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10B-28 AIR BAG SYSTEM
DIAGNOSTIC FLOW TABLE
DTC B1021:
Step
1
1) With ignition switch OFF, disconnect contact coil con-
nector "G51" behind steering wheel.
2) Check proper connection to contact coil at terminals
in "G51" connector.
3) If OK, then connect Special Tool (B) and (C) to con-
tact coil connector "G51" disconnected at step 1).
With ignition switch ON, is DTC B1021 current?
2
1) With ignition switch OFF, disconnect SDM connector
"L21".
2) Check proper connection to SDM at terminals "L21-
27" and "L21-26".
3) If OK, then measure resistance between "L21-27" and
"L21-26" terminals with Special Tool (B) connected.
Is resistance 3.4 Ω or less?
3
1) With ignition switch OFF, disconnect Special Tool (B)
and (C) then reconnect contact coil connector "L71".
2) Remove driver air bag (inflator) module from steering
wheel (Refer to "Driver Air Bag (Inflator) Module
Removal and Installation" in Section 3C).
3) Check proper connection to driver air bag (inflator)
module at terminals in driver air bag (inflator) module
connector.
4) If OK, then connect Special Tool (B) and (C) to driver
air bag (inflator) module connector.
With ignition switch ON, is DTC B1021 current?
[A]: Fig. for STEP 1 and 2
Special tool
(A): 09932-76010
(B): 09932-75010
(C): 09932-78310
NOTE:
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components, ensure all components are properly mounted.
• Clear diagnostic trouble codes (Refer to "Diagnostic Trouble Code (DTC) Clearance"), if any.
• Repeat "Air Bag Diagnostic System Check" to confirm that the trouble has been corrected.
Action
[B]: Fig. for STEP 2
[C]: Fig. for STEP 3
Yes
Go to step 2.
Go to step 3.
Substitute a known-
Repair high resis-
good SDM and
tance or open in
recheck.
"GRN/RED" or "GRN"
wire circuit.
Ignition switch OFF.
Ignition switch OFF.
Replace contact coil
Replace driver air
assembly (Refer to
bag (inflator) module
"Contact Coil Cable
(Refer to "Driver Air
Assembly Removal
Bag (Inflator) Module
and Installation" in
Removal and Installa-
Section 3C).
tion" in Section 3C).
No
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