NO.2 AIR BAG SYSTEM WARNING LIGHT IS ILLUMINATED ALL THE TIME

id0803a3800600

2

Air bag system warning light is illuminated all the time.

DETECTION CONDITION

Malfunction in air bag system warning light circuit (open circuit or short to power supply).

POSSIBLE CAUSE

• Weak battery
• SAS control module malfunction
• Instrument cluster (print plate) malfunction
• No connection in SAS control module connector
• Poor contact in instrument cluster connector (16-pin)
• Open or short to power supply circuit in wiring harness between instrument cluster and SAS control module
• Poor contact at terminals 1T, 1X and/or 1W of SAS control module connector
• Poor contact in wiring harness between terminal 1X of SAS control module connector and ground
• Poor contact in wiring harness between AIR BAG 15 A fuse and terminal 1W of SAS control module

Diagnostic Procedure

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

STEP

INSPECTION

ACTION

1
INSPECT BATTERY
• Measure voltage of battery.
• Is voltage 9 V or more?
Yes
Go to the next step.
No
Battery is weak.
Inspect charge/discharge system, then go to Step 10.
2
VERIFY THAT SAS CONTROL MODULE CONNECTOR IS CONNECTED
Warning
• Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components.
(See SERVICE WARNINGS.)
(See SERVICE CAUTIONS.)
• Turn ignition switch to LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Turn up floor covering.
• Are all SAS control module connectors securely connected?
Yes
Go to the next step.
No
Reconnect connector properly, then go to Step 10.
* 3
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND INSTRUMENT CLUSTER FOR CONTINUITY
• Remove the column cover.
• Disconnect the clock spring connector.
• Remove the glove compartment.
• Disconnect the passenger-side air bag module connector.
• Disconnect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Disconnect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Remove the B-pillar lower trims. (Vehicle with pre-tensioner seat belt)
• Disconnect the driver- and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect the all SAS control module connectors.
• Disconnect the instrument cluster connector.
• Is there continuity between SAS control module connector terminal 1T and instrument cluster connector terminal 1O?
Yes
Go to the next step.
No
Replace wiring harness, then go to Step 10.
* 4
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
• Connect the negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at instrument cluster connector terminal 1O.
• Is voltage approx. 9 V or more?
Yes
Replace wiring harness, then go to Step 10.
No
Go to the next step.
5
CHECK TO SEE WHETHER MALFUNCTION IS IN AIR BAG SYSTEM WARNING LIGHT IN INSTRUMENT CLUSTER
• Connect the instrument cluster connector terminal 1O to ground, then reconnect connector.
• Does air bag system warning light illuminate with ignition switch ON?
Yes
Replace instrument cluster, then go to Step 10.
No
Go to the next step.
6
INSPECT POWER SUPPLY CIRCUIT OF SAS CONTROL MODULE (TERMINAL 1W)
• Turn ignition switch to LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the all SAS control module connectors.
• Connect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt)
• Connect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Connect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Connect the passenger-side air bag module connector.
• Connect the clock spring connector.
• Inspect voltage for PID/DATA monitor RCM VOLT item using SST (WDS or equivalent ).
• Is voltage of at least either terminal 9 V or more?
Yes
Go to Step 9.
No
Go to the next step.
7
INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK
• Remove the driver-side front side trim.
• Remove the fuse block without disconnecting connectors.
• Turn ignition switch to ON position.
• Measure voltage at terminals D (JB-01) of fuse block connector.
• Is voltage of at least either terminal 9 V or more?
Yes
Go to the next step.
No
Repair wiring harnesses, then go to Step 9.
8
INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND SAS CONTROL MODULE
• Measure voltage at terminals G (JB-03) of fuse block connector.
• Is voltage of at least either terminal 9 V or more?
Yes
Repair wiring harnesses, then go to Step 10.
No
Inspect fuse block, then go to Step 10.
9
VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 1X IS GROUND
• Turn ignition switch to LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Remove the column cover.
• Disconnect the clock spring connector.
• Remove the glove compartment.
• Disconnect the passenger-side air bag module connector.
• Disconnect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Disconnect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Remove the B-pillar lower trim. (Vehicle with pre-tensioner seat belt)
• Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect the all SAS control module connectors.
• Inspect wiring harness between SAS control module connector terminal 1X and ground for following:
- Short to power supply
- Open circuit
• Is wiring harness normal?
Yes
Replace SAS control module, then go to the next step.
No
Replace wiring harnesses, then go to the next step.
10
CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Turn ignition switch to LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the all SAS control module connectors.
• Connect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt)
• Connect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Connect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Connect the passenger-side air bag module connector.
• Connect the clock spring connector.
• Connect the instrument cluster connector.
• Connect the negative battery cable.
• Turn ignition switch to ON position.
• Does air bag system warning light operate properly?
Yes
Complete troubleshooting, then explain repairs to customer.
No
Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.