Pinpoint Test

NOTE: Do not carry out this pinpoint test unless directed to do so from the Symptom Chart: Seating - Power-Fold Preliminary Inspection.

CONFIRM THE PRELIMINARY INSPECTION HAS BEEN COMPLETED
1. Perform the steps outlined in the Preliminary Inspection. REFER to Symptom Chart(s) .
Does either seat move to any position?
- Yes: If both seats operate to each selected position correctly, GO to 2 .
  If only the LH seat does not operate correctly, REFER to Diagnostic Routine A: Seat Latch Motor and Latch Switch Functional Test - LH .
  
  If only the RH seat does not operate correctly, REFER to Diagnostic Routine B: Seat Latch Motor and Latch Switch Functional Test - RH .
  
  If both seats move but neither seat correctly obtains all the selected positions, GO to 20 .
- No: GO to 3 .
CHECK THE OPERATION OF EACH SEAT SEPARATELY
1. Check the seats.
2. Select LH using the seat select button and operate the seat to each position (NORMAL, STOW and FOLD), allowing the seat to complete each selection.
3. Select RH using the seat select button and operate the seat to each position, allowing the seat to complete each selection.
Do both seats operate correctly?
- Yes: The system is operating correctly at this time. CHECK for causes of an intermittent concern such as loose, corroded or disconnected connectors or pinched or damaged wiring and REPAIR as necessary.
- No: GO to 14 .
CHECK THE BCM FOR DTCs
1. Ignition ON.
2. Using a scan tool, perform BCM self-test.
Are DTCs present?
- Yes: For DTC B1317:15, GO to 10 .
  For DTC B1317:11, GO to 12 .
  
  For any other DTCs , REFER to DTC CHART: BODY CONTROL MODULE (BCM) .
- No: GO to 4 .

CHECK FOR VOLTAGE AND GROUND TO THE PFSM

Disconnect: PFSM C4250A.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

PFSM			PFSM

C4250A			C4250A
Pin	Circuit	Measurement	Pin	Circuit
8	CBB18 (GY/OG)		10	GD149 (BK/GY)

Is the voltage greater than 11 volts?

Yes: GO to 13 .
No: GO to 5 .

CHECK THE PFSM FOR VOLTAGE

Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

PFSM			Ground

C4250A			Ground
Pin	Circuit	Measurement	Pin	Circuit
8	CBB18 (GY/OG)		-	Ground

Is the voltage greater than 11 volts?

Yes: REPAIR circuit GD149 (BK/GY) for an open.
No: GO to 6 .

CHECK THE THIRD ROW POWER SEAT RELAY FOR VOLTAGE AND GROUND

Disconnect: Third Row Power Seat Relay.
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

Third Row Power Seat Relay			Third Row Power Seat Relay

Socket			Socket
Pin	Circuit	Measurement	Pin	Circuit
2	CLN09 (YE/GN)		1	GD120 (BK/GN)

Is the voltage greater than 11 volts?

Yes: GO to 8 .
No: GO to 7 .

CHECK THE THIRD ROW POWER SEAT RELAY FOR VOLTAGE

Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

Third Row Power Seat Relay			Ground

Socket			Ground
Pin	Circuit	Measurement	Pin	Circuit
2	CLN09 (YE/GN)		-	Ground

Is the voltage greater than 11 volts?

Yes: REPAIR circuit GD120 (BK/GN) for an open.
No: REPAIR circuit CLN09 (YE/GN) for an open.

CHECK THE THIRD ROW POWER SEAT RELAY FOR VOLTAGE

Measure:

Third Row Power Seat Relay			Ground

Socket			Ground
Pin	Circuit	Measurement	Pin	Circuit
3	SBB22 (BN/RD)		-	Ground

Is the voltage greater than 11 volts?

Yes: GO to 9 .
No: VERIFY BJB fuse 22 (30A) is OK. If the fuse is OK, REPAIR the circuit. If not OK, REFER to the appropriate wiring diagrams to identify the possible causes of the circuit short. REFER to OEM FUSE AND RELAY INFORMATION and OEM WIRING DIAGRAMS .

CHECK THE CIRCUIT BETWEEN THE PFSM AND THE THIRD ROW POWER SEAT RELAY FOR AN OPEN

Ignition OFF.

Measure:

PFSM			Third Row Power Seat Relay

C4250A			Socket
Pin	Circuit	Measurement	Pin	Circuit
8	CBB18 (GY/OG)		5	CPS53 (VT/BN)

Is the resistance less than 3 ohms?

Yes: INSTALL a new third row power seat relay.
No: REPAIR the circuit.

CHECK THE PFSM ENABLE CIRCUIT FOR A SHORT TO VOLTAGE

Disconnect: PFSM C4250E.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Disconnect: BCM C2280C.
Ignition ON.

Measure:

PFSM			Ground

C4250E			Ground
Pin	Circuit	Measurement	Pin	Circuit
4	CPS58 (WH/BN)		-	Ground

Is any voltage present?

Yes: REPAIR the circuit. CLEAR the DTCs . TEST the system for normal operation.
No: GO to 11 .

CHECK THE PFSM ENABLE CIRCUIT FOR AN OPEN

Ignition OFF.
Disconnect: PFSM C4250E.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Disconnect: BCM C2280C.

Measure:

PFSM			BCM

C4250E			C2280C
Pin	Circuit	Measurement	Pin	Circuit
4	CPS58 (WH/BN)		2	CPS48 (BU)

Is the resistance less than 3 ohms?

Yes: GO to 21 .
No: REPAIR the circuit.

CHECK THE PFSM ENABLE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Disconnect: PFSM C4250E.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Disconnect: BCM C2280C.

Measure:

PFSM			Ground

C4250E			Ground
Pin	Circuit	Measurement	Pin	Circuit
4	CPS58 (WH/BN)		-	Ground

Is the resistance greater than 10, 000 ohms?

Yes: GO to 21 .
No: REPAIR the circuit.

CHECK THE PFSM ENABLE CIRCUIT FOR VOLTAGE

Disconnect: PFSM C4250E.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

PFSM			Ground

C4250E			Ground
Pin	Circuit	Measurement	Pin	Circuit
4	CPS58 (WH/BN)		-	Ground

Is the voltage greater than 11 volts?

Yes: GO to 14 .
No: GO to 21 .

CHECK FOR VOLTAGE TO THE SEAT CONTROL SWITCH

NOTE: This pinpoint test step directs testing circuits using a back-probe method. Use the special back-probe tool specified in the tool list in this article. Do not force test leads or other probes into connectors. Adequate care must be exercised to avoid connector terminal damage while making sure that good electrical contact is made with the circuit or terminal. Failure to follow these instructions may cause damage to wiring, terminals, or connectors and subsequent electrical faults. Refer to SPECIAL TOOL(S) .

Connect: PFSM C4250A (if previously disconnected).
Remove the third row seat control switch, but do not disconnect the electrical connector at this time. REFER to Seat Control Switch .
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

With all of the switch buttons at rest and seat select set to BOTH, measure:

Third Row Seat Control Switch			Ground

C3199			Ground
Pin	Circuit	Measurement	Expected Voltage
2	CPSA1 (WH/GN)		Between 7 and 12.9 volts
3	CPSB2 (GY)		Between 3.5 and 4.0 volts
4	CPSB1 (GN)		Between 3.5 and 4.0 volts

Do the voltages agree with the expected voltages in the table?

Yes: GO to 19 .
No: GO to 15 .

CHECK CIRCUITS FOR VOLTAGE WITH THE SEAT CONTROL SWITCH DISCONNECTED

Disconnect: Third Row Seat Control Switch.
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

Third Row Seat Control Switch			Ground

C3199			Ground
Pin	Circuit	Measurement	Expected Voltage
2	CPSA1 (WH/GN)		Greater than 10 volts
3	CPSB2 (GY)		Greater than 4 volts
4	CPSB1 (GN)		Greater than 4 volts

Do the voltages agree with the expected voltages in the table?

Yes: INSTALL a new third row seat control switch. REFER to Seat Control Switch .
No: GO to 16 .

CHECK THE SEAT CONTROL SWITCH CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect: PFSM C4250C.
Disconnect: PFSM C4250D.

Measure:

Third Row Seat Control Switch			Ground

C3199			Ground
Pin	Circuit	Measurement	Pin	Circuit
2	CPSA1 (WH/GN)		-	Ground
3	CPSB2 (GY)		-	Ground
4	CPSB1 (GN)		-	Ground

Is any voltage present?

Yes: REPAIR the affected circuit.
No: GO to 17 .

CHECK THE SEAT CONTROL SWITCH CIRCUITS FOR AN OPEN OR SHORT TO GROUND

Measure:

Third Row Seat Control Switch			Ground

C3199			Ground
Pin	Circuit	Measurement	Pin	Circuit
2	CPSA1 (WH/GN)		-	Ground
3	CPSB2 (GY)		-	Ground
4	CPSB1 (GN)		-	Ground

Third Row Seat Control Switch			PFSM

C3199			C4250C
Pin	Circuit	Measurement	Pin	Circuit
2	CPSA1 (WH/GN)		1	CPS48 (BU)
5	RPSB2 (BN)		4	GD149 (BK/GY)

Third Row Seat Control Switch			PFSM

C3199			C4250D
Pin	Circuit	Measurement	Pin	Circuit
3	CPSB2 (GY)		3	CPS49 (BN/GN)
4	CPSB1 (GN)		2	CPS50 (BU/BN)

Are the resistances less than 3 ohms between the seat control switch and the PFSM; and greater than 10, 000 ohms between the seat control switch and ground?

Yes: GO to 18 .
No: REPAIR the affected circuit(s).

CHECK THE SEAT CONTROL SWITCH CIRCUITS FOR A SHORT TOGETHER

Measure:

Third Row Seat Control Switch			Third Row Seat Control Switch

C3199			C3199
Pin	Circuit	Measurement	Pin	Circuit
5	RPSB2 (BN)		2	CPSA1 (WH/GN)
5	RPSB2 (BN)		3	CPSB2 (GY)
5	RPSB2 (BN)		4	CPSB1 (GN)
2	CPSA1 (WH/GN)		4	CPSB1 (GN)
3	CPSB2 (GY)		4	CPSB1 (GN)
3	CPSB2 (GY)		2	CPSA1 (WH/GN)

Are the resistances greater than 10, 000 ohms?

Yes: GO to 22 .
No: REPAIR the affected circuit.

CHECK THE VOLTAGE AT THE SEAT CONTROL SWITCH CIRCUITS

NOTE: C4250E must be disconnected or inaccurate meter measurements may be taken.

Disconnect: PFSM C4250E.
- To access the PFSM, REFER to Power-Fold Seat Module (PFSM) .
Verify the vehicle is in PARK and the liftgate is open.
Verify the courtesy lights are on. If needed, close and open any door on the vehicle.

Measure:

Third Row Seat Control Switch			Ground

C3199			Ground
Pin	Circuit	Measurement	Switch Position	Expected Voltage
2	CPSA1 (WH/GN)		LH	Between 4.2 and 8.1 volts
2	CPSA1 (WH/GN)		RH	Between 3.0 and 5.9 volts
2	CPSA1 (WH/GN)		BOTH (LH and RH)	Between 7 and 12.9 volts
3	CPSB2 (GY)		FOLD	Between 1.2 and 1.5 volts
4	CPSB1 (GN)		NORMAL	Between 1.2 and 1.5 volts
4	CPSB1 (GN)		STOW	Between 1.8 and 2.2 volts

Do the measured voltages agree with the table?

Yes: GO to 22 .
No: INSTALL a new third row seat control switch. REFER to Seat Control Switch .

CHECK THE LATCH SWITCH AND LATCH MOTOR RETURN CIRCUITS FOR AN OPEN

Disconnect: Left Seat Latch Switch.
- Gain access to the LH latch switch connector. REFER to Seat Control Switch .
Disconnect: Left Seat Latch Motor.
Disconnect: PFSM C4250A.

Measure:

PFSM			Left Seat Latch Switch

C4250A			C4241
Pin	Circuit	Measurement	Pin	Circuit
12	CPS51 (VT/GY)		2	CPS51 (VT/GY)

PFSM			Left Seat Latch Motor

C4250A			C4243
Pin	Circuit	Measurement	Pin	Circuit
6	CPS04 (YE/OG)		2	CPS04 (YE/OG)

Are the resistances less than 3 ohms?

Yes: GO to 18 .
No: REPAIR the affected circuit.

CHECK BCM CONNECTORS AND PINS FOR DAMAGE AND RETEST THE SYSTEM
1. Disconnect and inspect all BCM connectors.
2. Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins as necessary
  - pushed-out pins - install new pins as necessary
3. Reconnect all previously disconnected electrical connectors.
4. Operate the seats and determine if the concern is still present.
Is the concern still present?
- Yes: 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 BCM:
  REFER to BODY CONTROL MODULE (BCM) - WITH INTELLIGENT ACCESS (IA) , or
  
  REFER to BODY CONTROL MODULE (BCM) - WITHOUT INTELLIGENT ACCESS (IA) .
- No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
CHECK PFSM CONNECTORS AND PINS FOR DAMAGE AND RETEST THE SYSTEM
1. Disconnect and inspect all PFSM connectors.
2. Repair:
  - corrosion (install new connector or terminals - clean module pins)
  - damaged or bent pins - install new terminals/pins as necessary
  - pushed-out pins - install new pins as necessary
3. Reconnect all previously disconnected electrical connectors.
4. Operate the seats and determine if the concern is still present.
Is the concern still present?
- Yes: 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 PFSM. REFER to Power-Fold Seat Module (PFSM) .
- No: The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.