Chart C, Inflatable Restraint Indicator Comes On Steady: Description
When ignition is first turned on, system voltage is applied through IG fuse to SIR INDICATOR HIGH and INFLATABLE RESTRAINT indicator light, which is connected to SIR INDICATOR LOW. SIR fuse also applies system voltage to IGNITION 1 inputs. Diagnostic Energy Reserve Module (DERM) responds by flashing INFLATABLE RESTRAINT indicator 7-9 times.
When engine is cranked, system voltage is applied from ST fuse 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 test numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS
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- An open SIR fuse would result in a loss of IGNITION 1 voltage at DERM. DERM will respond by grounding light circuit (SIR INDICATOR LOW) whenever ignition is on.
- If DERM and SIR harness connector are disconnected, shorting bar between terminals A1 and B1 of harness connector will ground light circuit.
- Checks for a short from SIR INDICATOR LOW circuit to ground.
- Checks for an open in IGNITION 1 circuit.
- Checks for a short from CRANK input circuit to voltage.
- Checks whether a short to ground caused SIR IG fuse to open.
- Checks whether short to ground is due to faulty DERM or short to ground in IGNITION 1 circuit.