Central Door Locking Operation
Inertia switch
When the inertia switch contact is closed (switch not tripped) the feed from fuse 13 in the engine compartment fusebox passes through the switch and is connected on a WG wire to the engine compartment fusebox. The feed passes through the fusebox and is connected on an NS wire to the Intelligent Driver Module (IDM) in the passenger compartment fusebox.
Body Control Unit (BCU)
The BCU is connected from pin C0661-1 on an 5K wire (serial data bus) via header C0293/C0292 RHD to the passenger compartment fusebox. The BCU uses the serial data bus to the IDM in the passenger compartment fusebox to energize each electronic relay. When each relay is energized power is supplied to each door lock motor as applicable. When each relay is de-energized it is connected to earth.
The BCU is connected using the serial data bus from pin C0661-1 on an 5K wire, via header C0293 LHD/C0292 RHD, to the instrument pack pin C0233-16. The instrument pack pin C0230-16 is connected via header C0290 (and splice joint A87 on automatic vehicles) to the SLABS ECU pin C0504-3.
The SLABS ECU supplies a road speed signal to the instrument pack.
The BCU receives the road speed signal from the instrument pack via the serial data bus to BCU pin C0661-1. The BCU uses the speed signal to enable the speed related locking when the road speed exceeds 4 mph (7 km/h).
The BCU is connected on a B wire from pin C0660-11 to earth header C0551.
The BCU is connected on a US wire from pin C0660-22 to the LH or RH door lock motor switch. This connection provides an earth signal which informs the BCU that CDL lock using the vehicle key has been requested.
The BCU is connected on a UG wire from pin C0660-5 to the LH or RH door lock motor switch. This connection provides an earth signal which informs the BCU that superlock using the vehicle key has been requested. The door lock motor switch is connected on a B wire, via header C0288 (LHD only), to earth header C0017 LHD/C0018 RHD.
Passive coil
The passive coil receives a supply from fuse 20 in the passenger compartment fusebox on a GU wire The passive coil is connected on an SR wire to BCU pin C0561-18. When applicable the BCU supplies an earth on this wire to energize the passive coil.
The passive coil is connected on a B wire, via header C0286 LHD/C0288 RHD, to earth header C0018 LHD/C0017 RHD.
Radio frequency (RF) receiver
The RF receiver is connected on a PS wire to pin C0661-5 on the BCU. This connection provides the power supply to the RF receiver.
A BN wire is connected from BCU pin C0661-6 to the RF receiver. This connection provides an RF signal to the BCU when the remote handset is operated.
The RF receiver is connected on a B wire to earth header C0707.
CDL switch
The CDL switch is connected on a KR wire to BCU pin C0660-16. This connection provides an earth input to the BCU to signal that the lock has been requested from the CDL switch.
A second connection from the CDL switch on a YK wire to BCU pin C0662-7 provides an earth input to the BCU to signal that unlock has been requested from the CDL switch.
The CDL switch is connected on a B wire via headers C0725 and C0760, to earth header C0017 LHD/C0018 RHD.
Diagnostic socket
The BCU is connected on a K wire from pin C0661-4 to the diagnostic socket pin C0040-7.
CDL Motor Operation
The electronic relays in the passenger compartment fusebox supply power feeds or earth paths for each door lock motor as necessary. Each door lock motor is connected to the passenger compartment fusebox as follows:
Front LH/RH (driver's) door lock motor
An O wire is connected from the fusebox to the LH/RH front CDL motor.
A KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the LH/RH front superlock motor and the LH/RH front CDL motor.
A KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH/RH front superlock motor.
Front LH/RH (Passenger) door lock motor
A KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD, to connector interface C0464-5/C0733-5. From the interface an O wire connects to the LH/RH front CDL motor.
A KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the LH/RH front superlock motor and the LH/RH front CDL motor.
A KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH/RH front superlock motor.
LH rear passenger door lock motor
A KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD and header C0761 to connector interface C0651-2/C0805-2. From the interface a KP wire connects to the LH rear CDL motor.
A KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to connector interface C0651-1/C0805-1. From the interface an O wire connects to the LH rear superlock motor and the LH rear CDL motor.
A KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the LH rear superlock motor.
RH rear passenger door lock motor
A KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD and header C0761 to connector interface C0777-2/C0805-2. From the interface a KP wire connects to the RH rear CDL motor.
A KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD to connector interface C0777-1/C0805-1. From the interface an O wire connects to the RH rear CDL motor and the RH rear superlock motor.
A KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the RH rear superlock motor.
Tail door lock motor
A KR wire is connected from the fusebox, via header C0292 LHD/C0290 RHD, to the tail door CDL motor.
A KP wire is connected from the fusebox, via header C0292 LHD/C0291 RHD, to the tail door CDL motor and the tail door superlock motor.
A KS wire is connected from the fusebox, via header C0292 LHD/C0285 RHD, to the tail door superlock motor.