- 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 circuit for the side collision sensor RH (to determine deployment of the front seat side airbag RH and curtain shield airbag RH) for 2 seconds.
- A side airbag sensor RH malfunction.
- A rear airbag sensor RH malfunction.
- 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: RM000002P5F00BX |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DESCRIPTION (2008 LX570) | ||
|
DTC |
B1632/81 |
Lost Communication with Rear Airbag Sensor RH |
|
DTC |
B1633/81 |
Rear Airbag Sensor Assembly RH Initialization Incomplete |
|
DTC |
B1697/82 |
Lost Communication with Door Side Airbag Sensor LH |
|
DTC |
B1698/82 |
Door Side Airbag Sensor LH Initialization Incomplete |
DESCRIPTION
HINT:
"Door side airbag sensor LH" refers to the side airbag sensor LH.
-
The circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH, rear seat side airbag LH or RH and curtain shield airbag LH or RH) is composed of the center airbag sensor, side airbag sensor LH or RH, and rear airbag sensor LH or RH.
The side airbag sensor LH or RH and rear airbag sensor LH or RH detect impacts to the vehicle and send signals to the center airbag sensor to determine if the airbag should be deployed.
DTC B1632/81 or B1697/82 is stored when a malfunction is detected in the circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH, rear seat side airbag LH or RH and curtain shield airbag LH or RH).
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1632/81 |
When one of the following conditions is met: |
|
|
B1633/81 |
When one of the following conditions is met:
|
|
|
B1697/82 |
When one of the following conditions is met:
|
|
|
B1698/82 |
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 |
(a) Turn the engine switch on (IG).
(b) Clear the DTCs stored in the memory
.
(c) Turn the engine switch off.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Check for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC B1632, B1633, B1697 and B1698 are not output |
A |
|
DTC B1697 or B1698 is output |
B |
|
DTC B1632 or B1633 is output |
C |
HINT:
Codes other than DTC B1632, B1633, B1697 and B1698 may be output at this time, but they are not related to this check.
|
|
2. |
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, the side airbag sensor RH and rear airbag sensor RH.
OK:
The connectors are properly connected.
|
|
3. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor, rear airbag sensor RH and side airbag sensor RH.
(b) Check that the connectors (on the center airbag sensor side, rear airbag sensor RH side and side airbag sensor RH side) are not damaged.
OK:
The connectors are not deformed or damaged.
|
|
4. |
CHECK SIDE AIRBAG SENSOR RH |
(a) Connect the connector to the center airbag sensor.
(b) Interchange the side airbag sensor LH with RH and connect the connectors to them.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory
.
(f) Turn the engine switch off.
(g) Turn the engine switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC B1632, B1633, B1697 and B1698 are not output |
A |
|
DTC B1697 or B1698 is output |
B |
|
DTC B1632 or B1633 is output |
C |
HINT:
Codes other than DTC B1632, B1633, B1697 and B1698 may be output at this time, but they are not related to this check.
(i) Turn the engine switch off.
(j) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(k) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.
|
|
5. |
CHECK REAR AIRBAG SENSOR RH CIRCUIT |
(a) Disconnect the connectors from the side airbag sensor RH and rear airbag sensor RH.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
I9-2 (BCR-) - Body ground |
Engine switch on (IG) |
Below 1 V |
(d) Turn the engine switch off.
(e) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(f) Using a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector E.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - I9-2 (BCR-) |
Always |
Below 1 Ω |
(h) Disconnect the service wire from connector E.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - I9-2 (BCR-) |
Always |
1 MΩ or higher |
|
I9-1 (BCR+) - Body ground |
Always |
1 MΩ or higher |
|
I9-2 (BCR-) - Body ground |
Always |
1 MΩ or higher |
|
|
6. |
CHECK REAR AIRBAG SENSOR RH |
(a) Connect the connector to the side airbag sensor RH.
(b) Temporarily replace the rear airbag sensor RH with a new one.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory
.
(f) Turn the engine switch off.
(g) Turn the engine switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs
.
OK:
DTC B1632 or B1633 is not output.
HINT:
Codes other than DTC B1632 and B1633 may be output at this time, but they are not related to this check.
|
|
7. |
CHECK FRONT DOOR WIRE RH (SIDE AIRBAG SENSOR RH - NO. 2 FLOOR WIRE) |
(a) Disconnect the front door wire RH connector from the No. 2 floor wire.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
I9-2 (BCR-) - Body ground |
Engine switch on (IG) |
Below 1 V |
(d) Turn the engine switch off.
(e) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(f) Using a service wire, connect terminals 2 (BCR+) and 1 (BCR-) of connector C.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - I9-2 (BCR-) |
Always |
Below 1 Ω |
(h) Disconnect the service wire from connector C.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I9-1 (BCR+) - I9-2 (BCR-) |
Always |
1 MΩ or higher |
|
I9-1 (BCR+) - Body ground |
Always |
1 MΩ or higher |
|
I9-2 (BCR-) - Body ground |
Always |
1 MΩ or higher |
|
|
8. |
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, the side airbag sensor LH and rear airbag sensor LH.
OK:
The connectors are properly connected.
|
|
9. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor, rear airbag sensor LH and side airbag sensor LH.
(b) Check that the connectors (on the center airbag sensor side, rear airbag sensor LH side and side airbag sensor LH side) are not damaged.
OK:
The connectors are not deformed or damaged.
|
|
10. |
CHECK REAR AIRBAG SENSOR LH |
(a) Connect the connector to the center airbag sensor.
(b) Temporarily replace the rear airbag sensor LH with a new one.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory
.
(f) Turn the engine switch off.
(g) Turn the engine switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs
.
OK:
DTC B1697 and B1698 are not output.
HINT:
Codes other than DTC B1697 and B1698 may be output at this time, but they are not related to this check.
|
|
11. |
CHECK SIDE AIRBAG SENSOR LH CIRCUIT |
(a) Turn the engine switch off.
(b) Disconnect the connectors from the rear airbag sensor LH and side airbag sensor LH.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
K7-2 (BCL-) - Body ground |
Engine switch on (IG) |
Below 1 V |
(e) Turn the engine switch off.
(f) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(g) Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector E.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - K7-2 (BCL-) |
Always |
Below 1 Ω |
(i) Disconnect the service wire from connector E.
(j) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - Body ground |
Always |
1 MΩ or higher |
|
K7-2 (BCL-) - Body ground |
Always |
1 MΩ or higher |
|
|
12. |
CHECK SIDE AIRBAG SENSOR LH |
(a) Connect the connector to the rear airbag sensor LH.
(b) Interchange the side airbag sensor LH with RH and connect the connectors to them.
(c) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(d) Turn the engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory
.
(f) Turn the engine switch off.
(g) Turn the engine switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs
.
Result
|
Result |
Proceed to |
|---|---|
|
DTC B1632, B1633, B1697 and B1698 are not output |
A |
|
DTC B1632 or B1633 is output |
B |
|
DTC B1697 or B1698 is output |
C |
(i) Turn the engine switch off.
(j) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(k) Return the side airbag sensor RH and LH to their original positions and connect the connectors to them.
|
|
13. |
CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - FRONT DOOR WIRE LH) |
(a) Disconnect the floor wire connector from the front door wire LH.
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - Body ground |
Engine switch on (IG) |
Below 1 V |
|
K7-2 (BCL-) - Body ground |
Engine switch on (IG) |
Below 1 V |
(d) Turn the engine switch off.
(e) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(f) Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.
NOTICE:
Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - K7-2 (BCL-) |
Always |
Below 1 Ω |
(h) Disconnect the service wire from connector C.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K7-1 (BCL+) - Body ground |
Always |
1 MΩ or higher |
|
K7-2 (BCL-) - Body ground |
Always |
1 MΩ or higher |
|
|
|