HOLDEN GEN III V8, Обучение по обслуживанию

Страница: 110 / 113

GEN III V8 ENGINE MANAGEMENT
TECH 2 TEST MODES AND DISPLAYS FOR PCM DIAGNOSIS
As a prerequisite to any PCM diagnostics the user must be familiar with the proper use of TECH 2. The
following pages list the major TECH 2 functions and provide a brief explanation of their operation for diagnosing
the PCM.
Once GEN III V8 has been selected the following functions are available:
FO: Diagnostic Trouble Codes
In this test mode, DTCs stored by the PCM maybe displayed or cleared. When FO: Diagnostic Trouble Codes an
there are an additional four modes:
FO: Read DTC Info Ordered By Priority: DTC(s) will be displayed in numerical order.
F1: Clear DTC Information: Clears all DTC(s) in the PCM memory. Also clears Freeze Frame/Failure
Records, so before clearing DTC(s), be sure to retrieve Freeze Frame / Failure Record information.
F2: DTC Information: Shows DTC(s) which are set that match the criteria. Each DTC has it's own page of
information. If multiple DTCs are set, the user must page through the display of codes.
FO: History: This DTC search will display only DTC(s) that are stored in the PCM memory as Valid
Faults.
F1: MIL SVS or Message Requested: This DTC search will display only DTC(s) for which the PCM is
requesting the Check Powertrain Lamp to turn "ON".
F2: Last Test Failed: This DTC search will display only DTCs that failed the last time the test ran.
F3: Test Failed Since Code Cleared: This DTC search will display all DTCs that have reported a test
failure since the last time DTCs were cleared.
F4: Not Ran Since Code Cleared: This DTC search will display only DTCs that have not ran since
DTCs were last cleared. Any displayed DTCs have not run, therefore their condition (passing or
failing) is unknown.
F5: Failed This Ignition: This DTC search will display all DTCs that have failed at least once during the
current ignition cycle.
F3: Freeze Frame / Failure Records: Shows Freeze Frame / Failure Records information. Freeze Frame /
Failure Records are types of snapshots stored in the memory of the PCM and contain 32 data
parameters.
F1: Data Display
This mode displays data parameters for the controller being diagnosed. When entering this mode, there are two
modes;
FO: Engine Data: In this test mode, the Tech 2 continuously monitors and displays system data, such as:
engine speed, engine coolant temperature etc.
F1: Fuel Trim Data: In this test mode, the Tech 2 scan tool continuously monitors and displays system
data, such as: engine speed data, engine coolant temperature, H02S, Fuel Trim Cell etc.
F2:Snapshot
In this test mode, the Tech 2 scan tool captures data before and after a snapshot triggering condition which
may or may not set a DTC.
GEN III V8 ENGINE MANAGEMENT Page - 1 0 5