Pinpoint Test Bk Third Row Center SEATBELT Buckle Sensor

BK1 : CHECK FOR DTC U3003:16 AND U3003:17

WARNING: Before beginning any service procedure in this service information, refer to Safety Warnings in appropriate GENERAL INFORMATION article. Failure to follow this instruction may result in serious personal injury.

NOTE: Diagnose all network-related (lost communication) DTCs first

Ignition ON, engine OFF.
Carry out the RCM self-test.
Is DTC U3003:16 or U3003:17 retrieved DTC during the self-test?

Yes	No
REFER to the DTC/SYMPTOM CHART .	Go to BK2.

BK2 : RETRIEVE RCM DTCS

Ignition ON, engine OFF.
Carry out the RCM self-test.
Is DTC B0057:11, B0057:12, B0057:13, and B0057:1D retrieved as an on-demand (not continuous) DTC during the self-test?

Yes	No
This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B0057:11 or B0057:1D, Go to BK3. For DTC B0057:12, Go to BK5. For DTC B0057:13, Go to BK6. For all others, No fault found.	This is an intermittent fault. Go to BK12.

BK3 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND OR CURRENT OUT OF RANGE INDICATED)

NOTE: This pinpoint test step attempts to change the fault reported by the RCM by inducing a different fault condition. If the reported fault changes, this indicates the RCM is functioning correctly and is not the source of the fault.

Ignition OFF.
Third Row Center Seatbelt Buckle Sensor connector disconnected.
Ignition ON, engine OFF.
Ignition ON, engine OFF.
NOTE: When viewing DTCs with the second row center seatbelt buckle sensor disconnected, an open circuit fault is normally retrieved.
Does the on-demand DTC change from B0057:11 or B0057:1D to B0057:13?

Yes	No
Go to BK9.	For DTC B0057:11, Go to BK4. For DTC B0057:1D, Go to BK10. For all others, No fault found.

BK4 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
RCM_A connector disconnected. (C310A)
RCM_B connector disconnected. (C310B)

Measure the resistance between:

(+) Third Row Center Seatbelt Buckle Sensor Connector, Harness Side	(-)
3rdRW_CNTR_BCKL_SN_FD	Ground

Is the resistance greater than 10, 000 ohms?

Yes	No
Go to BK10.	REPAIR the circuit. Go to BK13.

BK5 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
RCM_A connector disconnected. (C310A)
RCM_B connector disconnected. (C310B)
Third Row Center Seatbelt Buckle Sensor connector disconnected.
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Third Row Center Seatbelt Buckle Sensor Connector, Harness Side	(-)
3rdRW_CNTR_BCKL_SN_FD	Ground

Is any voltage present?

Yes	No
REPAIR the circuit. Go to BK13.	Go to BK10.

BK6 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED)

Ignition OFF.
Third Row Center Seatbelt Buckle Sensor connector disconnected.
Connect a 5 amp fused jumper wire between the following:
Ignition ON, engine OFF.
Carry out the RCM self-test.
NOTE: When viewing DTCs with the second row center seatbelt buckle sensor circuits shorted together, a short to ground fault is normally retrieved.
Does the on-demand DTC change from B0057:13 to B0057:11?

Yes	No
REMOVE the fused jumper wire. Go to BK9.	REMOVE the fused jumper wire. Go to BK7.

BK7 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR CIRCUIT FOR AN OPEN

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
RCM_A connector disconnected. (C310A)
RCM_B connector disconnected. (C310B)

Measure the resistance between:

(+) RCM_B (C310B) Connector, Harness Side	(-) Third Row Center Seatbelt Buckle Sensor Connector, Harness Side
3rdRW_CNTR_BCKL_SN_FD	3rdRW_CNTR_BCKL_SN_FD

Is the resistance less than 0.5 ohm?

Yes	No

BK8 : CHECK THE THIRD ROW CENTER SEATBELT BUCKLE SENSOR GROUND CIRCUIT FOR AN OPEN

Measure the resistance between:

(+) Third Row Center Seatbelt Buckle Sensor Connector, Harness Side	(-) RCM_B (C310B) Connector, Harness Side
SNSR_RTN	SNSR_RTN - RR172 - Pin 53

Is the resistance less than 3 ohms?

Yes	No
Go to BK10.	REPAIR the circuit. Go to BK13.

BK9 : CONFIRM THE THIRD ROW CENTER SEATBELT BUCKLE FAULT

NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs are set.

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Prior to reconnecting any previously disconnected SRS component:
- inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damaged, pinched, cut or pierced wires.
- inspect the RCM Connector Position Assurance (CPA) levers/locks for correct operation.
- repair any concerns found. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information.
Third Row Center Seatbelt Buckle Sensor connector connected. (if previously disconnected).
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Carry out the RCM self-test.
Is the original DTC retrieved on-demand during self-test?

Yes	No
INSTALL a new third row center seatbelt buckle (includes buckle sensor).. REFER to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article. Go to BK13.	In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. Go to BK12.

BK10 : CONFIRM THE RCM FAULT

NOTE: Make sure all SRS components and the RCM electrical connectors are connected before carrying out the self-test. If not, DTCs are set.

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Prior to reconnecting any previously disconnected SRS component:
- inspect connector(s) (including any inline connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damaged, pinched, cut or pierced wires.
- inspect the RCM Connector Position Assurance (CPA) levers/locks for correct operation.
- repair any concerns found. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information.
RCM_A connector connected. (C310A) (if previously disconnected).
RCM_B connector connected. (C310B) (if previously disconnected).
Third Row Center Seatbelt Buckle Sensor connector connected.
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Carry out the RCM self-test.
Is the original DTC retrieved on-demand during self-test?

Yes	No
Go to BK11.	condition has become intermittent. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. Go to BK12.

BK11 : CONFIRM THE REPAIR
- Ignition OFF.
- CHECK OASIS for any applicable TSBs
  - If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions.
  - If no TSBs address this concern, INSTALL a new RCM. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article
INSTALL a new RCM.

Reconnect all previously disconnected SRS components and repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.

Carry out the OCSM and RCM self-test and record DTCs if present. Do not clear any DTCs until all DTCs have been resolved. DIAGNOSE and REPAIR the RCM and/or OCSM DTCs.

Carry out the OCSM and RCM self-test and record DTCs if present. Do not clear any DTCs until all DTCs have been resolved.

If any SRS DTCs are retrieved, DO NOT clear any DTCs until all DTCs have been resolved. DIAGNOSE and REPAIR the RCM and/or OCSM DTCs.

If no DTCs are retrieved on-demand, the repair is complete. RETURN the vehicle to the customer.

BK12 : CHECK FOR AN INTERMITTENT FAULT

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Third Row Center Seatbelt Buckle Sensor connector disconnected.
Inspect for the following:
- inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damage, pinched, cut or pierced wires.
- inspect the RCM Connector Position Assurance (CPA) lever/locks for correct operation
- repair any concerns found. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, Connector Repair Procedures for schematic and connector information.
Connect all previously disconnected component(s)/connector(s).
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Carry out the RCM self-test.
Is DTC B0057:11, B0057:12, B0057:13 and B0057:1D retrieved on-demand during self-test?

Yes	No
This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test. For DTC B0057:11 or B0057:1D, Go to BK3. For DTC B0057:12, Go to BK5. For DTC B0057:13, Go to BK6. For all others, No fault found.	The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. Install SRS components only when directed to do so in the pinpoint test. Go to BK13.

BK13 : CHECK FOR ADDITIONAL SRS DTCS

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Reconnect all SRS components (if previously disconnected).
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Clear the RCM DTCs.
Ignition OFF.
Ignition ON, engine OFF.
Wait 10 seconds.
Carry out the RCM self-test.
If equipped with an OCSM, carry out the OCSM self-test.
Carry out the OCS self-test.
If equipped with an BECAME, carry out the BECAME self-test.
Carry out the BECAME self-test.
Are any RCM, OCSM and/or BECM-B DTCs retrieved on-demand during self-tests?

Yes	No
Do not clear any DTCs until all DTCs have been resolved. DIAGNOSE and REPAIR the RCM, OCSM or BECAME DTCs.	The repair is complete. RETURN the vehicle to the customer.