B2504
B2504 - Left Power Sliding Door Latch Cinch Ratchet Primary Switch Performance
For a complete wiring diagram, refer to
• When Monitored: Whenever the power sliding door is performing a cinching operation.
• Set Condition: When the left rear door module senses the pawl switch was detected as grounded but the ratchet primary switch is unstable, this code will set.
Test Step 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 DTCs 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, check for DTCs.
Does the scan tool display B2504 - Left Power Sliding Door Latch Cinch Ratchet Primary Switch Performance?
Yes
• Go to Test Step 2
No
• Using the wiring diagrams as a guide, inspect the wiring and connectors for an intermittent condition.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 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 for comparison.
• Especially notice the effort needed to unlatch and close the power sliding door.
• Open the door and manually close the latch. Open and close the latch manually several times and check for any sticking conditions.
Were there any mechanical problems found?
Yes
• Refer to Service information for the related symptoms.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 3
Test Step 3 - Check All Cables
• Turn the ignition OFF.
• Remove the door module assembly.
• Set the door module assembly on the vehicle floor.
• Check all cables for possible causes for sticking.
Were any cables bent, binding, pinched or sticking?
Yes
• Replace cables as necessary.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• Go to Test Step 4
Test Step 4 - Check the Power Sliding Door MUX Return Circuit for an Open
• Reconnect the C316 In - line (Wire Track) connector.
• Disconnect the left rear door latch C1 harness connector.
• Disconnect the left rear door module C2 harness connector.
• Measure the resistance of the power sliding door MUX return circuit between the left rear door module C2 harness connector and the left rear door latch C1 harness connector.
• Wiggle the harness and check for an intermittent open circuit condition.
Is the resistance less than 5.0 ohms?
Yes
• Go to Test Step 5
No
• Repair the power sliding door MUX return circuit for an open.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 5 - Check the Left Rear Door Ajar Switch Sense Circuit for an Open
• Measure the resistance of the left rear door ajar switch sense circuit between the left rear door module C2 harness connector and the left rear door latch C1 harness connector.
• Wiggle the harness and check for an intermittent open circuit condition.
Is the resistance less than 5.0 ohms?
Yes
• Go to Test Step 6
No
• Repair the left rear door ajar switch sense circuit for an open.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
Test Step 6 - Check the Left Rear Door Ajar Switch Sense Circuit for a Short to the Power Sliding Door MUX Return Circuit.
• Measure the resistance between the power sliding door MUX return circuit and the left rear door ajar switch sense circuit in the left rear door latch C1 harness connector.
• Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance less than 10k ohms?
Yes
• Repair the left rear door ajar switch sense circuit for a short to the power sliding door MUX return circuit.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior
No
• If no obvious mechanical or harness/connector problems were found, replace the left rear power sliding door latch.
• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior