
SECTION 0C – TECH 2
CAUTION:
This vehicle will be equipped with a Supplemental Restraint System (SRS). A SRS will consist of either
seat belt pre-tensioners and a driver's air bag, seat belt pre-tensioners and a driver's and front
passenger's air bag s or seat belt pre- tensio ners, d riv er’s and fron t p asseng er’s air bag and lef t and rig ht
hand side air bags. Refer to SAFETY PRECAUTIONS, Section 12M Supplemental Restraint System of
this Service Information CD before performing any service operation on, or around any SRS
components, the steering mechanism or wiring. Failure to follow the SAFETY PRECAUTIONS could
result in SRS deployment, resulting in possible personal injury or unnecessary SRS system repairs.
CAUTION:
Whenever any component that forms part of the ABS or ABS/ETC (if fitted), is disturbed during Service
Operations, it is vital that the complete ABS or ABS/ETC system is checked, using the procedure as
detailed in 4 DIAGNOSIS, ABS or ABS/ETC FUNCT ION CHECK, in Section 12L ABS & ABS/ETC, in either
(V6) or (GEN III V8) of this Service Information CD.
1. GENERAL INFORMATION
The TECH 2 is a hand-held diagnostic computer designed specifically to help you diagnose and repair electronic
systems used on Holden vehicles.
When the TECH 2 is attached to a vehicle it can be a very versatile tool. W ith its large, easy-to-read display, the
TECH 2 guides you step-by-step through the testing procedur es. You respond to the TECH 2 through the k eyboard
commanding it to:
• Conduct the test you want to run
• Retrieve the diagnostic data you want
• Control the function you want to monitor
• Program or reprogram a Powertrain Control Module (PCM)
The T ECH 2 gets its power f rom the vehicle to be tes ted and c omm unic ates or inter f ac es with the vehic le elec tronic
systems through the Data Link Connector (DLC), attached to the instrument panel lower right hand trim, to the lef t
of the steering colum n. T ECH 2 can c om m unicate with the following control m odules , if the vehic le is equipped with
these systems.
• Body Control Module (BCM).
• Powertrain Control Module (PCM).
• Powertrain Interface Module (PIM)
• Instrument (INS).
• Supplemental Restraint System (SRS) Sensing and Diagnostic Module (SDM).
• Antilock Braking System / Electronic Traction Control System (ABS/ETC) Control Module.
When connected to the DLC, the TECH 2 can read Diagnostic Trouble Codes (DTC) and diagnostic data.
Depending on the application selected, TECH 2 can also control some systems for troubleshooting or automatic
testing. TECH 2 is also capable of programming Control Modules in conjunction with the Technical Information
System (TIS).
On VT Series II Models equipped with a GEN III engine the PCM does not contain a rem ovable PROM, it uses an
EEPROM (Flash Memory) which is non removable. The PCM is programmed from the factory with the proper
calibrations for vehicle operation. In the event that the PCM is replaced, or an updated calibration is required to
correc t a vehicle's operating c ondition, the PCM will have to be program m ed with the new calibration. Program m ing
is accomplished through the vehicle DLC using the TECH 2 Service Programming System (SPS) and the TIS.
A service replacement PCM EEPROM (Flash Memory) will not be programmed. DTC P0601 and P0602 indicates
the Flash Memory is not programmed or has malfunctioned.
This section of the Service information CD details only the Service Programming System, for all other TECH 2
information refer to Section 0C TECH 2 in the VT Series I Service Information.