SRS DTC Troubleshooting: 83-43

DTC 83-43: No Signal From the Front Passenger's Weight Sensor (rear outer side)

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.
	Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.
	Make sure the harness under the front passenger's seat is not pinched or interfering with other parts.

DTC Description	DTC
83-43 No signal from the front passenger's weight sensor (rear outer side)

Problem verification:

Problem verification

?1.	Clear the DTCs with the HDS.

?2.	Turn the vehicle to the ON mode, then wait for 10 seconds.

?3.

Check for DTCs with the HDS.

DTC Description	DTC
83-43 No signal from the front passenger's weight sensor (rear outer side)

Is DTC 83-43 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. If another DTC is indicated, troubleshoot the DTC.?

Open wire check (SWSP4 line):

Open wire check (SWSP4 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Disconnect the front passenger's weight sensor (rear outer side) 3P connector (A) on the front passenger's seat wire harness.

?3.	Turn the vehicle to the ON mode.

?4.

Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
Test condition	Front passenger's weight sensor (rear outer side) 3P connector (on the front passenger's seat wire harness): disconnected
Test point 1	Front passenger's weight sensor (rear outer side) 3P connector No. 1 (on the front passenger's seat wire harness)
Test point 2	Body ground

Is there about 5 V?


	YES

The SWSP4 wire is OK. Go to step 3.


	NO

Open in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.?

Shorted wire check (SWS4 line):

Shorted wire check (SWS4 line)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connector.

Front passenger's weight sensor unit connector B (6P)

?3.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test condition	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor (rear outer side) 3P connector (on the front passenger's seat wire harness): disconnected
Test point 1	Front passenger's weight sensor unit connector B (6P) No. 5
Test point 2	Body ground

Is there an open circuit, or at least 1 M??


	YES

The SWS4 wire is not shorted. Go to step 4.


	NO

Short to ground in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.?

Shorted wire check (SWS4 line to SWS4G line):

Shorted wire check (SWS4 line to SWS4G line)

?1.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
Test condition	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor (rear outer side) 3P connector (on the front passenger's seat wire harness): disconnected
Test point 1	Front passenger's weight sensor (rear outer side) 3P connector No. 2 (on the front passenger's seat wire harness)
Test point 2	Front passenger's weight sensor (rear outer side) 3P connector No. 3 (on the front passenger's seat wire harness)

Is there an open circuit, or at least 1 M??


	YES

The SWS4 and SWS4G wires are not shorted. Go to step 5.


	NO

Short to another wire in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.?

Open wire check (SWS4 lines):

Open wire check (SWS4 lines)

?1.

Measure the resistance between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor (rear outer side) 3P connector (on the front passenger's seat wire harness): disconnected
Test point 1	Front passenger's weight sensor unit connector B (6P) No. 5
Test point 2	Front passenger's weight sensor (rear outer side) 3P connector No. 2 (on the front passenger's seat wire harness)

Is there 1.0 ? or less?


	YES

Faulty front passenger's weight sensor (rear outer side); replace the front passenger's seat rail including all four front passenger's weight sensors, then clear the DTC.?


	NO

Open in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.?