Yale accelerator pedal assembly
Part: 6502363
Pedal assembly number cited for recurring code 12 accelerator sensor faults.
$130-$170
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Yale Forklift Error Codes
Yale forklifts (GP series LP/diesel, ERC-G series electric, and Veracitor series) use the EV100 display on newer models and diagnostic LED flash codes on older units. Yale and Hyster share many components — their powertrain systems are from the same parent (Hyster-Yale Group) but the code numbering differs.
Yale Powertrain and Engine Codes (1-10)
| Code | Fault | Common Cause | Action |
|---|---|---|---|
| 1 | ECM internal | Engine control module fault | Cycle key, replace ECM if persists |
| 2 | Crankshaft position | No crank signal | Test CPS resistance, wiring (PSG engines) |
| 3 | Camshaft position | No cam signal (GM engines) | Test cam sensor, wiring |
| 4 | Fuel injector circuit | Injector driver open/short | Test injector resistance 0.5-2 ohms |
| 5 | Engine overheat | Coolant temp > limit | Check coolant, radiator, fan |
| 6 | Low oil pressure | Oil below 10 PSI | Check oil level, pressure sender |
| 7 | Alternator fault | Charging voltage | Test alternator output |
| 8 | Throttle actuator | Electronic throttle fault | Test actuator motor |
| 9 | Glow plug (diesel) | Glow plug or relay | Test plug resistance |
| 10 | Fuel pump | Pump circuit open | Test pump relay, voltage |
Yale Sensor and EV100 Codes (11-20)
| Code | Fault | Common Cause | Action |
|---|---|---|---|
| 11 | Accelerator pedal low | Sensor signal below 0.5V | Check 5V reference, sensor ground |
| 12 | Accelerator pedal high | Sensor signal above 4.5V | Check wiring for short to battery |
| 13 | Brake switch | Switch stuck closed/open | Test brake switch continuity |
| 14 | Seat switch | Operator presence not detected | Check seat switch, wiring |
| 15 | Directional lever | FNR switch position invalid | Test lever sensor, wiring |
| 16 | Parking brake | Brake not set/not released | Check parking brake switch |
Yale Electric Truck Codes (ERC-G Series)
| Code | Fault | Common Cause | Action |
|---|---|---|---|
| 21 | Traction motor overtemp | Drive motor too hot | Let cool 30 min, check vent |
| 22 | Traction motor current limit | Motor or wiring short | Check motor, brushes, wiring |
| 23 | Pump motor overtemp | Hydraulic motor too hot | Let cool, reduce lift cycles |
| 24 | Pump motor current limit | Pump motor or wire fault | Check pump motor resistance |
| 25 | Battery voltage low | Battery discharged | Charge to 100% |
| 26 | Controller overtemp | Traction controller hot | Check cooling fan, clean heatsink |
| 31 | CAN bus communication | Network wiring fault | Check CAN harness, 120 ohm terminator |
| 32 | Display comm lost | EV100 not communicating | Check display connector, replace |
Most Common Yale Forklift Faults
Code 12 — Accelerator Pedal High
The most frequent code on Yale GP series forklifts with GM and PSG engines. The electronic throttle pedal sensor signal is stuck high. This is almost always water or corrosion in the pedal connector. Yale uses a 3-wire hall-effect sensor (5V reference, signal, ground). Water gets into the connector and creates a bridge between 5V reference and signal wires.
Fix: Unplug the connector, blow it dry, apply dielectric grease, and reseat. If the code was intermittent and hasn’t returned, the drying fixed it. If it returns after the next rain or washdown, replace the pedal assembly (Yale part number 6502363, same as Hyster compatibles).
Code 6 — Low Oil Pressure
On Yale LP/diesel forklifts with GM Vortec engines, low oil pressure is usually the sender failing before the actual oil pressure drops. The GM senders (AC Delco P/N D1340C) are known for intermittent failure between 4,000-6,000 hours. Test: install a manual oil pressure gauge in place of the sender. If pressure is above 15 PSI at idle, the sender is failed. Replace the sender — it’s about $25.
Code 31 — CAN Bus Communication
The CAN bus on Yale forklifts connects the ECM, EV100 display, transmission controller (if equipped), and hydraulic controller. A fault on any one of these nodes can bring down the whole network. Quick test: disconnect the CAN connectors at each node one at a time with the key on. If the code clears when you disconnect a specific node, that node has failed and is shorting the bus. The transmission controller is the most common CAN bus fault source on Yale forklifts.
Parts Reference
| Part | Notes | Cost |
|---|---|---|
| Accelerator pedal assy | Yale 6502363 (Hyster compatible) | $130-$170 |
| Oil pressure sender | AC Delco D1340C | $20-$30 |
| EV100 display | Yale 6558027 | $400-$700 |
| Crankshaft sensor (GM) | Yale 6573024 | $40-$70 |
| Traction controller (electric) | Per model | $800-$1,500 |
| CAN harness (main) | Per model | $100-$200 |
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