Vauxhall Workshop Service and Repair Manuals

No.

TECH 1 Display

Conditions for Checking

Nominal Value

Trouble Codes

Terminal

24

INJECTION PULSE

Engine OFF, engine cold

Throttle valve completely CLOSED

Throttle valve completely OPEN (100%)

Engine running at idle speed, operating temperature

greater than 4.5 ms

less than 4.5 ms

0.8 to 1.5 ms

-

C 10,

C 11 /

C 4

Trouble-shooting:

Nominal Value:

Cause of Fault:

(If nominal value is not attained)

The injection period is an internal value of the control unit.

If the injection period deviates considerably from the above values, check the following points:

All consumers switched off                                                   ?

COOLANT TEMP.           (P 30)                                 OK    ?        (test step 03)

INTAKE AIR TEMP.        (P 29)                                 OK    ?        (test step 04)

O2 SENSOR LOOP         closed                                OK    ?        (test step 17)

O2 INTEGRATOR                                                      OK    ?        (test step 19)

O2 BLM CELL NO.                                                   OK    ?        (test step 21)

O2 BLM CELL CONT                                               OK    ?        (test step 22)

PARK/NEUTRAL SW.     in idle position (P-N)         OK    ?        (test step 09)

TPS SIGNAL                    (P 34)                                 OK    ?        (test step 06)

MAP SENSOR                 (P 23)                                 OK    ?        (test step 05)

IDLE AIR CONTROL      (M 66)                               OK    ?        (test step 15)

If all the above checking points are OK:                     disconnect control unit from the vehicle electrical system (reset), repeat check

·   Select TECH 1 mode "F8"

·   Using arrow keys, increase idle speed (1800 rpm)

·   Switch off consumers

1.2 to 1.4 ms

·   Using arrow key on TECH 1, adjust to 800 rpm

The injection period should increase slightly due to a decrease in the engine speed

·   Control unit defective

·   Ignition OFF

·   Using multimeter, measure voltage:

from:      injector Ter. 1

to:          injector Ter. 2

·   Engine cold

15 W - 16.5 W at

(20 °C/68 °F - 40 °C/104°F)

·   Defective nozzle

Astra Multi-Info-Display receives no

consumption signal:

·   Disconnect wiring harness plug X 9.

·   Measure voltage:

from:      wiring harness plug X 9 Ter. 5

to:          ground

·   Ignition ON

greater than 11 volts

·   Lead interruption

from:      control unit K 57/K 91 Ter. B 4

to:          wiring harness plug X 9 Ter. 5

·   Short circuit in wiring harness

from: control unit K 57/K 91 Ter. B 4

to:          ground

·   Ignition OFF

·   Disconnect wiring harness plug K 57/K 91

·   Measure voltage:

from:      wiring harness plug X 9 Ter. 5

to:          ground

less than 1 volts

·   Short circuit in wiring harness

from:      control unit K 57/K 91 Ter. B 4

to:          battery Ter. 30

·   Measure voltage:

from:      wiring harness coupling X 9 Ter. 5

to:          ground

·   Ignition ON

greater than 11 volts

·   Lead interruption

from:      Multi-Info-Display control unit X 20 Ter. 21

to:          wiring harness coupling X 9 Ter. 5

·   Short circuit in wiring harness

from:      Multi-Info-Display control unit X 20 Ter. 21

to:          ground

·   Multi-Info-Display defective

·   Ignition OFF

·   Disconnect wiring harness plug X 20 at Multi-Info-Display

·   Disconnect wiring harness plug K 57/K 91

·   Measure voltage:

from:      wiring harness coupling X 9 Ter. 5

to:          ground

less than 1 volts

·   Short circuit in wiring harness

from:      Multi-Info-Display control unit X 20 Ter. 21

to:          battery Ter. 30

·   Multi-Info-Display defective