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Caution for diode check method ............................................................................................................... 62-81
Surge voltage and surge suppression diodes ........................................................................................... 62-83
Diagnostic System .......................................................................................................................................... 62-84
Transmission controller ............................................................................................................................. 62-84
Monitor controller ...................................................................................................................................... 62-88
Diagnostic failure history indication and deletion ...................................................................................... 62-91
Diagnostic switch ...................................................................................................................................... 62-93
MODM (S/N 0154~) ........................................................................................................................................ 62-94
MODM function ......................................................................................................................................... 62-94
Monitor Changeover .................................................................................................................................. 62-94
MODM: input/output monitor - input/output signal correspondence table ............................................... 62-101
Check & Adjustment Electrical Group ................................................................................................................... 63-1
Cautions Regarding Electric Circuit Check ....................................................................................................... 63-2
Disconnecting or reinstalling connector ...................................................................................................... 63-2
How to attach the probes of the circuit tester .............................................................................................. 63-4
Electrical Transmission Control System Troubleshooting Flowchart ................................................................. 63-5
Standard troubleshooting flowchart ............................................................................................................. 63-5
Transmission Controller Abnormal Operation Judgment .................................................................................. 63-6
Transmission controller check ..................................................................................................................... 63-6
Transmission controller LED indicator ........................................................................................................ 63-8
Electrical Circuit Check ................................................................................................................................... 63-10
Shift lever input electrical circuit check ..................................................................................................... 63-10
Inching (Declutch) input electrical circuit check ........................................................................................ 63-12
QUAD switch input electrical circuit check ................................................................................................ 63-14
Machine speed sensor input electrical circuit check ................................................................................. 63-15
Clutch solenoid valve output electrical circuit check ................................................................................. 63-16
Modulator valve output electrical circuit check .......................................................................................... 63-18
Neutral relay electrical circuit check .......................................................................................................... 63-20
Parking brake electrical circuit check ........................................................................................................ 63-21
Auto brake electrical circuit check ............................................................................................................. 63-23
Gauge circuit electrical circuit check ......................................................................................................... 63-25
Fuel level gauge electrical circuit check .................................................................................................... 63-27
Bucket positioner electrical circuit check ................................................................................................... 63-29
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