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CONTROL UNITS — HC-PSG5

HC-PSG5 — OEM-equivalent replacement ECU for Bosch VP30 and VP44 pumps

Built for workshops and diesel distributors — consistent availability, predictable results, bench-ready installation.
Brand-new unit · Drop-in, no proprietary software · 3-year warranty · Bench-tested
Request distributor pricingSee bench test video

Why PSG5 repairs fail today

→Manipulated units dominate failures
→Untouched units are disappearing from the market
→Searching for donor units wastes labor hours and kills delivery times
→The problem is not repair skill — it’s uncertainty, availability, and time
Illustrative distribution — based on Herlic field experience, not a statistical sample.
→Mid-process uncertainty forces re-quoting
→Each delay and re-quotation reduces perceived professionalism
→Labor accumulates before a solution is clear, often wasted
→Warranty returns diminish margins and lessens trust

The OEM-equivalent replacement

Re-developed with 21st century electronics
Dynamic Operation Adjustment
815 Bench Compatibility
DTC Diagnostic Compatibility
ISO K-LINE Comm. Protocol
CAN-BUS Comm. Protocol
Sensors Self-Test
References available

Proven capabilities

✓ DTC Diagnostic Compatibility ✓ CAN-BUS Comm. Protocol ✓ Sensors Self-Test ✓ Dynamic Operation Adjustment ✓ ISO K-LINE Comm. Protocol ✓ Bosch 815 bench support

In development

→ Additional references — catalogue expanding monthly → Extended Bosch 815 bench coverage

ALREADY WORKING WITH

It is a direct replacement electronic control unit for Bosch VP30 and VP44 diesel injection pumps.
It replaces the original PSG5 pump ECU that commonly fails due to heat, vibration and aging.

It keeps the original hydraulic pump, injectors, timing mechanism and engine ECU intact.

The original VP pump ECU is famous for:

  • No start
  • Engine cutting out when hot
  • Fault codes (P1564, P1565, P1631, etc.)
  • Intermittent limp mode
  • Immobilizer lockouts
  • Burnt MOSFET drivers

HC-PSG5 replaces the entire electronics, eliminating these failure modes.

As defined by european standards, there is a 3 year product warranty.

No.
As long as the mechanical pump is healthy, HC-PSG5 installs without opening the pump body.

If the pump has low pressure, worn head or damaged timing piston, those must be repaired separately.

Yes.
HC-PSG5 is 100% compatible with any OEM and Aftermarket VP30/VP44 ECU.

Yes.
HC-PSG5 supports:

  • OEM Ford and Audi immobilizer handshake
  • Cloning from original pump
  • Virgin mode for pairing to a new ECU
  • Immobilizer-off for motorsport or engine swaps

Yes.
HC-PSG5 is fully compatible with Bosch 815 and equivalent benches.

It supports:

  • Speed control
  • Quantity control
  • Timing control
  • Diagnostic communication

Yes. HC-PSG5 answers the EPS 815 compensation procedure exactly as a genuine unit does, so the pump can be compensated on the bench in the normal way.

Bench testing confirms:

  • Pump health
  • Valve response
  • Delivery consistency

Idle and injection-start-angle adjustment and recoding run over the standard K-Line protocol, as on a genuine unit.

Yes.
HC-PSG5 uses:

  • OEM pump connector
  • OEM ECU communication
  • OEM sensors

No wiring modifications nor initial programming in 815 bench are required.

Put an HC-PSG5 on your bench.

Request distributor pricing and lead times, or find your nearest distributor.