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B1227

B1227

Bulb 1 in the SRS symbol, short circuit to battery positive (bulb connected to control module pin 5).


Cars with central warning lamp


1. Make a note of the diagnostic trouble code and then clear it. Switch the ignition off and on again, wait for at least 40 seconds with the ignition switched on and check to see whether the diagnostic trouble code recurs.

If it does, it is a permanent fault. Proceed to point 2.

If it does not, the fault is intermittent.

Leave the ignition switched on and jiggle the connectors and wiring to check for an open circuit or loose contact. Switch the ignition off and then on again. With the ignition switched on, wait for at least 40 seconds and then check whether the diagnostic trouble code recurs.

2. Unscrew the steering wheel airbag and unplug the connector at the back of the airbag. Connect reference resistor 84 71 153 to the connector.

On cars with a passenger airbag, remove the glove box, unplug the connector on the underside of the passenger airbag and connect reference resistor 84 71 153 to the connector.

3. Unplug the connector from the control module and connect a BOB. Unplug the connector behind the instrument unit, switch on the ignition and take a voltage reading across pin 5 and a good grounding point.



If the reading shows battery voltage, the fault is in the wiring between the instrument unit's connector and the control module's connector.

Investigate the cause and remedy the fault.

If the reading shows no voltage, proceed to point 4.

4. Change the bulb. Plug in the connectoros, switch on the ignition and clear the diagnostic toruble code. Switch the ignition off and then on again, wait for at least 40 seconds and then check to see whether the diagnostic trouble code recurs.


If it does, continue fault diagnosis as described in Service Manual 3:5 under main instrument unit . If the fault persists after this, continue to .