Chart E - Inflatable Restraint Indicator Does Not Come On Steady During Crank: Description
When ignition is first turned on, system voltage is applied through fuse No. 6 to REDUNDANT INDICATOR IGNITION 1 input and INFLATABLE RESTRAINT indicator light, which is connected to SIR INDICATOR output. Fuse No. 7 applies system voltage to IGNITION 1 inputs. Diagnostic Energy Reserve Module (DERM) responds by flashing INFLATABLE RESTRAINT indicator 7 times.
When engine is being 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 times if ignition is on.
NOTE:
Test numbers refer to test numbers on diagnostic chart. For circuit number identification, see WIRING DIAGRAMS.
WARNING:
To avoid air bag deployment while troubleshooting the 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.
- Checks whether CRANK fuse No. 1 is open due to a short to ground in CRANK input circuit.
- Checks for a possible internal DERM fault.
- Checks for system voltage at DERM's CRANK input during cranking.
- Determines whether missing CRANK signal is due to an open CRANK input circuit or an open power feed to CRANK fuse No. 1.