855654T08 Mariner PUMP ASSEMBLY, Power Trim

Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
110-3 Engine Coolant Temperature Sensor voltage above normal     The Electronic Control Module (ECM) detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds.
The engine has been running for seven minutes.
An engine coolant temperature that is less than
−35 °C (−31 °F) will also activate this fault.     The code is logged.
A snapshot is triggered.
The value of the parameter is set to
90 °C (194 °F).    
110-4 Engine Coolant Temperature Sensor voltage below normal     The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds.
An engine coolant temperature that is greater than
140 °C (284 °F) will also activate this fault.     The code is logged.
A snapshot is triggered.
The value of the parameter is set to
90 °C (194 °F).    
172-3 Intake Manifold Air Temperature Sensor voltage above normal     The ECM detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds.
An intake manifold air temperature that is less than
−35 °C (−31 °F) will also activate this fault.     The code is logged.
A snapshot is triggered.
The value of the parameter is set to
70 °C (158 °F).    
172-4 Intake Manifold Air Temperature Sensor voltage below normal     The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds.
An intake manifold air temperature that is greater than
140 °C (284 °F) will also activate this fault.     The code is logged.
A snapshot is triggered.
The value of the parameter is set to
70 °C (158 °F).    
1836-3 Auxiliary Temperature Sensor voltage above normal     The ECM detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds.     The code is logged.
A snapshot is triggered.
The value of the parameter will be set to a default value.    
1836-4 Auxiliary Temperature Sensor voltage below normal     The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds.     The code is logged.
A snapshot is triggered.
The value of the parameter will be set to a default value.    System OperationUse this procedure to troubleshoot any suspect problems with the following sensors:
Engine coolant temperature sensor
Intake manifold air temperature sensor
Auxiliary temperature sensor (if equipped)
Fuel temperature sensor (if equipped)The sensor signal for the passive sensors is routed to terminal 1 of each sensor connector. The analog return for the passive sensors is routed from the ECM to terminal 2 of each sensor connector.
Illustration 1 g02499820
Schematic for the analog sensors
Illustration 2 g02499833
Locations of the analog sensors (typical left side engine view) (1) Intake manifold air temperature sensor (2) Fuel temperature sensor (if equipped) (3) J2/P2 ECM connectors (4) J1/P1 ECM connectors
Illustration 3 g02527561
(5) Engine coolant temperature sensor
Illustration 4 g01382997
Terminal locations at the P2 ECM connector for the analog sensors (P2-13) Engine coolant temperature (P2-30) Sensor return (P2-56) Intake manifold air temperature (P2-62) Fuel temperature (if equipped)
Illustration 5 g01382975
Terminal locations at the P1 ECM connector for the analog sensors (P1-3) Sensor return (P1-16) Auxiliary temperature (if equipped)
Illustration 6 g01241538
Terminal locations at the sensor connector for the analog sensors (Terminal 1) Sensor signal (Terminal 2) Sensor return
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Check for "Active" or "Logged" Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Restore power to the ECM.
Monitor the diagnostic codes on Cat ET. Check and record any diagnostic codes.Note: Wait at least 30 seconds in order for the diagnostic codes to become active.
Determine if the problem is active and related to one of the following diagnostic codes:
-3 Voltage above normal
-4 Voltage below normalExpected Result:No diagnostic codes are active at this time.Results:
OK - No diagnostic codes are active at this time.Repair: There may be an intermittent electrical problem. If an intermittent electrical problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect" for information that is related to troubleshooting intermittent electrical problems.STOP
Not OK - An active -3 diagnostic code is present. Proceed to Test Step 2.
Not OK - An active -4 diagnostic code is present. Proceed to Test Step 4.Test Step 2. Check for a Short Circuit to the +Battery at the Sensor Connector
Measure the voltage