DTC 81-54 (2014 2015 2016)

DTC 81-54 : Short to Power in the Front Passenger's Weight Sensor Power Circuit

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 .

DTC Description	DTC
81-54 Short to power in the front passenger's weight sensor power circuit

DTC (SWS)

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
81-54 Short to power in the front passenger's weight sensor power circuit

Is DTC 81-54 indicated?

YES

The failure is duplicated. Go to step 2.

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.

Shorted wire check (SWSP1 line to power)

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

- 2. Disconnect the following connectors.

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

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

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

- 3. Disconnect the front passenger's weight sensor (front inner side) 3P connector (A) on the front passenger's seat wire harness.

Courtesy of HONDA, U.S.A., INC.

- 4. Turn the vehicle to the ON mode.

- 5. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Front passenger's weight sensor unit connector A (6P): disconnected
	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor unit connector C (6P): disconnected
	Front passenger's weight sensor (front inner side) 3P connector (on the front passenger's seat wire harness): disconnected
Test circuit	SWSP1
Test point 1	Front passenger's weight sensor (front inner side) 3P connector No. 1 (LT BLU) (on the front passenger's seat wire harness)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there about 5 V or more?

YES

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

The SWSP1 wire is OK. Go to step 3.

Shorted wire check (SWSP2 line to power)

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

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

Courtesy of HONDA, U.S.A., INC.

- 3. Turn the vehicle to the ON mode.

- 4. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Front passenger's weight sensor unit connector A (6P): disconnected
	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor unit connector C (6P): disconnected
	Front passenger's weight sensor (front inner side) 3P connector (on the front passenger's seat wire harness): disconnected
	Front passenger's weight sensor (rear inner side) 3P connector (on the front passenger's seat wire harness): disconnected
Test circuit	SWSP2

Test point 1	Front passenger's weight sensor (rear inner side) 3P connector No. 1 (BLK) (on the front passenger's seat wire harness)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there about 5 V or more?

YES

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

The SWSP2 wire is OK. Go to step 4.

Shorted wire check (SWSP3 line to power)

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

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

Courtesy of HONDA, U.S.A., INC.

- 3. Turn the vehicle to the ON mode.

- 4. Measure the voltage between test points 1 and 2.

Test condition	Vehicle ON mode
	Front passenger's weight sensor unit connector A (6P): disconnected
	Front passenger's weight sensor unit connector B (6P): disconnected
	Front passenger's weight sensor unit connector C (6P): disconnected
	Front passenger's weight sensor (front inner side) 3P connector (on the front passenger's seat wire harness): disconnected
	Front passenger's weight sensor (rear inner side) 3P connector (on the front passenger's seat wire harness): disconnected
	Front passenger's weight sensor (front outer side) 3P connector (on the front passenger's seat wire harness): disconnected
Test circuit	SWSP3
Test point 1	Front passenger's weight sensor (front outer side) 3P connector No. 1 (BLK) (on the front passenger's seat wire harness)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there about 5 V or more?

YES

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

The SWSP3 wire is OK. Short to power in the front passenger's seat wire harness; replace the front passenger's seat wire harness, then clear the DTC.