83-21

Control System DTCs

SRS DTC Troubleshooting: 83-21

DTC 83-21 : No Signal From the Outer Side Front Passenger's Weight Sensor

NOTE:
* Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
* Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair and General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.
* These SWS DTCs are cleared when you turn the ignition switch to LOCK (0).

1. Problem verification:

Problem verification
-1. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-2. Turn the ignition switch to ON (II), then wait for 10 seconds.

-3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 83-21 indicated?
-YES- The failure is duplicated. Go to step 2.
-NO- Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.

2. SWS DTC check:

SWS DTC check
-1. From the HDS Main Menu, select SRS, then Inspection. In the Inspection Menu, select SWS DTC CHECK.

Is an SWS DTC also indicated?
-SWS DTC 21-11- Short to power in the front passenger's weight sensor (outer side) power circuit. Go to step 3.
-SWS DTC 21-12- Short to ground in the front passenger's weight sensor (outer side) power circuit. Go to step 4.

3. Front passenger's weight sensor check:

Front passenger's weight sensor check
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the front passenger's weight sensor (outer side) 2P connector (A) on the front passenger's seat wire harness.





-3. Turn the ignition switch to ON (II).

-4. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-5. Turn the ignition switch to ON (II), then wait for 10 seconds.

-6. From the HDS Main Menu, select SRS, then Inspection. In the Inspection Menu, select SWS DTC CHECK.

Is SWS DTC 21-11 indicated?
-YES- Short to power in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC, and retest. If the DTC is still present, replace the ODS unit Service and Repair.
-NO- Faulty front passenger's weight sensor (outer side); replace the front passenger's seat frame/front passenger's weight sensors as an assembly , then clear the DTC.

4. Front passenger's weight sensor check:

Front passenger's weight sensor check
-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the front passenger's weight sensor (outer side) 2P connector (A) on the front passenger's seat wire harness.





-3. Turn the ignition switch to ON (II).

-4. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-5. Turn the ignition switch to ON (II), then wait for 10 seconds.

-6. From the HDS Main Menu, select SRS, then Inspection. In the Inspection Menu, select SWS DTC CHECK.

Is SWS DTC 21-12 indicated?
-YES- Go to step 5.
-NO- Faulty front passenger's weight sensor (outer side); replace the front passenger's seat frame/front passenger's weight sensors as an assembly , then clear the DTC.

5. Shorted wire check (POW-OUT SWS line):

Shorted wire check (POW-OUT SWS line)
-1. Turn the ignition switch to LOCK (0).

-2. Measure the resistance between test points 1 and 2.









Is there an open circuit, or at least 1 MOhms?
-YES- Faulty ODS unit; replace the ODS unit Service and Repair, then clear the DTC.
-NO- Short to ground in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.