Isuzu 2000 Trooper Workshop Manual page 2111

9J1–10 RESTRAINT CONTROL SYSTEM
Chart C "AIR BAG" Warning Lamp Does Not Come "ON" Steady (1/2)
Circuit Description:
When the ignition switch is first turned "ON", "Ignition 1"
voltage is applied from the "C–10" fuse to the "AIR BAG"
warning lamp which is connected to "SRS Warning
Lamp", terminal "7". The "C–21" fuse apply system
voltage to the "Ignition 1" inputs, terminals "12". The SDM
responds by flashing the "AIR BAG" warning lamp seven
times. If "Ignition 1" is more than 16 volts, the "AIR BAG"
warning lamp will be still "OFF" solid with no DTCs set.
Chart Test description:
Number(s) below refer to step number(s) on the
diagnostic chart:
1. This test decides whether power is available to SDM
warning lamp power feed circuit.
2. This test determines whether the voltage is present
in the warning lamp circuit.
3. This test determines if the malfunction is in the
instrument cluster.
4. This test checks for open in the warning lamp
circuitry.
5. This test isolates the IB04–WHT/RED circuit and
checks for a short in the IB04–WHT/RED circuit to
B+.
8. This test checks for a short from the SDM warning lamp
power feed circuit to ground.
9. This test determines whether the short to ground is due
to a short in the wiring.
D09RW001