Toyota Tundra (2015 year). Manual — part 2995
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000002NNA08MX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/21,B1625/22; Driver Side - Side Airbag
Sensor Circuit Malfunction; 2015 MY Tundra [08/2014 - ]
DTC
B1620/21 Driver Side - Side Airbag Sensor Circuit Malfunction
DTC
B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction
DESCRIPTION
If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS
should be activated.
DTC B1620/21 or B1625/22 is recorded when a malfunction is detected in the side airbag sensor LH or RH circuit.
DTC CODE
DETECTION CONDITION
TROUBLE AREA
B1620/21
Center airbag sensor malfunction
Side airbag sensor LH
Center airbag sensor assembly
B1625/22
Center airbag sensor malfunction
Side airbag sensor RH
Center airbag sensor assembly
WIRING DIAGRAM
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/...
INSPECTION PROCEDURE
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the
negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative
(-) battery terminal notices before proceeding with work
.
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 ignition switch off.
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Clear the DTCs stored in the memory
.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Check for DTCs
.
Result
RESULT
PROCEED TO
DTC B1620 and B1625 are not output
A
DTC B1620 is output
B
DTC B1625 is output
C
A
USE SIMULATION METHOD TO CHECK
B
GO TO STEP 6
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/...
C
OK
OK
2.
CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor and side airbag
sensor RH.
OK:
The connectors are properly connected.
NG
CONNECT CONNECTORS PROPERLY
3.
CHECK CONNECTORS
(a) Disconnect the connectors from the center airbag sensor and side airbag sensor RH.
(b) Check that the connectors (on the center airbag sensor side and side airbag sensor RH side) are
not damaged.
OK:
The connectors are not deformed or damaged.
NG
REPLACE NO. 2 FLOOR WIRE
4.
CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH)
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/...
(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
TESTER CONNECTION
SWITCH CONDITION
SPECIFIED CONDITION
Q14-1 (BBR-) - Body ground
Ignition switch ON
Below 1 V
Q14-2 (BBR+) - Body ground
(d) Turn the ignition switch off.
(e) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Q14-1 (BBR-) - Q14-2 (BBR+)
Always
Below 1 Ω
(h) Disconnect the service wire from connector B.
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
Q14-1 (BBR-) - Q4-2 (BBR+)
Always
1 MΩ or higher
Q14-1 (BBR-) - Body ground
Q14-2 (BBR+) - Body ground
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1620/...
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