Passenger occupant detection system

Tiny
CDABBS21
  • MEMBER
  • 2014 HYUNDAI ACCENT
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 111,000 MILES
I was told that the sender under the passenger seat went bad. Quoted an outrageous amount to fix. My question is, if the weight detection sensor is bad will the air bags still deploy?
Thursday, June 20th, 2019 AT 2:35 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Welcome to 2CarPros.

If it doesn't recognize a person in the seat, it will not actuate the airbag on that side. Here is the description of operation.

Description

In order to make normal activation of airbag system, SRSCM detects DTC(s) for the Passive occupant detection system (PODS-F). If the seat is occupied, PODS-F detects passenger presences status and send signal to SRSCM via CAN.
SRSCM recognizes the signal as 2(two) different classifications; that is, 1(Empty or small occupant with child restraint system), 2(Occupied with large occupant and small occupant).
With these signal, ACU determines whether it needs to deploy PAB(Passenger Airbag) or not.

Let me know if that helps.

Joe
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Thursday, June 20th, 2019 AT 7:58 PM
Tiny
CDABBS21
  • MEMBER
  • 4 POSTS
That was helpful thank you. Does that just go for the airbag directly in front on the passenger? I was told, not sure if it was true, that because the sensor was bad no airbag in the entire car would deploy. Driver side, side curtain on both side etc.
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Friday, June 21st, 2019 AT 3:11 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Welcome back:

If you have the main air bag light staying on, the system will not work. I can provide directions if you want to try the repair yourself. The only thing is you will need an upper level scan tool to communicate with the vehicle. However, if you at least want to see how it is done, here are the directions. The attached pictures correlate with the directions.

________________________

PASSIVE OCCUPANT DETECTION SYSTEM (PODS-F) - REPAIR PROCEDURES

Removal

PODS-F ECU
1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2. Remove the front passenger seat assembly.

3. Remove the seat cushion cover assembly.

4. Remove the seat track assembly.

PODS-F Mat
1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2. Remove the front passenger seat assembly.

3. Remove the seat cushion assembly.

Installation

PODS-F ECU
1. Install the PODS-F ECU equipped seat track assembly.

2. Install the seat cushion cover assembly.

3. Install the front passenger seat assembly.

4. Reconnect the battery negative cable.
5. After installing the PODS-F, confirm proper system operation :
A. Turn the ignition switch ON the SRS indicator should be turned on for about six seconds and then go off.
B. Telltale lamp will turn on for 4 seconds and be turned off for 3 seconds. After the 7 seconds, it shall remain off if the PODS-F does not require suppression and the passenger airbag is enabled.

NOTE:
Be sure to perform PODS-F reset with GDS after replacing PODS-F equipped seat cushion.

PODS-F Mat
1. Install the PODS-F Mat equipped seat cushion assembly.

2. Install the front passenger seat assembly.

3. Reconnect the battery negative cable.
4. After installing the PODS-F, confirm proper system operation :
A. Turn the ignition switch ON the SRS indicator should be turned on for about six seconds and then go off.
B. Telltale lamp will turn on for 4 seconds and be turned off for 3 seconds. After the 7 seconds, it shall remain off if the PODS-F does not require suppression and the passenger airbag is enabled.

NOTE:
Be sure to perform PODS-F zeroing with GDS after replacing PODS-F equipped seat cushion.

PODS-F Zeroing procedure

You should perform PODS-F Re-zero procedure after service or replacement about all part of the passenger seat. (Not included full seat assembly)

1. Ignition "OFF", connect GDS.
2. Ignition "ON" & Engine "OFF", select Airbag system and "PODS-F Reset" mode.

Pic 1

3. The GDS will show the two PODS-F Zeroing function steps.
(1)Erase PODS-F diagnostic codes.
(2)PODS-F initialization.

Pic 2

CAUTION:
This step must be done PODS-F re-zero, when the front passenger seat is empty.

4. The PODS-F initialization procedure will be performed.

Pic 3

pic 4

CAUTION:
Erase the SRSCM diagnostic codes after completing the PODS-F zeroing.

NOTE:
In case of zeroing failure
- Code 01 : Requestor ID out of range.
- Code 02 : ECU faults.
- Code 03 : ODS sensor short to ground.
- Code 04 : Open between ODS ECU and mat.
- Code 05 : ODS ECU has not been trimmed.
- Code 06 : Configuration disabled in ECU calibration.
- Code 07 : Configuration value out of range.
- Code 08 : Used in zero Request response only.
- Code 09 : Algo enabled this ignition cycles.
- Code 0A : Upper offset value created during the zero process.
- Code 0B : Lower offset value created during the zero process.
- Code 0C : Voltage diagnostic
- Code 0D : The delta of QX_Freq_Low and QX_Freq_High must remain low.
- Code 0E : Temperature is above O deg C during the zero process.
- Code 0F : Re-read QFinal compare delta limit. (Zero verify)

____________________________________

I hope this helps. Let me know if you have other questions. The last pic I attached shows the actual part that is bad.

Take care,
Joe
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Friday, June 21st, 2019 AT 7:58 PM

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