1. Home
  2. Docs
  3. Performance Memcals
  4. Setting Base Timing
  5. A. Diagnostic Mode

A. Diagnostic Mode

V6 ENGINES

V6 engines have no timing to set.

VN / VP V8

To set base timing or check codes on VN – VP V8 link pins in ALDL connector (white square plug on wiring loom
approximately 15cm from ECU on main engine harness). At one end of the ALDL connector please link 2 wires above and below one another, with suitable tool.

The wire colours are:
Black with white trace wire and white with black trace wire. ChipTorque recommend a very
fine metal paperclip or split pin as the best tool to use to link the pins/wires. If the link is correct, with the engine
running the check engine light will now flash on and off about once per second.

VR / VS / VT V8

To set base timing or check codes on VR or VS or VT V8 – Link pin 5 (black with white trace wire or straight black
wire) and pin 6 (white with black trace wire) on the 16pin OBD diagnostic plug under the steering wheel at the bottom of the trim panel. ChipTorque recommend a very fine metal paperclip or split pin as the best tool to use to link the pins/wires. If the link is correct, with the engine running the check engine light will now flash on and off about once per second.

No Diagnostic Plug:
If the engine is transplanted and the OBD / ALDL plug is not available, connect the Diagnostic request wire (white
with black trace wire) to ground. Diagnostic Request wire:
VN-VP All ECU pin A9
VR-VS Manual ECU pin A9
VR-VS Auto PCM pin D6
VSIII or VT V8 PCM pin F14