Pinpoint Test U Second Row Left Buckle Sensor

U1 : CHECK FOR DTC U3003:16 AND U3003:17

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 U2.

U2 : RETRIEVE RCM DTCS

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. Refer to Pyrotechnic Device Health and Safety Precautions.

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

Ignition ON, engine OFF.
Carry out the RCM self-test.
Is DTC B140C:11, B140C:12, B140C:13 and B140C: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 B140C:11 or B140C:1D, Go to U3. For DTC B140C:12, Go to U5. For DTC B140C:13, Go to U6. For all others, No fault found.	This is an intermittent fault. Go to U12.

U3 : CHECK THE SECOND ROW LEFT SEATBEATBELT BUCKLE SWITCH 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.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Left Rear Seatbelt Buckle and Inflator connector disconnected.
Repower the SRS. Do not prove out the SRS at this time. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Carry out the RCM self-test.
NOTE: When viewing DTCs with the second row left seatbelt buckle switch disconnected, an open circuit fault is normally retrieved. A seatbelt inflator circuit fault is also present in the RCM, since the second row left seatbelt buckle switch shares a connector with the searbelt inflator. Does the on-demand DTC change from B140C:11 or B140C:1D to B140C:13?
Does the on-demand DTC change from B00C5:11 or B00C5:1D to B00C5:13?

Yes	No
Go to U9.	For DTC B140C:11, Go to U4. For all others, No fault found. For DTC B140C:1D, Go to U10. For all others, No fault found.

U4 : CHECK THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH 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:

(+) Left Rear Seatbelt Buckle and Inflator Correct, Harness	(-)
2ndRW_LT__SBLT_SN_FD	Ground

Are the resistances greater than 10, 000 ohms?

Yes	No
Go to U10.	REPAIR the circuit. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information. Go to U13.

U5 : CHECK THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH 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)
Left Rear Seatbelt Buckle and Inflator connector disconnected.
Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.

Measure the voltage between:

(+) Left Rear Seatbelt Buckle and Inflator Connector, Harness Side	(-)
2ndRW_LT_SBLT_SN_FD	Ground

Is any voltage present?

Yes	No
REPAIR the circuit. Go to U13.	Go to U10.

U6 : CHECK THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED)

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Left Rear Seatbelt Buckle and Inflator connector disconnected.

Connect a 5 amp fused jumper wire between the following:

Point A Left Rear Seatbelt Buckle and Inflator Connector, Harness	Point B Left Rear Seatbelt Buckle and Inflator Connector, Harness Side
2ndRW_LT_SBLT_SN_FD	SNSR_RTN Left

Repower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Ignition ON, engine OFF.
Carry out the RCM self-test.
NOTE: When viewing DTCs with the second row left seatbelt buckle switch circuits shorted together, a short to ground fault is normally retrieved. A seatbelt inflator circuit fault is also present in the RCM, since the second row left seatbelt buckle switch shares a connector with the seatbelt inflator.
Does the on-demand DTC change from B140C:13 to B140C:11?

Yes	No
REMOVE the fused jumper wire. Go to U9.	REMOVE the fused jumper wire. Go to U7.

U7 : CHECK THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH 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	(-) Left Row Seatbelt Buckle and Inflator Connector, Harness Side
2ndRW_LT_SBLT_SN_FD	2ndRW_LT_SBLT_SN_FD

Is the resistance less than 0.5 ohm?

Yes	No
Go to U8.	REPAIR the circuit. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information. Go to U13.

U8 : CHECK THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH GROUND CIRCUIT FOR AN OPEN

Measure the resistance between:

(+) Left Rear Seatbelt Buckle and Inflator Connector, Harness Side	(-) RCM_B (C310B) Connector, Harness Side
SNSR_RTN	SNSR_RTN - RR172 - Pin 53

Is the resistance less than 0.5 ohm?

Yes	No
Go to U10.	REPAIR the circuit. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information. Go to U13.

U9 : CONFIRM THE SECOND ROW LEFT SEATBELT BUCKLE SWITCH 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 electrical connectors and the 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.
Left Rear Seatbelt Buckle and Inflator 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 passenger seatbelt buckle (includes buckle switch). REFER to the appropriate SUPPLEMENTAL RESTRAINT SYSTEM article. Go to U13.	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 U12.

U10 : 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 recorded.

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 electrical connectors and the 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).
Left Rear Seatbelt Buckle and Inflator 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 U11.	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 U12.

U11 : 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.

U12 : CHECK FOR AN INTERMITTENT FAULT

Ignition OFF.
Depower the SRS. Refer to appropriate SUPPLEMENTAL RESTRAINT SYSTEM article.
Left Rear Seatbelt Buckle and Inflator connector disconnected.
Inspect:
- the connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
- the wire harness for any damage, pinched, cut or pierced wires. Repair any concerns found. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, for schematic and connector information.
- Repair any concerns found. Refer to appropriate CONNECTOR REPAIR PROCEDURES in OEM Wiring Diagrams article, 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 B140C:11, B140C:12, B140C:13 and B140C:1D retrieved on-demand 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 B140C:11 or B140C:1D, Go to U3. For DTC B140C:12, Go to U5. For DTC B140C:13, Go to U6. 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 U13.

U13 : 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.
NOTE: When selecting Restraints from the Self Test menu, DTCs are retrieved from the RCM, OCSM and, if equipped, BECM-B.
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.