Workshop Manual

9J1–27
RESTRAINT CONTROL SYSTEM
DTC 21 Driver Deployment Loop Resistance High
Step Action Yes No
1 Was the “SRS Diagnostic System Check” performed?
Go to Step 2
Go to the “SRS
Diagnostic
System Check.”
2 1. When measurements are requested in this chart use J–39200
DVM with correct terminal adapter from J–35616–A.
2. Use scan tool data list function, read and record the driver
deployment loop resistance.
Is driver deployment loop resistance more than 4.4 ohms?
Go to Step 3 Go to Chart A .
3 1. Ignition switch “OFF.”
2. Disconnect driver air bag assembly yellow 2–pin connector
located at base of steering column is seated properly.
Is the 2–pin connector connected properly?
Go to Step 4
Seat SRS coil
assembly 2–pin
connector
properly.Go to
Step 8
4 1. Disconnect and inspect the SRS coil assembly yellow 2–pin
connector located base of steering column.
2. If OK, reconnect the SRS coil assembly yellow 2–pin
connector.
3. Ignition switch “ON.”
Is DTC 21 current?
Go to Step 5
Ignition switch
“OFF.”
Go to Step 8
5 1. Ignition switch “OFF.”
2. Disconnect SRS coil and passenger air bag assembly yellow
2–pin connectors located at the base of steering column and
behind the glove box assembly.
3. Connect SRS driver / passenger load tool J–41433 and
appropriate adapter to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch “ON.”
Is DTC 21 current?
Go to Step 6 Go to Step 7
6 1. Ignition switch “OFF.”
2. There has been a increase in the total circuit resistance of the
driver deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking CKTs IB05–YEL/IB06–GRN and YEL/BLK, and
SDM connector terminal “3” and “4” to locate the root cause.
Was a fault found?
Replace SRS
harness.
Go to Step 8
Go to Chart A .
7 1. Ignition switch “OFF.”
Disconnect SRS driver / passenger load tool from SRS coil
assembly harness connector.
Connect SRS driver / passenger load tool J–41433 on the top
of steering column.
Reconnect SRS coil assembly harness connector as the base
of steering column.
Ignition switch “ON.”
Is DTC 21 current?
Ignition switch
“OFF.”
Replace SRS
COIL
ASSEMBLY.
Refer to in this
section 9J–24.
Go to
Step 8
Ignition switch
“OFF.”
Replace driver air
bag assembly.
Go to Step 8
8 Reconnect all components, ensure all component are properly
mounted.
Clear diagnostic trouble codes.
Was this step finished?
Repeat the “SRS
Diagnostic
System Check.”
Go to Step 8 .