No Air Bag Indicator

Inoperative Lamp Circuit Or No Ignition Voltage To Diagnostic Monitor

Normal Operation

The air bag indicator is designed to light for 6 (± 2) seconds when the ignition key is turned to the ON position. This initial 6 seconds of air bag indicator illumination (continuous lamp) is considered normal operation and is called "prove-out" of the air bag indicator.

The diagnostic monitor requires power at Pin 1 or 6 in order to energize the air bag indicator circuit. If the air bag indicator circuit is open or the diagnostic monitor does not have ignition voltage at Pin 1 or 6, the air bag indicator will not light.

Possible Causes

A No Air Bag Indicator condition can be caused by:

1. A burned out bulb or open wiring in the air bag indicator circuit.

2. Loss of ignition voltage at Pins 1 or 6 of the diagnostic monitor.

NO AIR BAG INDICATOR

NAB-1 CHECK FOR IGNITION VOLTAGE

• Deactivate system.

• Disconnect diagnostic monitor.

• Turn ignition switch to RUN.

• Measure voltage between Pins 1 (+) and 3 (-).

• Is voltage measured equal to battery voltage?

GO to NAB-2.

No
SERVICE open Circuit 640 (R/Y) in "HOT IN RUN" circuit from fuse panel. CHECK Fuse 18. CHECK for proper ground on Pin 3 of diagnostic monitor connector. RECONNECT system. VERIFY system. REACTIVATE system.

 

NAB-2 CHECK FOR OPEN LAMP CIRCUIT

• Leave diagnostic monitor disconnected and key ignition switch in RUN.

• Is air bag indicator on?

Yes
REPLACE diagnostic monitor. RECONNECT system. VERIFY system. REACTIVATE system.

No
LOCATE and SERVICE open circuit in air bag indicator Circuit 608 (BK/Y) or 640 (R/Y). CHECK for burned out or loose bulb. RECONNECT system. VERIFY system. REACTIVATE system.

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