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Checking
Checking with TECH 1
TECH 1, Connect to
Vehicle
Before connecting the
equipment, read the TECH 1 Operating Instructions carefully.
· Ignition OFF
· Connect TECH 1 to diagnostic plug in engine compartment
The following is displayed
in the given language:
· DISPLAY CAPTURED DATA FROM LAST SNAPSHOT? Answer with
"NO".
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· Type in Model Year (2 digits) e.g. "90" for MY 1990
· Select vehicle type with "YES" or "NO" key:
CORSA-A/NOVA
or KADETT-E/ASTRA/BELMONT
· STOP ENGINE TURN ON IGNITION Answer with "YES".
· AUTOMATIC SYSTEM IDENTIFICATION? Answer with "NO".
· SELECT ELECTRONIC ENGINE SYSTEM? Answer with "YES".
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· Select C 12 NZ or C 14 NZ with arrow keys and confirm with
"YES".
· The C 12 NZ/C 14 NZ control unit is now sending data to TECH 1.
· Compare CODE & VERSION with Checking Procedures and confirm with
"YES" key.
· If one or more faults are stored in the C 12 NZ/C 14 NZ control
unit, these will be indicated in the TECH 1 display.
· Note the trouble codes.
· Select FO:DATA LIST with "F0" key.
· Start engine, engine at idle speed
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· Compare all data shown in display from test steps 01-24 with the
following nominal values from Section 5.1.3 (Quick Check).
Begin
with test steps 01, 04 and 21.
· Press "EXIT" key and, if necessary, select
mode "F5", "F6" or "F7".
· Where there are variations from the nominal values in the Quick Check
List, carry out trouble-shooting according to section 5.1.6.
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Note: The program modules may only be changed or
inserted with ignition OFF by pressing the two outer catches.
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Trouble-shooting Chart
Should these complaints
arise, the test steps marked x are to be examined more closely.
Customer Complaint
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Starter turns, engine starts
poorly or not at all
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Engine starts but stalls
again
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Idling problems (engine
speed, exhaust)
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Poor acceptance of fuel,
transitional trouble
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Engine misfiring (ignition, injection)
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Poor engine performance/top speed
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Fuel consumption too high
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Engine diesels
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Engine pings, knocks
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Engine gets too hot
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Engine stalls at traffic lights
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Warning lamp permanently or occasionally on
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Possible Causes
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Test Step No
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Trouble Codes
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*
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*
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BATTERY
VOLTAGE
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01
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*
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*
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*
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*
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COOLANT
TEMP.
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02
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14, 15
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*
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*
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*
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*
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*
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*
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MAP
SENSOR
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03
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33, 34
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*
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*
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*
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*
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*
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*
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*
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TPS
SIGNAL
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04
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21, 22
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*
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*
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*
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*
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*
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*
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*
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*
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ENGINE
SPEED, spark plug quality?
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05
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35
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*
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*
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*0
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*
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IDLE
AIR CONTROL.
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06
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35
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*
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*
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*
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*
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*
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*
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*
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*
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*
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02
SENSOR
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08
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13, 44, 45
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*
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*
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*
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*
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*
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*
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*
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*
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*
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O2
INTEGRATOR
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09
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13, 44, 45
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*
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*
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*
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*
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O2
BLM IDLE THR.
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10
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13, 44, 45
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*
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*
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*
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*
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*
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*
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02
BLM PART THR.
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11
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13, 44, 45
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*
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*
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O2
BLM ENABLE
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12
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13, 44, 45
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*
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AIR/FUEL
RATIO, active carbon canister line
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13
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13, 44, 45
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*
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*
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VEHICLE
SPEED
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14
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24
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*
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*
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VEHICLE
SP.PULSE
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15
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24
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*
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*
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RON
CODING
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16
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*
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*
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*
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*
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*
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*
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*
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*
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*
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SPARK
ADVANCE, spark plug quality?
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17
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*
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*
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*
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*
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*
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*
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*
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DEC.
FUEL CUTOFF
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18
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*
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*
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*
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*
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*
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POWER
ENRICHMENT
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19
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*
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*
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*
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*
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*
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*
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*
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CLEAR
FLOOD MODE
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20
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*
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*
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*
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*
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INJECTION
PULSE
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21
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*
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PARK/NEUTRAL
SW.
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22
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*
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DIAG.
REQUEST
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23
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*
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*
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CONTROLLED
RPM
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24
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*
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Read
off trouble code in mode F2
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