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B1337

B1337

Electric detonator 2, open circuit



Cars with no passenger airbag

These cars have a resistor in the wiring about 10 cm from the control module. The resistor is mounted in the housing of a Scatt connector.


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.

Check to see if the diagnostic trouble code returns.

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/loose contact. Note whether the SRS lamp starts to flash again. If it does, check to see whether the diagnostic trouble code has recurred.

2. Unscrew the steering wheel airbag and connect reference resistor 84 71 153 to the connector.

3. Unplug the connector at the control module nd check pins 6 and 8 for open circuit/contact pin slide-out. Close the connector, switch on the ignition and clear the diagnostic trouble code. Switch the ignition off and on again, wait for at least 40 seconds and then check to see whether the diagnostic trouble code recurs.


If the diagnostic trouble code has gone, the connector was at fault.

If the diagnositc trouble code recurs, proceed to point 4.

4. Switch off the ignition and open the connector with the resistor. Connect an ohmmeter to the pins in the connector with the resistor.


If the resistance reading is high, change the resistor complete with connector.

If the resistance is 2-3 ohms, the fault is in the wiring between the resistor's connector and the control module's connector.

Investiage the causes. Change the wiring harness.

Switch on the ignition and clear the diagnostic trouble code. Switch the ignition off and on again, wait for at least 40 seconds and then check to see whether the diagnostic trouble code recurs.


Important

Check that no other diagnostic trouble codes are generated. The diagnostic trouble code for open circuit can prevent the control module from continuing diagnosis on the detonator circuits.



If the diagnostic trouble code for an open circuit recurs, proceed to .