Toyota Model 7HBW23 Service Manual
Section 5. Troubleshooting Symptom Tables: Lift/Lower System
Section 5. Troubleshooting
Symptom Tables: Lift/Lower System NOTE: If it is determined that a component failed as a result of hydraulic fluid contamination, replace the failed component and flush, fill, and bleed the hydraulic system. See “Hydraulic Fluid” on page 6-52.
NOTE: Reference electrical schematics beginning on Page A-9 and hydraulic schematic beginning on page A-12.
No Lift, Lift Motor Does Not Run, Travel is OK Possible Cause
Action
Bad lift pump contactor
With Master Control ON/OFF switch ON, the PIN-key code entered, the green ON (I) key on the keypad pressed and lift switch depressed, does main contactor (K10) and pump contactor (K30) energize (click)? If not, measure voltage between pump contactor coil terminals. If B+ voltage is present, replace the pump contactor.
Bad control handle card (A2)
With Master Control ON/OFF switch ON, the PIN-key code entered, the green ON (I) key on the keypad pressed and lift switch depressed, does pump contactor (K30) energize (click)? If not, check for lift signal input at CAN. (See “Service Display” on page 5-21.) If no signal is detected, replace control handle card (A2). NOTE: Check for mechanical problems in the handle head before replacing control handle card.
Bad wiring continuity or wiring shorts
With Master Control ON/OFF switch OFF and battery disconnected, check for continuity and wiring shorts in wiring harness or cables.
Bad lift-limit switch
With Master Control ON/OFF switch OFF, battery disconnected and forks lowered, check continuity through the lift-limit switch. Replace if necessary.
Bad lift pump motor brushes...
With Master Control ON/OFF switch ON, the PIN-key code entered, the green ON (I) key on the keypad pressed and the lift switch depressed, does pump contactor (K30) energize (click)? If YES, measure voltage between B– and lift pump motor terminal. If OK, check lift motor brushes...
...or bad lift pump motor...
...if brushes are OK, test the pump motor.
00700-CL340-05, Issued: 2 May 2005
5-35
