Impreza L Sport Wagon F4-2.2L SOHC (1999)
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Front sub sensor (LH) is faulty.
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Airbag control module is faulty.
CAUTION: Before performing diagnostics on airbag system, turn ignition switch "OFF", disconnect battery ground terminal, and then wait atleast 20
seconds.
5L1: FRONT SUB SENSOR (LH) AND FRONT SUB SENSOR HARNESS (LH) INSPECTION
1. Disconnect connector (AB6) from airbag control module and connect it to test harness I connector (1I).
2. Measure resistance between test harness I connector (3I) terminal.
CHECK: Is the resistance between 750 Ohms and 1 k Ohms?
YES:
Replace airbag control module.
NO:
Go to step 5L2.
5L2: FRONT SUB SENSOR (LH) AND FRONT SUB SENSOR HARNESS (LH) INSPECTION
Measure resistance across test harness I connector (3I) terminal and chassis ground.
CHECK: Is the resistance more than 10 k Ohms?
YES:
Replace airbag control module.
NO:
Go to step 5L3.
5L3: FRONT SUB SENSOR (LH) AND FRONT SUB SENSOR HARNESS (LH) INSPECTION
Measure resistance across test harness I connector (3I) terminal and chassis ground.
CHECK: Is the resistance more than 10 k Ohms?