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B2500







B2500-LEFT POWER SLIDING DOOR LATCH CINCH OVERCURRENT - DMLR





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Whenever the power sliding door is performing a cinching operation.

- Set Condition:
When the Left Rear Door Module senses the latch motor stall current of 6.5 amps has been detected for over 150ms, with no pawl or ratchet failure this code will set.





Diagnostic Test

1. CHECK FOR DTCS
Ensure the left power sliding door is closed and with the scan tool, run the "Latch Home Sector Test" before proceeding to ensure the latch is positioned correctly.
With the scan tool, record DTC's and any power sliding door inhibitors.
Erase the DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Attempt to operate the Left Power Sliding Door
With the scan tool, read DTCs.
Does the scan tool display this DTC?

Yes

- Go To 2

No

- Using the wiring diagrams as a guide, inspect the wiring and connectors for an intermittent condition.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

2. BINDING POWER SLIDING DOOR
Examine the power sliding door for proper alignment, worn or binding upper and lower rollers, or a loose/damaged weatherstrip.
Examine the power sliding door track assembly for wear or anything that would cause an obstruction to proper operation.
Manually operate the power sliding door on a known good vehicle and notice the effort needed to open and close the door for comparison.
Especially notice the effort needed to unlatch and cinch the power sliding door.
Were there any mechanical problems found?

Yes

- Refer to Service information for the related procedure(s).
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 3

3. CHECK THE LEFT CINCH/RELEASE MOTOR (Q47) LATCH AND (Q49) UNLATCH DRIVER CIRCUITS FOR A SHORT TO VOLTAGE




Turn the ignition off.
Remove the Door Module Assembly.
Set the Door Module Assembly on the vehicle floor.
Reconnect the C316 In-line (Wire Track) connector.
Disconnect the Left Rear Door Latch C3 (motor) connector.
Turn the ignition on.
Measure the voltage between body ground and the (Q47) Left Cinch/Release Motor Latch Driver circuit in the Left Rear Door Latch C3 harness connector.
Measure the voltage between body ground and the (Q49) Left Cinch/Release Motor Unlatch Driver circuit in the Left Rear Door Latch C3 harness connector.
Wiggle the harness and check for an intermittent short circuit condition.

NOTE: The voltage between each circuit to ground should be approximately 4.0 and 8.0 volts.

Is the voltage above 8.1 volts on either or both circuits?

Yes

- Repair the (Q47/Q49) Left Cinch/Release Motor Latch or Unlatch Driver circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 4

4. CHECK THE LEFT REAR POWER SLIDING DOOR LATCH




Connect a 12 volt test light between the (Q47) Cinch/Release Motor Latch circuit and the (Q49) Cinch/Release Motor Unlatch circuit in the C3 connector
With the scan tool, actuate the Door Latch to Open then Close several times and observe the test light.
Does the test light illuminate brightly when the latch is actuated in both directions?

Yes

- Replace the Left Rear Power Sliding Door Latch.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 5

5. CHECK THE (Q47) LEFT CINCH/RELEASE MOTOR LATCH DRIVER CIRCUIT FOR AN OPEN




Turn the ignition off.
Disconnect the Left Rear Door Module C1 harness connector.
Measure the resistance of the (Q47) Left Cinch/Release Motor Latch Driver circuit between the Left Rear Door Module C1 harness connector and the Left Rear Door Latch C3 harness connector.
Wiggle the harness and check for an intermittent open circuit condition.
Is the resistance below 5.0 ohms?

Yes

- Go To 6

No

- Repair the (Q47) Left Cinch/Release Motor Latch Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

6. CHECK THE (Q49) LEFT CINCH/RELEASE MOTOR UNLATCH DRIVER CIRCUIT FOR AN OPEN




Measure the resistance of the (Q49) Left Cinch/Release Motor Unlatch Driver circuit between the Left Rear Door Module C1 harness connector and the Left Rear Door Latch C3 harness connector.
Wiggle the harness and check for an intermittent open circuit condition.
Is the resistance below 5.0 ohms?

Yes

- Go To 7

No

- Repair the (Q49) Left Cinch/Release Motor Unlatch Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

7. CHECK THE (Q47) LEFT CINCH/RELEASE MOTOR LATCH DRIVER CIRCUIT FOR A SHORT TO GROUND




Measure the resistance between the (Z908) Ground and the (Q47) Left Cinch/Release Motor Latch Driver circuit in the Left Rear Door Module C1 harness connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (Q47) Left Cinch/Release Motor Latch Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 8

8. CHECK THE (Q49) LEFT CINCH/RELEASE MOTOR UNLATCH DRIVER CIRCUIT FOR A SHORT TO GROUND




Measure the resistance between the (Z908) Ground and the (Q49) Left Cinch/Release Motor Unlatch Driver circuit in the Left Rear Door Module C1 harness connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (Q49) Left Cinch/Release Motor Unlatch Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 9.

9. CHECK FOR (Q47) LEFT CINCH/RELEASE MOTOR LATCH DRIVER SHORT TO (Q781) POWER SLIDING DOOR MUX RETURN




Disconnect the Left Rear Door Latch C1 connector.
Measure the resistance between the (Q781) Power Sliding Door Mux Return circuit in the Left Rear Door Latch C1 connector and the (Q47) Left Cinch/Release Motor Latch Driver circuit in the Left Rear Door Latch C3 connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 1000.0 ohms?

Yes

- Repair the (Q781) Power Sliding Door Mux Return Circuit for a short to the (Q47) Left Cinch/Release Motor Latch Driver circuit.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 10

10. CHECK FOR (Q49) LEFT CINCH/RELEASE MOTOR UNLATCH DRIVER SHORT TO (Q781) POWER SLIDING DOOR MUX RETURN




Measure the resistance between the (Q781) Power Sliding Door Mux Return circuit in the Left Rear Door Latch C1 harness connector and the (Q49) Left Cinch/Release Motor Unlatch Driver circuit in the Left Rear Door Latch C3 connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 10,000.0 ohms?

Yes

- Repair the (Q781) Power Sliding Door MUX Return Circuit for a short to the (Q49) Left Cinch/Release Motor Unlatch Driver circuit.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 11

11. CHECK FOR (Q47) LEFT CINCH/RELEASE MOTOR LATCH DRIVER SHORTED TO THE (Q49) LEFT CINCH/RELEASE MOTOR UNLATCH DRIVER CIRCUIT




Measure the resistance between the (Q47) Left Cinch/Release Motor Latch Driver circuit and the (Q49) Left Cinch/Release Motor Unlatch Driver circuit in the Left Rear Door Latch C3 connector.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 10,000.0 ohms?

Yes

- Repair the (Q47) Left Cinch/Release Motor latch Driver circuit for a short to the (Q49) Left Cinch/Release Motor Unlatch Driver circuit.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Replace the Left Rear Door Latch Assembly.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

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