Summarised Checking Procedures for Heaters Which Cannot Be Diagnosed Opel Vectra B

Subject:

Brief Checking Procedures for Auxiliary Heaters Not Capable of Diagnosis

Vehicles:

Vectra - B with X 20 DTL engine (as of MY `97)

Condition:

Remedy:

This Technical Information Bulletin includes the block diagram, a function description and an electronic function check with brief checking procedures. Trouble - shooting for the module with self - diagnosis shall be described in appropriate Checking Procedures when `. he system is introduced.

Block Diagram:

61 Alternator G2, terminal 61 (alternator running)

31 Terminal 31, ground

30 Terminal 30, battery positive

15 Terminal 15, ignition ON

E42 Auxiliary heater (coolant heating)

S69 Heating intake air temperature switch

M69 Dosing pump (fuel dosing pump)

X13 Diagnostic plug, 16 - pin (in system without self - diagnosis, not connected in wiring harness)

Note: The digits within E42 indicate the connections of the 8 - pin auxiliary heater plug.

Function:

Test Conditions:

· Coolant temperature lower than 75 °C / 167 °F (measured inside the auxiliary heater)

· Ambient temperature lower than 5 °C / 41 °F (if ambient temperature is higher than 5 °C / 41 °F, the temperature switch must be bridged or brought down to below 5 °C / 41 °F with cold spray)

· Exhaust suction equipment required

Function Check:

· Inspect electric cable connection.

· Ignition ON, start engine:

Auxiliary heater attempts to start within 270 sec., dosing pump pulses after 45 seconds, manual test is possible.

· If auxiliary heater does not activate, ignition OFF and ON again:

The auxiliary heater makes a further two attempts to start automatically.

· The function of the auxiliary heater cannot be tested when the coolant temperature is higher than 75 °C / 167 °F.

· Check fuses F28 and F38

· Check all wiring harness plugs and system unit plugs

· Check fastening of grounding point 1

· Check fuel and coolant lines for leaks

· Measure voltage between following terminals:

8 - pin auxiliary heater plug, terminal 1

and

ground

· Measure voltage between following terminals:

8 - pin auxiliary heater plug, terminal 2

and

ground

· Detach 2 - pin temperature switch plug (S69) from microfilter and bridge

· Ignition ON

· Measure voltage between following terminals:

8 - pin auxiliary heater plug, terminal 6

and

ground

· Measure voltage between following terminals:

8 - pin auxiliary heater plug, terminal 7

and

ground

· Detach auxiliary heater bracket from bulkhead (3 nuts - M6)

· Unscrew dosing pump from auxiliary heater bracket (1 bolt - M6)

· Disconnect fuel hose between dosing pump and auxiliary pump at auxiliary pump (1 clamp)

· Detach exhaust line from auxiliary heater

· Detach 2 - pin dosing pump plug and 8 - pin auxiliary heater plug

· Remove dosing pump upwards

All vehicles:

· Detach 2 - pin dosing pump plug

· Connect one connection of dosing pump to battery positive terminal using corresponding adapter cable from the Electronic - Kit Dosing pump

· Pulse the other dosing pump connection to the battery operates audibly negative terminal using corresponding adapter cable at regular, brief intervals

or

· Battery voltage too low

or

· Grounding point fastening inadequate

or

· Fuel or coolant lines leaky

- Replace relevant fuse after eliminating the cause of it blowing

- Charge battery

- Fasten grounding point 1 correctly

Fuse F28

and

8 - pin auxiliary heater plug, terminal 1, red cable (1.5 mm2)

8 - pin auxiliary heater plug, terminal 2

and

ground, brown cable (1.5 mm²)

8 - pin auxiliary heater plug, terminal 6

and

2 - pin heating intake air temperature switch plug (S69),

black / white cable (0.5 mm²)

or

· Circuit interruption between

2 - pin heating intake air temperature switch plug (S69)

and

fuse F38, black cable (0.5 mm²)

8 - pin auxiliary heater plug, terminal 7

and

alternator, terminal 61, blue / white cable (0.5 mm²)

Parts:

Time Allowance:

The regular warranty procedure should be used for claiming set - up time.