Xtool A80 - Volvo Self-Diagnostic System; Volvo Diagnostic Interface and Seats; Block A Diagnostic Connections

A80 BT Intelligent Diagnosis System
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clear the fault code. If there is no DRBII, the ignition switch can be
turned ON/OFF 50 times and the fault code is cleared.
Volvo Car Fault Self-Diagnostic System
The interface of the Volvo series of self-diagnostic system is in the
right front corner of the car body, the engine cover is opened, and the
front left headlights have two diagnostic seats A and B. The A seat has a
diagnostic jumper, an LED light and a button. There are six diagnostic
jacks in each of the two diagnostic seats A and B, each connected to a
different diagnostic system.
Block A:
Hole 1 → Transmission
Hole 2 → Fuel System