Reading off input and output signals

This function can be used to continuously read off the values and status of the rear electronic module (REM) input and output signals.

The following parameters can be read off:

• status of the locking relay and unlocking relay for the left rear door
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the locking relay and unlocking relay for the right rear door
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the relay for the rear folding head restraint
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• the status of the trunk lid pop-up relay (4 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the locking relay and unlocking relay for the fuel tank filler cover
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the rear fog lamp relay
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the rear fog lamp relay, German version and trailer
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the back-up lamp relay
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the rear windshield heating relay
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• power supply from the rear electronic module (REM)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• fuel level, left and right tank halves
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• input signal from the pressure sensor (CNG), Full (200bar): 4.5V Empty (0 bar): 0.5V)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• input signal from the temperature sensor (CNG) (5V - 0.5V) (0°C~4.5V, 25°C~3.6V)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• lamp fault. Indicates whether any bulb has blown. Parking lamp groups 1 and 2, cover the left and right rear parking lamps.
  NOTE:

  On early S80 models parking lamp groups 1 and 2 correspond to the inner and outer lamps.

  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• the power supply to the inclination sensor module (ISM) (low, high). High when the car is alarmed, otherwise low
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• Inclination sensor module (ISM), alarm status. Indicates whether the inclination sensor module (ISM) has deployed the alarm
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• Inclination sensor module (ISM), x/y status. Indicates whether the inclination sensor module (ISM) has deployed first in the X or Y axis
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• the status of the trunk lid handle, (pop up, no action) (4 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• current, bulb failure warning sensor group 1 (left rear parking lamps). The rear electronic module (REM) detects lamp faults when the current is below 0.6A (4 doors) / 0.45A (5 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• current, bulb failure warning sensor group 2 (right rear parking lamps). The rear electronic module (REM) detects lamp faults when the current is below 0.6A (4 doors) / 0.45A (5 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• current, lamp fault rear fog lamp. The rear electronic module (REM) detects lamp faults when the current is below 1.5A
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• Central electronic module (CEM) driver brake (off, on). Checks the input signal from the stop lamp driver from the central electronic module (CEM) to the rear electronic module (REM)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• stop lamp check (lamp on, lamp off). Checks whether the rear electronic module (REM) transmits a signal to activate the stop lamp relay
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• current, lamp fault, stop lamp. The rear electronic module (REM) detects lamp faults when the current is below 3.0 A
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the relay for the tailgate wiper. Controls starting and stopping the tailgate wiper (5 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status of the relay for extended X-supply. Controls the power supply to the tailgate wiper (5 doors)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status relay warming up diesel filter (Diesel)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status relay 15I in the power supply
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status relay gas tank valve (Bi-fuel)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status relay rear A/C (XC90)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• cargo compartment lighting output signal (0W - 10W)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• position sensor input signal for the headlamp beam height control (1.7V -3.2V)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• calibration status of the position sensor for headlamp beam height control
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• status seat belt reminder passenger (off/on)
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• input signal anode/cathode for seat belt reminder.
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• Back-up (reverse) gear status. The parameter indicates whether the rear electronic module (REM) receives a signal indicating that the gear selector lever is in the back-up (R) position
  • Engaged = The gear selector lever is in the back-up (R) position
  • Disengaged = The gear selector lever is not in the back-up (R) position.
• Status, parking assistance rear. The parameter indicates whether the rear electronic module (REM) detects that the rear parking assistance system is active or not
  • On = The rear parking assistance system is active
  • Off = The rear parking assistance system is not active.
• Status, Distance behind. The parameter indicates the distance to a detectable object. The value of the parameter is transmitted by the rear electronic module (REM) on the controller area network (CAN). The distance is presented as a digit between 1 and 32
  • 1 = the distance from the rear bumper to the detectable object is approximately 1.5 m or greater
  • 2 to 31 = the distance to the detectable object is between approximately 1.5 m and approximately 0.3 m
  • 32 = the distance from the rear bumper to the detectable object is approximately 0.3 m or less.
• Status, back-up warning sensor 1-4. The parameter indicates whether the rear electronic module (REM) receives a status signal form the parking assistance module (PAM). This signal indicates whether there is a fault in the sensors or there terminals
  • Faulty = there is a fault in the back-up warning sensor or its terminals
  • OK = there is no fault in the back-up warning sensor or its terminals.

This function can be used to continuously read off the values and status of the rear electronic module (REM) input and output signals.

The following parameters can be read off:

• status of the locking relay and unlocking relay for the left rear door
• status of the locking relay and unlocking relay for the right rear door
• status of the relay for the rear folding head restraint
• the status of the trunk lid pop-up relay (4 doors)
• status of the locking relay and unlocking relay for the fuel tank filler cover
• status of the rear fog lamp relay
• status of the rear fog lamp relay, German version and trailer
• status of the back-up lamp relay
• status of the rear windshield heating relay
• power supply from the rear electronic module (REM)
• fuel level, left and right tank halves
• input signal from the pressure sensor (CNG), Full (200bar): 4.5V Empty (0 bar): 0.5V)
• input signal from the temperature sensor (CNG) (5V - 0.5V) (0°C~4.5V, 25°C~3.6V)
• lamp fault. Indicates whether any bulb has blown. Parking lamp groups 1 and 2, cover the left and right rear parking lamps.
  NOTE:

  On early S80 models parking lamp groups 1 and 2 correspond to the inner and outer lamps.

• the power supply to the inclination sensor module (ISM) (low, high). High when the car is alarmed, otherwise low
• Inclination sensor module (ISM), alarm status. Indicates whether the inclination sensor module (ISM) has deployed the alarm
• Inclination sensor module (ISM), x/y status. Indicates whether the inclination sensor module (ISM) has deployed first in the X or Y axis
• the status of the trunk lid handle, (pop up, no action) (4 doors)
• current, bulb failure warning sensor group 1 (left rear parking lamps). The rear electronic module (REM) detects lamp faults when the current is below 0.6A (4 doors) / 0.45A (5 doors)
• current, bulb failure warning sensor group 2 (right rear parking lamps). The rear electronic module (REM) detects lamp faults when the current is below 0.6A (4 doors) / 0.45A (5 doors)
• current, lamp fault rear fog lamp. The rear electronic module (REM) detects lamp faults when the current is below 1.5A
• Central electronic module (CEM) driver brake (off, on). Checks the input signal from the stop lamp driver from the central electronic module (CEM) to the rear electronic module (REM)
• stop lamp check (lamp on, lamp off). Checks whether the rear electronic module (REM) transmits a signal to activate the stop lamp relay
• current, lamp fault, stop lamp. The rear electronic module (REM) detects lamp faults when the current is below 3.0 A
• status of back-up gear (idle, engaged)
• status of the relay for the tailgate wiper. Controls starting and stopping the tailgate wiper (5 doors)
• status of the relay for extended X-supply. Controls the power supply to the tailgate wiper (5 doors)
• status relay warming up diesel filter (Diesel)
• status relay 15I in the power supply
• status relay gas tank valve (Bi-fuel)
• status relay rear A/C (XC90)
• cargo compartment lighting output signal (0W - 10W)
• position sensor input signal for the headlamp beam height control (1.7V -3.2V)
• calibration status of the position sensor for headlamp beam height control
• status seat belt reminder passenger (off/on)
• input signal anode/cathode for seat belt reminder.