Part 1

Operation

Engine and Ignition Key Control
Description
This function managed by the IPM, controls :
- Ignition key position in the key cylinder (off, acc, run , start)
- Ignition key reminder status (inserted or not)
- Engine running status
- Charging voltage
The data are transmitted on the CAN.
Functional Diagram





Exterior Lighting

Light MF switch (Multi - Function Light switch)
Description
The MF Light switch is used to manage the park lamps, the tail lamps and the headlamps low beam.
The park lamps, the tail lamps and the headlamps low beam status are determined by:
- The light MF switch:
1) The MF light switch has 4 positions: OFF, Park and Tail, Headlamps Low Beam, Auto light.
2) It is connected to the IPM with 3 wires: Park and Tail lamp Sw, Headlamp Sw, Auto light Sw.
- The Auto light function
- The Escort function
- The Battery Saver function
The Auto light function is active when the MF Light sw is in Auto light position and depends on the ignition key position. Based on the Auto light sensor values corresponding to the exterior brightness level, it automatically manages the lighting of the park lamps, the tail lamps and the headlamps low beam. Depending on the country, these lamps are controlled either separately or together.
The IPM manages the control logic of the functions, and sends the command to the RAM and the FAM that drive the lamps.
The FAM drives the turn signal park lamps and the side marker lamps. All these lamps are controlled simultaneously. The FAM also drives the headlamps low beam and the HLLD, both in same time.
The RAM drives the tail lamps. Moreover, when the tail lamps are switched on, the license plate lamps are also lighted on.
The interior backlighting (IP backlight, switch illuminations) is managed with the same control logic as the park and tail lamps.
There is no indicator on the cluster for the park lamps, the tail lamps or the headlamps low beam.
For each of the park lamps, the tail lamps and the headlamps low beam, a status message is sent by FAM or RAM to the IPM and to CLU to indicate if one lamp is in error.
Functional Diagram





IPM
The light MF switch is connected to the IPM and is used to command the park lamps, tail lamps and the headlamps low beam.
Description
MF Light sw status definition:





The Auto light Sensor signal status value is defined thanks to the Auto light sensor value (input "Auto light sensor 5V return").
Description
Auto light Sensor signal Sts definition:






NOTE:
These values can be calibrated on the real vehicle depending on the customer's request. The calibrated values are prior to the specification.

RAM
The RAM drives the tail lamps.
Description
Tail lamps truth table:
The tail lamps are controlled depending on the Park Tail Head Lamp control value.






FAM
The FAM drives either the side marker lamps or the turn signal park lamps.
The lamps are controlled simultaneously.
Description
Park lamps truth table:
The park lamps are controlled depending on the Park Tail Head Lamp control value.





The FAM also drives the Headlamps low beam and the HLLD, both simultaneously.
Description
HLLD control:
The left and right HLLD are following the same control logic and the same requirements as the headlamps low beam.
The module drives LEFT HLLD and RIGHT HLLD.

Head Lamps High Beam
Description
The following functions activate the Headlamps High Beam:
- The High Beam switch,
- The Flash To Pass switch,
- The DRL function for Canada,
The IPM manages the control logic of the functions, and sends the command to the FAM that drives the headlamps high beam lamps. CLU has a backlight indicator for the Headlamps High Beam (not used when activated by DRL).
A status message coming from the Left and Right Head lamps High Beam is sent by FAM to the IPM and to CLU to indicate if one lamp is in error.
Functional Diagram





IPM
The high beam lever (High Beam sw and Flash To Pass sw) is connected to the IPM and is used to command the headlamps high beam.
The IPM manages the control logic of all the functions concerned with the headlamps high beam. The command of those lamps is sent to the FAM thanks to the CAN signal High Beam control.

FAM
The FAM drives the headlamps high beam depending on the High Beam Ctrl:
Description
Headlamps high beam: ON_DRL definition
The DRL function operates the Headlamps High Beam at half power. The output is 6V ± 0.2V at 12.8V of battery condition.

DRL
Description
The DRL function only operates the Headlamps High Beam.
The backlight indicator on CLU for the Headlamps High Beam is not activated by the DRL function.

Backup Lamps
Description
The backup lamps function switches on the backup lamps to indicate that the vehicle is in the reverse gear, it also switches on the backup signal output for cluster.
The CLU module sends the reverse gear status to the IPM and the RAM. The IPM drives the backup signal output for cluster and the RAM drives the backup lamps.
A status message is sent by RAM to the IPM and to CLU to indicate if one lamp is in error.
Functional Diagram





IPM
The IPM drives the Back up signal output depending on Inhibit Sw Sts and Ignition Sw state.
Description
Truth table for back up signal output:





x : Not applicable

RAM
The RAM drives the Back up lamps rear parking assist control unit depending on Inhibit switch state and Ignition switch state.

Front Fog Lamps
Description
The front fog lamps are activated thanks to a switch connected to the IPM.
The IPM manages the control logic of the front fog function, and sends the command to the FAM that drives the front fog lamps.
A status message coming from the left and right front fog lamps is sent by FAM to the IPM to indicate if one lamp is in error or not.
Functional Diagram





Battery Saver
Description
The Battery Saver function provides an automatic shut off to the Park and Tail lamps (with the license plate lamps and the Side marker lamps) and to the Front fog lamps to save the power of the Battery.
The IPM manages the control logic of the function, and sends the command to the FAM and the RAM that drives the lamps.
Functional Diagram





IPM
The following requirements describe the conditions to activate and to deactivate the battery save function.
Description
Working conditions for the battery Saver function for RKE equipped vehicle only:
The Battery Saver function is activated when Key Reminder Sw Sts is not inserted and the driver door is open (1). In this case, Battery Saver Activated is ON.
(1) Driver door open switch status is OPEN
Battery Saver activated: action of Driver door open switch status is OPEN
The battery saver is not deactivated when Driver door open switch status value changes.
Battery saver and escort function:
The battery saver function is temporary disabled when the escort function is enabled
Description
Battery Saver deactivation: intentional "park and tail ON"
When the light MF is switched OFF and then set to 'Park and Tail lamps' or 'Headlamps low beam' positions (intentional "park and tail ON"), the Battery Saver function is deactivated.
In this case, Battery Saver Activated is OFF.
Battery Saver deactivation: reset of the intentional "park and tail ON" for RKE equipped vehicle
Description
When the light MF is switched OFF then set to 'Park and Tail lamps' or 'Headlamps low beam' positions (intentional "park and tail ON"), the Battery Saver function is deactivated (Battery Saver Activated is OFF) while the Key Reminder Sw Sts is not inserted.




This time sequence diagram is true with an intentional "park and tail ON" due to 'Head Lamp low beam' switching sequence ON-> OFF-> ON : Park/Tail lamps are switched to ON.
Time sequence diagram for battery saver function
When the battery saver is activated, the IPM deactivates the park & tail lamps, and the front fog lamps.
Description
Battery saver activated: management of the park and tail lamps
When the battery saver is activated, the key is OFF. Then Park Tail Head Lamp control has the following values:





Description
Battery saver activated: management of the Front fog lamps






Escort
Description
The escort function provides an automatic lighting of the headlamps low beam, the park & tail lamps and the interior backlighting.
The IPM manages the control logic of the function, and sends the command to the FAM and the RAM that drives the lamps.
Functional Diagram





IPM
The escort function controls the head lamps low beam:
Description
Escort function activation:
If the headlamps low beams are lighted ON by the light MF switch (in position LOW BEAM or AUTO) when the ignition key switch leaves the status RUN for ACC or OFF, the escort function is activated.
In this case, the headlamps low beam and the park and tail lamps stay lighted ON.
Escort function deactivation:
The escort function goes to "Escort Disable Mode" :
30s after the driver door is closed
when the multifunction switch leaves low beam or auto position to park tail position
5 min after the driver door has been opened
5 min after IGN leaves the positions RUN to ACC or OFF and driver door remains closed
if IPM receives RKE "LOCK" LOCK command twice:
RKE LOCK -> RKE LOCK: Escort disabled
RKE LOCK -> RKE UNLOCK -> RKE LOCK: Escort disabled
The "Escort Disable Mode" is exited when Light MF switch position is set to OFF or Ignition switch is set to RUN. Then, the headlamps low beam and the park and tail lamps are managed in accordance with the functioning requirements of the Light MF switch paragraph and with the functioning requirements of the Battery Saver function.
Escort function timing charts:
Example 1:




Example 2:




Example 3:




Example 4:




Example 5:





Turn Signal and Side Repeater Lamps

FAM
Description
The turn signal lamps status is determined by:
- The left and right turn signal switches
- The hazard switch
- The crash unlock activation
- The RKE lock, unlock, tailgate unlock and panic signals
- The alarm activation
A sound relay connected to the Cluster manages the "tick" sound during the turn signal lamps activation.
The cluster has two backlight indicators: one for the left Turn Signal lamps and one for the right Turn Signal lamps.
The IPM manages the control logic of the function, and sends the command to the FAM and the RAM that drives the turn signal lamps. The same CAN signal is used for the front and the rear turn signal activation.
Functional Diagram





IPM
The IPM manages the control logic of the turn signal function. The command of the turn signal lamps is sent to the FAM and the RAM thanks to the CAN signal Turn Indicator Ctrl, whose values are defined below.
Description
Crash unlock mode:
When a crash unlock occurs, the CAN message Turn Indicator Ctrl is sent with the sequence values all on / all off at the frequency 80 (+/-5) cycles per minute (duty 50% +/-5%).
Crash unlock sequence stop:
The crash unlock flashing sequence stops when the ignition key is OFF.
Description
Hazard mode: working conditions
The Hazard lamps sequence is activated when the hazard sw input is ON in any position of Ignition Sw.
Description
Hazard mode: definition
When the Hazard lamps are activated by the Hazard button, Turn Indicator ctrl is sent with the sequence values all on / all off at the frequency (80 +/- 5) cycles per minute (duty 50% +/-5%).
Stop of the hazard mode:
The Hazard lamps sequence is stopped when the hazard sw input is off or when a higher priority sequence occurs.
Description
Priorities between the turn signal commands:
The priorities between the different commands of the turn signal lamps from the upper to the lower priority are as following:
1st: Hazard lamps ordered by the Hazard switch
2nd: Hazard lamps ordered by the Crash Unlock activation
3rd: Alarm flashing sequence
4th: RKE panic signal flashing sequence
5th: RKE lock / unlock signal flashing sequence
6th: Left or Right Turn signal lamps ordered by the turn lever switch

RAM
The RAM drives the rear left and right turn signal lamps.

FAM
The FAM drives the front left and right turn signal lamps.

Interior Lighting

Room Lamps
Description
The vehicle is equipped with Room Lamps located on the front and rear interior roof.
The lamps low sides are driven by the RAM, and the control logic depends on:
- Front and rear doors status (RAM input)
- Tailgate status
- Lock/unlock interior lamp control information depending on RKE for vehicles not equipped with
- Burglar Alarm (signal sent from IPM to RAM)
- Lock/unlock interior lamp control information depending on Burglar Alarm state for vehicles equipped with Burglar Alarm (signals sent from IPM to RAM)
- The ignition key position (managed by the IPM and signal transmitted to the RAM).
- The Main Room Lamp switch (variation dependent equipment), which is a common control for the interior light.
Local 3-state switches (ON, OFF and DOOR positions) directly wired to the lamps can also be used to manually force the Room Lamp behavior. The RAM has no feedback of the local switches positions. No diagnostic (problem detection) is done on the Room Lamps.
Functional Diagram




Description
Light Decay definition:
"Decayed OFF" corresponds to an illumination level decay of 2 +/- 0.2 seconds after door close.
Start level at door close is 75% of full illumination level (+/- 10% due to hardware dispersion), and then linear diminishing for 2 +/- 0.2 seconds with a resolution of more than 32 steps, till 0.

Luggage Lamps
Description
The vehicle is equipped with a Luggage Lamp of which the low side is driven by the RAM, and the control logic depends on:
Tailgate status (RAM input)
The ignition key position (managed by the IPM and signal transmitted to the RAM).
The Main Room Lamp switch (variation dependent equipment), which is a common control for the interior light.
No diagnostic (problem detection) is done on the Luggage Lamps.
Functional Diagram