What Is a Test Point

A test point is a designated electrical pad or via on a device's printed circuit board (PCB) that provides direct access to critical bus lines — most commonly the UFS/eMMC storage interface. On the Huawei P30 Pro VOG-L09, shorting or probing specific test points allows external tools to communicate with the storage chip and the Kirin 980 SoC at a hardware level, bypassing the locked bootloader and normal software security layers. This technique is essential when conventional software-based methods are unavailable or have failed, and it forms the backbone of low-level repair workflows used by professional mobile technicians worldwide.

When Technicians Need This

Test point access on the VOG-L09 is typically required in the following scenarios:

  • FRP (Factory Reset Protection) bypass: When the device is locked to a Google account after a hard reset and the owner cannot provide credentials.
  • Dead boot recovery: When a failed OTA update, interrupted flash, or corrupt bootloader leaves the device completely unresponsive — no display, no USB enumeration.
  • IMEI repair: After a botched firmware operation that has wiped or corrupted the EFS/modem partition.
  • Firmware flashing: When the device cannot enter fastboot or download mode through standard button combinations.
  • Read/backup operations: Creating a full UFS dump before performing invasive repairs.

Locating the Test Points

On the Huawei P30 Pro VOG-L09, the ISP test points are located on the main motherboard, near the UFS storage IC. After removing the rear glass panel and disconnecting the battery, the motherboard can be separated from the chassis. The relevant test pads are found on the underside (component side B) of the PCB, clustered in the lower-central area close to the UFS chip package. Key ISP lines include CLK, CMD, DAT0, VCC (2.9 V), VCCQ (1.8 V), and GND. A reset (RST) pad may also be present depending on the board revision. Note that exact pad coordinates vary between board revisions and should be confirmed with a high-resolution board schematic before probing.

Step-by-Step Access Procedure

Follow this procedure carefully:

  • Power off the device completely and remove the SIM tray.
  • Apply controlled heat (~80 °C) to the rear glass and use a suction cup and thin pry tool to lift it without cracking the display assembly.
  • Remove the wireless charging coil and disconnect the battery flex connector immediately.
  • Unscrew and lift the motherboard shield, then detach all flex cables connected to the board.
  • Identify the UFS ISP pads using a verified schematic or known-good board diagram.
  • Connect your ISP adapter or manually solder fine wires to CLK, CMD, DAT0, VCC, VCCQ, and GND pads.
  • Connect the adapter to your tool (e.g., EasyJTAG Plus or UMT), launch the software, select Huawei VOG-L09 / Kirin 980, and execute the desired operation (FRP erase, firmware write, or read).
  • After completion, reassemble in reverse order and test the device.

Safety Tips and Warnings

Incorrect voltage or miswired connections can permanently destroy the UFS chip or SoC. Always verify VCC (2.9 V) and VCCQ (1.8 V) levels with a multimeter before powering the ISP adapter. Never connect the battery while ISP wires are attached. Use flux and fine-gauge wire (30 AWG or thinner) to avoid pad lift. Ensure ESD precautions — use an anti-static mat and wrist strap throughout. Do not attempt this procedure without a confirmed, board-specific schematic, as pad locations differ between hardware revisions of the VOG-L09.

Pin / Test Point Reference

PinDescription
CLKUFS clock line to storage IC — Confirm pad location via schematic before probing
CMDUFS command line — Confirm pad location via schematic before probing
DAT0UFS data line 0 — Confirm pad location via schematic before probing
VCCUFS core power supply — nominally 2.9 V
VCCQUFS I/O power supply — nominally 1.8 V
GNDGround reference pad
RSTUFS reset line (board-revision dependent) — May not be present on all VOG-L09 board revisions

Tools required: EasyJTAG Plus, UMT (Ultimate Multi Tool), Medusa Pro II, ISP eMMC/UFS adapter, Hot air rework station, Precision soldering iron, 30 AWG wire, Multimeter, Anti-static mat and wrist strap, Suction cup and pry tool set

Supported operations: FRP Erase, Dead Boot Repair, Read Firmware / UFS Dump, Write Firmware, IMEI Repair, Bootloader Unlock (hardware-level)

âš  Safety note: Use correct voltages only: VCC 2.9 V, VCCQ 1.8 V. Disconnect battery before ISP connection. Wrong wiring will permanently damage UFS or Kirin 980 SoC.