Pinpoint Test C: Door Latching And Locking Function Test

1. Remove the door trim panel as necessary
2. Disconnect harness from latch, check for corrosion or damage to both connectors at socket points and pins. Re-connect harness ensuring robust assembly when all parts confirmed to be in good order. If harness or latch connectors are damaged, install new harness/latch as necessary. Test the system for normal operation

Check for normal operation, does latch function correctly?

• Yes  : Re-assemble door trim and test for normal operation
• No  : GO to  C2.

1. Close all vehicle doors apart from door being investigated, please note which door, left side or right side is under investigation
2. Disconnect harness from latch to enable access to socket points to carryout conductivity testing as detailed
3. Monitor the circuit for momentary power when locking the vehicle via the key-fob or smart key between terminals 5 and 7 left side  or 5 and 7 right side 

Is there momentary power (for approx 8 seconds) between terminals 5 and 7 left side  or 5 and 7 right side  when locking the vehicle via the key-fob or smart key

• Yes  : The vehicle electrical system is locking correctly, providing the signal to the latch GO to  C3.
• No  : Refer to the applicable SYSTEM WIRING DIAGRAM(S) and investigate why vehicle electrical system is not providing signals to the latch. Using the manufacturer approved diagnostic system check for logged DTCs to localize the fault

1. Monitor the circuit for momentary power when unlocking the vehicle via the key-fob or smart key between terminals 5 and 7 left side  or 5 and 7 right side 

Is there momentary power (for approx 8 seconds) between terminals 5 and 7 left side  and 5 and 7 right side  when unlocking the vehicle via the key-fob or smart key?

• Yes  : The vehicle electrical system is unlocking correctly, providing the signal to the latch GO to  C4.
• No  : Refer to the applicable SYSTEM WIRING DIAGRAM(S) and investigate why vehicle electrical system is not providing signals to the latch. Using the manufacturer approved diagnostic system check for logged DTCs to localize the fault

1. Remove latch module from door
2. Inspect latch module for any visual damage
3. With the latch in hand, connect the electrical connector(s) to connect door latch to door harness
   NOTE: THE LATCH IS NOW READY TO TEST
4. Close all vehicle doors except the door being investigated
   NOTE:

   • Figure 1 - Unlatched position shown
   • Figure 2 - First safety latched position shown
   • Figure 3 - Fully latched position shown
   • Test will not work if latch is only in first safety latch position
5. Rotate latch claw (using a small screw driver or similar), to the fully latched position (figure 3)
   NOTE: Unlocked position shown
6. Confirm that the latch interior release lever is in the unlocked position as shown
   NOTE: Locked position shown
7. Press the lock button on the key-fob or smart key

Does the latch interior release lever move from the unlocked position to the locked position?

• Yes  : GO to  C5.
• No  : If this is a repeat test and the vehicle electrical test section has been completed and confirmed that vehicle is working correctly, then replace the door latch. If replacing latch as part of a warranty claim, please quote reference code LKINOP  in the technician comments section of the warranty claim

1. With the latch in the locked state (i.e. the latch interior release lever is in the locked position), press the key-fob or smart key unlock  button

Does the latch interior release lever move from the locked position to the unlocked position?

• Yes  : GO to  C6.
• No  : If this is a repeat test and the vehicle electrical test section has been completed and confirmed that vehicle is working correctly, then replace the door latch. If replacing latch as part of a warranty claim, please quote reference code LKINOP  in the technician comments section of the warranty claim

1. With the latch in its unlocked state, push the latch exterior release lever against its return spring, whilst simultaneously applying a light pressure to release the latch claw using a small screw driver or similar

Does the latch claw release?

• Yes  : GO to  C7.
• No  : Repeat tests C5  and C6  to confirm the fault GO to  C5. If the repeat test has confirmed that the exterior release lever will not release the claw on an unlocked latch replace the door latch. If replacing latch as part of a warranty claim, please quote reference code EXTINOP  in the technician comments section of the warranty claim

1. Using a small screw driver or similar, rotate latch claw to the second fully latched position
   NOTE: Figure A - Child lock off position shown
2. If testing a rear door latch, ensure that the child lock is turned to the off position
   NOTE: Unlocked position shown
3. Confirm that the latch interior release lever is in the unlocked position as shown
4. Whilst the latch is still in its unlocked state, push the latch interior release lever against its return spring, whilst simultaneously applying a light pressure to release the latch claw using a small screw driver or similar

Does the latch claw release?

• Yes  : Latch has passed all tests to confirm its correct function. DO NOT REPLACE LATCH  as part of any attempts to resolve any locking functionality issues
• No  : Repeat test GO to  C7. If repeat test has confirmed that the interior release lever will not release the claw when the latch is in the unlocked state, then replace the latch. If replacing latch as part of a warranty claim, please quote reference code INTINOP  in the technician comments section of the warranty claim