Chart C, Inflatable Restraint Indicator Comes On Steady: 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 cranked, system voltage is applied from fuse C-21 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 fuse C-23 would result in a loss of IGNITION 1 voltage at DERM. DERM will respond by grounding SIR INDICATOR LOW output 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 whether short to ground caused fuse C-23 to open.
- Checks whether short to ground is due to faulty DERM or short to ground in IGNITION 1 circuit.
- Checks for open in IGNITION 1 circuit No. 1139 and junction connector.
- Checks whether fault is caused by a short to voltage in crank circuit No. 806 or a faulty DERM.