- An occupant classification system malfunction.
- The center airbag sensor receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the occupant classification system circuit for 2 seconds.
- A center airbag sensor malfunction.
| Last Modified: 11-27-2007 | 1.6 C | |
| Service Category: Vehicle Interior | Section: Supplemental Restraint Systems | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000016WN01FX |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B1650/32 |
Occupant Classification System Malfunction |
DESCRIPTION
The occupant classification system circuit consists of the center airbag sensor and the occupant classification system.
If the center airbag sensor receives signals from the occupant classification ECU, it determines whether the front passenger airbag, the front seat side airbag RH and front seat outer belt should be operated.
DTC B1650/32 is stored when a malfunction is detected in the occupant classification system circuit.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1650/32 |
When one of the following conditions is met: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
-
w/ Navigation system:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
-
When disconnecting the cable from the negative (-) battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected
.
PROCEDURE
|
1. |
CHECK FOR DTC (OCCUPANT CLASSIFICATION ECU) |
(a) Turn the engine switch on (IG), and wait for at least 10 seconds.
(b) Check for DTCs of the occupant classification ECU
.
OK:
DTC is not output.
|
|
2. |
CHECK FOR DTC (CENTER AIRBAG SENSOR) |
(a) Turn the engine switch on (IG), and wait for at least 60 seconds.
(b) Clear the DTCs
.
(c) Turn the engine switch off.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Check for DTCs
.
OK:
DTC B1650 is not output.
HINT:
Codes other than DTC B1650 may be output at this time, but they are not related to this check.
|
|
3. |
CHECK CONNECTION OF CONNECTORS |
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor and the occupant classification ECU.
OK:
The connectors are properly connected.
|
|
4. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor and the occupant classification ECU.
(b) Check that the connectors (on the center airbag sensor side and occupant classification ECU side) are not damaged.
OK:
The connectors are not deformed or damaged.
|
|
5. |
CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT |
(a) Using a service wire, connect terminals 16 (FSR+) and 22 (FSR-) of connector B.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c8-11 (FSR+) - c8-12 (FSR-) |
Always |
Below 1 Ω |
(c) Disconnect the service wire from connector B.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
c8-11 (FSR+) - c8-12 (FSR-) |
Always |
1 MΩ or higher |
|
c8-11 (FSR+) - Body ground |
Always |
1 MΩ or higher |
|
c8-12 (FSR-) - Body ground |
Always |
1 MΩ or higher |
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
c8-11 (FSR+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
c8-12 (FSR-) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
|
6. |
CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - FRONT SEAT WIRE RH) |
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the front seat wire RH connector from the No. 2 floor wire.
(d) Using a service wire, connect terminals 16 (FSR+) and 22 (FSR-) of connector B.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Lc2-6 (FSR+) - Lc2-7 (FSR-) |
Always |
Below 1 Ω |
(f) Disconnect the service wire from connector B.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
Lc2-6 (FSR+) - Lc2-7 (FSR-) |
Always |
1 MΩ or higher |
|
Lc2-6 (FSR+) - Body ground |
Always |
1 MΩ or higher |
|
Lc2-7 (FSR-) - Body ground |
Always |
1 MΩ or higher |
(h) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(i) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
Lc2-6 (FSR+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
Lc2-7 (FSR-) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
|
|