Chart C1 - Inflatable Restraint Indicator Comes On Steady: Description
When ignition is first turned on, system voltage is applied from fuse No. 6 to SIR INDICATOR HIGH and INFLATABLE RESTRAINT indicator light, which is connected to SIR INDICATOR LOW. Fuse No. 7 applies system voltage to IGNITION 1 inputs A3 and B3. Diagnostic Energy Reserve Module (DERM) responds by flashing INFLATABLE RESTRAINT indicator 7-9 times.
When engine is cranked, system voltage is applied to DERM at CRANK input. DERM grounds light circuit until system voltage is removed from CRANK input. This results in a steady INFLATABLE RESTRAINT indicator during cranking. After engine is cranked, DERM will again flash INFLATABLE RESTRAINT indicator 7-9 times.
NOTE:
Test numbers refer to numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS.
WARNING:
To avoid air bag deployment while trouble shooting SIR system, only use test equipment specified in diagnostic charts. Under no circumstances should battery powered test equipment or test light be used. Carefully follow all instructions.
- An open fuse No. 7 will result in a loss of IGNITION 1 voltage at DERM. DERM will respond by grounding light circuit (SIR INDICATOR LOW) whenever ignition is on.
- A disconnected DERM harness connector will cause INFLATABLE RESTRAINT light to come on steady via shorting bar from terminal A1 to terminal B1.
- Checks for a short to voltage in CRANK circuit.