416C, 426C, 428C, 436C and 438C Backhoe Loaders Transmission Electronic Control System Caterpillar

Troubleshooting Diagnostic Codes

Usage:

426C 1ER

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Table 1
Diagnostic Codes that are Detected by the Transmission Electronic Control Module
CID and FMI	Description
CID 168	Electrical System
FMI 00	Data valid but above normal operational range
FMI 01	Data valid but below normal operational range
CID 191	Speed Sensor (Transmission Output)
FMI 08	Abnormal frequency, pulse width, or period
CID 520	The configuration of the transmission
FMI 02	Data erratic, intermittent, or incorrect
CID 641	Solenoid Valve (Forward High)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 642	Solenoid Valve (Reverse)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 643	Solenoid Valve (Forward Low)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 644	Solenoid Valve (First and Second Gear)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 645	Solenoid Valve (Third Gear)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 646	Solenoid Valve (Fourth Gear)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit
CID 650	The Plug for the Harness Code
FMI 02	Data erratic, intermittent, or incorrect
CID 668	Transmission Control (Shift Lever)
FMI 02	Data erratic, intermittent, or incorrect
FMI 09	Abnormal update
CID 683	Relay (Parking Brake)
FMI 03	Voltage above normal or shorted high
FMI 05	Current below normal or open circuit
FMI 06	Current above normal or grounded circuit