DESCRIPTION
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1800/51 |
One of the following conditions is met:
|
|
B1801/51 |
One of the following conditions is met:
|
|
B1802/51 |
One of the following conditions is met:
|
|
B1803/51 |
One of the following conditions is met:
|
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
To perform the simulation method, enter check mode (signal check) with the Techstream
(See page ), and then wiggle each connector of
the airbag system or drive the vehicle on various types of road (See page
).
PROCEDURE
1. |
CHECK STEERING PAD (DRIVER SIDE SQUIB) |
(a) Turn the ignition switch off. |
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the connectors from the steering pad.
(d) Connect the white wire side of SST (resistance: 2.1 Ω) to connector E (orange connector).
CAUTION:
Never connect the tester to the steering pad (driver side squib) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
SST: 09843-18061
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Clear the DTCs (See page ).
(h) Turn the ignition switch off.
(i) Turn the ignition switch to ON, and wait for at least 60 seconds.
(j) Check for DTCs (See page ).
OK:
DTC B1800, B1801, B1802 or B1803 is not output.
HINT:
Codes other than DTC B1800, B1801, B1802 and B1803 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Driver Side Squib |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor |
*4 |
Connector E |
*5 |
SST |
*a |
Front view of wire harness connector (to Driver Side Squib) |
*b |
Color: Orange |
OK |
REPLACE STEERING PAD |
|
2. |
CHECK CONNECTOR |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect SST from connector E.
(d) Check that the spiral cable connectors (on the steering pad side) are not damaged. OK: The lock button is not disengaged, and the claw of the lock is not deformed or damaged. Text in Illustration
|
|
NG |
REPLACE SPIRAL CABLE SUB-ASSEMBLY |
|
3. |
CHECK DRIVER SIDE SQUIB CIRCUIT |
(a) Disconnect the connectors from the center airbag sensor. |
|
(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 |
---|---|---|
Z12-2 (D+) - Body ground |
Ignition switch ON |
Below 1 V |
Z12-1 (D-) - Body ground |
Ignition switch ON |
Below 1 V |
(d) Turn the ignition switch off.
(e) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Z12-2 (D+) - Z12-1 (D-) |
Always |
Below 1 Ω |
(g) Release the activation prevention mechanism built into connector B (See page ).
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
Z12-2 (D+) - Z12-1 (D-) |
Always |
1 MΩ or higher |
Z12-2 (D+) - Body ground |
Always |
1 MΩ or higher |
Z12-1 (D-) - Body ground |
Always |
1 MΩ or higher |
*1 |
Driver Side Squib |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor |
*4 |
Connector E |
*a |
Front view of wire harness connector (to Driver Side Squib) |
*b |
Color: Orange |
NG |
GO TO STEP 5 |
|
4. |
CHECK CENTER AIRBAG SENSOR |
(a) Connect the connectors to the steering pad and center airbag sensor. |
|
(b) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(c) Turn the ignition switch to ON, and wait for at least 60 seconds.
(d) Clear the DTCs (See page ).
(e) Turn the ignition switch off.
(f) Turn the ignition switch to ON, and wait for at least 60 seconds.
(g) Check for DTCs (See page ).
OK:
DTC B1800, B1801, B1802 or B1803 is not output.
HINT:
Codes other than DTC B1800, B1801, B1802 and B1803 may be output at this time, but they are not related to this check.
Text in Illustration
*1 |
Driver Side Squib |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor |
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CENTER AIRBAG SENSOR ASSEMBLY |
5. |
CHECK INSTRUMENT PANEL WIRE (CENTER AIRBAG SENSOR - SPIRAL CABLE) |
(a) Restore the released activation prevention mechanism of connector B to its original condition. |
|
(b) Disconnect the instrument panel wire connector from the spiral cable.
(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 |
---|---|---|
F24-1 (D+) - Body ground |
Ignition switch ON |
Below 1 V |
F24-2 (D-) - Body ground |
Ignition switch ON |
Below 1 V |
(e) Turn the ignition switch off.
(f) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F24-1 (D+) - F24-2 (D-) |
Always |
Below 1 Ω |
(h) Release the activation prevention mechanism built into connector B (See page ).
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F24-1 (D+) - F24-2 (D-) |
Always |
1 MΩ or higher |
F24-1 (D+) - Body ground |
Always |
1 MΩ or higher |
F24-2 (D-) - Body ground |
Always |
1 MΩ or higher |
*1 |
Instrument Panel Wire |
*2 |
Spiral Cable |
*3 |
Center Airbag Sensor |
*4 |
Connector C |
*a |
Rear view of wire harness connector (to Spiral Cable) |
OK |
REPLACE SPIRAL CABLE SUB-ASSEMBLY |
NG |
REPLACE INSTRUMENT PANEL WIRE |
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful bec ...
Auto Down Operation does not Fully Open Power Window (Catch Protection Function
is Activated)
DESCRIPTION
If any door glass or a power window regulator motor assembly does not operate
smoothly, the catch protection function may be triggered automatically, resulting
in the auto down operation being unable to fully open the power window.
CAUTION / ...