Chart E, Inflatable Restraint Indicator Does Not Come On Steady During Crank: Description
When ignition is first turned on, system voltage is applied from fuse C-22 to Diagnostic Energy Reserve Module (DERM) at SIR INDICATOR HIGH input, and to INFLATABLE RESTRAINT indicator light, which is connected to SIR INDICATOR LOW. Fuse C-23 applies system voltage to IGNITION 1 inputs. DERM responds by flashing INFLATABLE RESTRAINT indicator 7-9 times.
When engine is being cranked, system voltage is applied from fuse C-21 to DERM at CRANK input. DERM responds by grounding SIR INDICATOR LOW output 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 if ignition is on.
NOTE:
Test numbers refer to test numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS.
- Checks whether fault is due to an open fuse C-21.
- Checks for a proper signal to CRANK input during cranking.
- Checks whether lack of a proper crank input signal is due to an open power feed to fuse No. C-21.
- Checks whether fuse No. C-21 is open due to a faulty DERM, short to ground in CRANK INPUT circuit or a fault in starter system circuit.
WARNING:
To avoid air bag deployment and injury when trouble shooting system, only use test equipment specified in diagnostic charts.