DESCRIPTION
INSPECTION PROCEDURE
CHECK SRS WARNING LIGHT
CHECK CONNECTION OF CONNECTORS
CHECK INSTRUMENT PANEL WIRE (OPEN)
CHECK INSTRUMENT PANEL WIRE (SHORT)
CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
CHECK AIRBAG CUT OFF SWITCH CYLINDER
AIRBAG SYSTEM - Trouble in Passenger Airbag ON / OFF Indicator
DESCRIPTION
This circuit detects the manual cut off switch status.
The passenger airbag ON/OFF indicator comes on to inform the passengers of the front passenger airbag assembly, front passenger side knee airbag assembly and the front seat side airbag assembly (passenger side) status (activated or deactivated).
- Approximately 6 seconds after the engine switch is turned to the on (IG), the passenger airbag ON/OFF indicator will be ON/OFF depending on the conditions listed below.
| Manual cut off switch | Passenger airbag ON/OFF indicator | SRS Warning Light |
| ON indicator | OFF indicator |
| ON position | ON | OFF | OFF |
| OFF position | OFF | ON | OFF |
| Switch failure | OFF | ON | ON |
INSPECTION PROCEDURE
| 1.CHECK SRS WARNING LIGHT |
Turn the engine switch on (IG), and check the SRS warning light condition.
- If this trouble occurs, the SRS warning light is off. If it is on, a DTC is output. Troubleshoot for the output DTC.
- OK:
- After the primary check period, SRS warning light goes off.
- The primary check period is approximately 6 seconds after the ignition switch is turned on (IG).
| 2.CHECK CONNECTION OF CONNECTORS |
Turn the engine switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Check that the connectors are properly connected to the center airbag sensor assembly and the airbag cut off switch cylinder.
- OK:
- The connectors are properly connected.
| | CONNECT CONNECTORS, THEN GO TO STEP 1 |
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| 3.CHECK INSTRUMENT PANEL WIRE (OPEN) |
Disconnect the connectors from the center airbag sensor assembly and the airbag cut off switch cylinder.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Condition | Specified condition |
J91-2 (PMC+) -
J91-1 (PMC-) | Always | Below 1 Ω |
| | REPAIR OR REPLACE INSTRUMENT PANEL WIRE |
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| 4.CHECK INSTRUMENT PANEL WIRE (SHORT) |
Release the activation prevention mechanism built into connector "B".
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Condition | Specified condition |
J91-2 (PMC+) -
J91-1 (PMC-) | Always | 1 MΩ or higher |
| | REPAIR OR REPLACE INSTRUMENT PANEL WIRE |
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| 5.CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Condition | Specified condition |
J91-2 (PMC+) -
Body ground | Always | 1 MΩ or higher |
J91-1 (PMC-) -
Body ground | Always | 1 MΩ or higher |
| | REPAIR OR REPLACE INSTRUMENT PANEL WIRE |
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| 6.CHECK INSTRUMENT PANEL WIRE (SHORT TO B+) |
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the engine switch on (IG).
Measure the resistance according to the value(s) in the table below.
- Standard voltage:
| Tester connection | Condition | Specified condition |
J91-2 (PMC+) -
Body ground | Engine switch on (IG) | Below 1 V |
J91-1 (PMC-) -
Body ground | Engine switch on (IG) | Below 1 V |
| | REPAIR OR REPLACE INSTRUMENT PANEL WIRE |
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| 7.CHECK AIRBAG CUT OFF SWITCH CYLINDER |
Turn the engine switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
| Tester connection | Manual cut off switch condition | Specified condition |
J91-2 (PMC+) -
J91-1 (PMC-) | Cut off switch is in ON position | 360 to 440 Ω |
J91-2 (PMC+) -
J91-1 (PMC-) | Cut off switch is in OFF position | 90 to 110 Ω |
| | REPLACE AIRBAG CUT OFF SWITCH CYLINDER |
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| OK | |
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| REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
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LEXUS IS250, IS220d / GSE20 ALE20
