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• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Door Lock Security Relay Control | B3930 02 | 1 | 1 | -- |
Left Rear Door Latch Control | B3125 02, B3130 02, B3135 02 | 1 | 1 | -- |
Right Rear Door Latch Control | B3125 02, B3130 02, B3135 02 | 1 | 1 | -- |
Under-bonnet Fuse Block Ground | -- | 1 | -- | -- |
1. Child Door Lockout Malfunction |
The child door lockout switch is on the driver door lock/window switch and controls the child locks on the rear doors as well as the rear window switches. When the BCM receives a command from the window lockout switch, it will apply voltage to the door lock security relay coil, this will energise the relay and the contact within the relay will then direct the voltage to lock the left rear and right rear child locks and then isolate them from the normal door lock system to prevent the rear doors from being opened by using the interior rear door handles.
Door Lock/Indicator Schematics
Power Door Locks Description and Operation
Control Module References for scan tool information
⇒ | If the value is always Inactive or always Active, replace the S79D window switch-driver. |
⇒ | If either rear door does not LOCK or UNLOCK, refer to Power Door Locks Malfunction . |
⇒ | If both interior rear door handles continue to function, refer to Child Security Door Lockout Inoperative. |
⇒ | If the left or right interior rear door handles continue to function, refer to Child Security Door Lockout Malfunction. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM. |
• | A23LR door latch assembly-left rear terminal 8 |
• | A23RR door latch assembly-right rear terminal 3 |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
• | A23LR door latch assembly-left rear terminal 9 |
• | A23RR door latch assembly-right rear terminal 4 |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM. |
• | A23LR door latch assembly-left rear terminal 7 and terminal 4 |
• | A23RR door latch assembly-right rear terminal 2 and terminal 9 |
⇒ | If the test lamp is always OFF, test either control circuit for an open/high resistance between the connector and the circuit splice. |
⇒ | If it does not perform as specified, replace the A23 door latch assembly-rear. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, programming and setup |
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