Section 5. TroubleshootingToyota Model 7HBW23 Service Manual

Symptom Tables: Lift/Lower System

Load Drifting/Settling

Possible Cause Action

Incorrect lift pressure adjustmentCheck and adjust lift pressure setting.

Contaminated or bad check valve

Check for contamination in hydraulic fluid. If contamination is present, flush, fill and bleed the hydraulic system. Clean the check valve.

If no contamination is found, replace check valve.

Leaking or contaminated lowering solenoid valve

Check for contamination in hydraulic fluid. If contamination is present, flush, fill and bleed the hydraulic system. Clean the solenoid valve.

If no contamination is found, replace the solenoid valve.

Load too large for lift truck capacityCheck load weight. Check lift pressure setting.

No Lift or Lower. No Fault Codes

Possible Cause Action

Throttle magnet-actuator arm (in control handle) out of adjustment

Check with service display and repair as needed.

Bad ETAC. If no other problems are noted but the ETAC does not detect the presence of the magnet, replace the ETAC.

Lift contactor missing, open or short circuit in lift circuit (contactor, wiring, motor), Bad power amplifier

Perform standard electrical troubleshooting procedures in the lift circuit.

Incorrect ETAC software installed. Note: this is only possible if ETAC was recently replaced.

Lowering may not occur if incorrect software was inadvertently installed (drive function will also not function correctly). Check for correct software part number and replace ETAC if not correct.