Honda HR-V Owners & Service Manuals

Honda HR-V: DTC Troubleshooting 81-51, 81-52, 81-53: Internal Failure of the Front Passenger's Weight Sensor Unit

Honda HR-V (2015-2021) Service Manual / Restraints / Occupant Detection System - Diagnostics / Troubleshooting / DTC Troubleshooting 81-51, 81-52, 81-53: Internal Failure of the Front Passenger's Weight Sensor Unit

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.
  • Before replacing the front passenger's weight sensor unit, check the front passenger's weight sensor unit software version with the HDS. If the software version is not the latest, update the front passenger's weight sensor unit software, and retest.

Occupant Detection System - Diagnostics

1. 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.

Occupant Detection System - Diagnostics

Is DTC 81-51, 81-52, or 81-53 indicated?

YES

The failure is duplicated. Replace the front passenger's weight sensor unit.

NO

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

DTC TROUBLESHOOTING 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.

Occupant Detection System - Diagnostics

1. 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.

Occupant Detection System - Diagnostics

Is DTC 81-54 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.

2. 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)

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

Occupant Detection System - Diagnostics

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Occupant Detection System - Diagnostics

Occupant Detection System - Diagnostics

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.

NO

The SWSP1 wire is OK. Go to step 3.

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.

Occupant Detection System - Diagnostics

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Occupant Detection System - Diagnostics

Occupant Detection System - Diagnostics

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.

NO

The SWSP2 wire is OK. Go to step 4.

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.

Occupant Detection System - Diagnostics

  1. Turn the vehicle to the ON mode.
  2. Measure the voltage between test points 1 and 2.

Occupant Detection System - Diagnostics

Occupant Detection System - Diagnostics

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.

NO

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.

    READ NEXT:

     DTC Troubleshooting 81-55: Short to Ground 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 pa

     DTC Troubleshooting 81-56: Internal Failure of the 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 pa

     DTC Troubleshooting 82-13: No Signal From the Front Passenger's Weight Sensor (Front Inner 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 pa

    SEE MORE:

     Throttle Body Removal and Installation

    Removal Do not insert your fingers into the installed throttle body when you turn the vehicle to the ON mode, or while the vehicle is in ON mode. If you do, you will seriously injure your fingers if the throttle valve is activated. NOTE: If you are replacing the throttle body, start at 1st proced

     Playing Bluetooth Audio

    Your audio system allows you to listen to music from your Bluetooth-compatible phone. This function is available when the phone is paired and connected to the vehicle's Bluetooth HandsFreeLink (HFL) system. *1: Depending on the Bluetooth device you connect, some or all of the lists may not be d

    © 2019-2023 Copyright www.hohrv2.com