RING-SEAL 7G9224 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the coolant temperature sensor or if either of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Code and Description Conditions which Generate this Code System Response
110-3 Engine Coolant Temperature Sensor : Voltage Above Normal The engine's Electronic Control Module (ECM) detects signal voltage that is more than 4.9 VDC for eight seconds. The ECM has been powered for at least two seconds. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
The value of the parameter is set to the last value from the sensor that is valid.
110-4 Engine Coolant Temperature Sensor : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for eight seconds. The ECM has been powered for at least two seconds. System OperationUse this procedure to troubleshoot any suspect problems with the engine's coolant temperature sensor.The sensor signal for the passive sensor is routed from the ECM to terminal 1 of the sensor connector. The sensor return for the passive sensors is routed from the ECM to terminal 2 of the sensor connector.
Illustration 1 g01771633
Schematic for the passive analog sensor
Illustration 2 g01771693
Locations of the passive analog sensor (left front side engine view)
(1) Engine coolant temperature sensor
Illustration 3 g01771694
Locations of the connectors at the ECM junction box (left front engine view)
(2) J1/P1 ECM connectors
(3) Control harness connectors
Illustration 4 g01420865
Terminal locations at the P1 ECM connector for the passive sensor
(P1-3) Analog return
(P1-27) Engine coolant temperature