test Step 3.
Result: A single -13 code is active or logged.
Proceed to Test Step 4.
3. Check the Barometric Pressure Sensor
A. Turn the keyswitch to the OFF position.
B. Install a new barometric pressure sensor.
C. Turn the keyswitch to the ON position.