4.2 Infrared Remote Central Locking (IRCL) Contents

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1 4.2 Infrared Remote Central Locing (IRCL) Contents 4.2 Model 140 up to M.Y Page Diagnosis Function Test /1 Diagnostic Trouble Code (DTC) Memory /1 Electrical Test Program Component Locations /1 Preparation for Test /1 Test /1 b Diagnostic Manual Body and Accessories 04/ IRCL C/1

2 Diagnosis Function Test Preliminary wor: Chec operation of central locing, see PSE/CL 11 O (3.1) Chec batteries in infrared transmitter ey, see SMS, Repair Instructions, Job No Figure 1 P b Diagnostic Manual Body and Accessories 04/ IRCL 11/1

3 Diagnosis Function Test Preparation for Test: 1. Battery voltage V, 2. Fuse F4 2 and F4 15 o, 3. Central locing system in proper operating condition, 4. Batteries in ey holder (infrared transmitter) o, 5. Infrared transmitter synchronized (see note below), 6. Key removed from steering loc, 7. Side windows lowered approx. 100 mm (4 in.), 8. Sliding/pop-up roof open, (Windows must be synchronized for steps 7 and 8, see note below) 9. Doors and trun lid closed, 10. Central locing system unloced. Electrical wiring diagrams See Electrical Troubleshooting Manual, Model 140. Note: If the windows cannot be fully opened or closed using the one-touch feature (e.g., after the vehicle s battery has been disconnected), re-synchronize windows by pressing the upper half of each window switch to the 2nd detent until the window is completely closed and hold for an additional 2 seconds. Repeat procedure for each window. Note for models as of 12/93: If an IR transmitter is lost, it can be disabled from controlling the IRCL system by de-synchronizing the IRCL control module and then resynchronizing (recoding) the remaining IR transmitter(s). Thus, only the mechanical locs need to be replaced to assure vehicle security. De-synchronizing/Re-synchronizing Infrared Signal for IRCL De-synchronizing (as of 12/93 production only) 1. Ground the IRCL pin in the data lin connector (X11/4) for seconds with the ignition ON. 2. De-synchronization can also be performed with the impulse counter scan tool by connecting the scan tool to the data lin connector (see section 0), turning the ignition ON and pressing the start button for seconds. 3. The HHT can be used as well by following the menu-driven commands. Re-synchronizing (as of 12/93 production only) 1. To synchronize the infrared transmitter, point the infrared transmitter toward a receiver and press button momentarily. Using the mechnical ey, s witch on ignition within 30 seconds. This will synchronize and enable the control module to recognize the infrared transmitter. b Diagnostic Manual Body and Accessories 04/ IRCL 11/2

4 Diagnosis Function Test Test step/test scope Test condition Nominal value Possible cause/remedy 1) O 1.0 Locing of vehicle with infrared remote control via left front door IR receiver (A26/1). Loc vehicle using IR transmitter via the left front door. Vehicle is loced. All red indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Red indicator lamp of receiver in left front door blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O O 2.0 Unlocing of vehicle with infrared remote control via left front door IR receiver (A26/1). Unloc vehicle using IR transmitter via the left front door. Vehicle is unloced. All green indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Green indicator lamp of receiver in left front door blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O 1.0, , O 3.0 Locing of vehicle with infrared remote control via right front door IR receiver (A26/2). Loc vehicle using IR transmitter via the right front door. Vehicle is loced. All red indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Red indicator lamp of receiver in right front door blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O , ) Observe Preparation for Test, see 22. b Diagnostic Manual Body and Accessories 09/ IRCL 11/3

5 Diagnosis Function Test Test step/test scope Test condition Nominal value Possible cause/remedy 1) O 4.0 Unlocing of vehicle with infrared remote control via right front door receiver (A26/2). Unloc vehicle using IR transmitter via the right front door. Vehicle is unloced. All green indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Green indicator lamp of receiver in right front door blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O 1.0, , O 5.0 Locing of vehicle with infrared remote control via trun lid receiver (A26/3). Loc vehicle using IR transmitter via the trun lid. Vehicle is loced. All red indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Red indicator lamp of receiver in trun lid blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O , O 6.0 Unlocing of vehicle with infrared remote control via trun lid receiver (A26/3). Unloc vehicle using IR transmitter via the trun lid. Vehicle is unloced. All green indicator lamps blin for a maximum of approx. 3 seconds (vehicles up to 06/93). Green indicator lamp of receiver in trun lid blins for a maxium of approx. 3 seconds (vehicles as of 07/93). 23 O 1.0, , O 7.0 Close side windows and sliding/pop-up roof with infrared remote control. Point IR transmitter towards one of the IR receivers and press transmit button for > 1 second. Side windows and sliding/pop-up roof close. 23 O 1.0, ) Observe Preparation for Test, see 22. b Diagnostic Manual Body and Accessories 09/ IRCL 11/4

6 Diagnosis Function Test Test step/test scope Test condition Nominal value Possible cause/remedy 1) O 8.0 Open side windows and sliding/pop-up roof with infrared remote control. With the side windows and sliding/pop-up roof open, loc vehicle using infrared transmitter. Within 10 seconds, point IR transmitter towards one of the IR receivers and press transmit button for > 4 seconds. Side windows and sliding/pop-up roof open. 23 O 1.0, O 9.0 Indication of an improperly closed door or trun lid (vehicles up to 11/93). Open one of the doors or the trun lid. Loc vehicle using IR transmitter Red indicator blins for approx. 10 seconds. 23 O , , , O 10.0 Activate immobilization (vehicles as of 12/93). Loc vehicle using IR transmitter. Try to start engine. Starter motor does not turn. Engine does not start. 23O 23.0 Starter loc-out relay module (K38). O 11.0 Deactivate immobilization (vehicles as of 12/93). Unloc vehicle using IR transmitter. Try to start engine. Starter motor turns. Engine starts. 23O 23.0 Circiut 15, Circuit 50, Starter loc-out relay module (K38), Ignition starter switch (S2/1) 2), Glow/starter switch (S2/2) 3), Starter (M1). 1) Observe Preparation for Test, see 22. 2) Vehicles with gasoline engine 3) Vehicles with diesel engine b Diagnostic Manual Body and Accessories 09/ IRCL 11/5

7 Diagnosis - Diagnostic Trouble Code (DTC) Memory Preliminary wor: Function chec Preparation for Test: Connect impulse counter scan tool or Hand-Held Tester (HHT) to 38- pole data lin connector (X11/4) according to connection diagram shown in section 0. Electrical wiring diagrams See Electrical Troubleshooting Manual, Model 140, Volume 2. Note: Connect yellow wire of impulse counter scan tool to socet 31. Special Tools Pulse counter Adapter Equipment Hand-held Tester (HHT) See applicable Service Information in groups 58 and 99. b Diagnostic Manual Body and Accessories 04/ IRCL 12/1

8 Diagnosis - Diagnostic Trouble Code (DTC) Memory Diagnostic trouble code (DTC) 8 A Possible cause Test step/remedy 1) I 00I No malfunction in memory. 2) Open circuit - left front door actuator. 23 O Warning buzzer - open circuit. 23 O Warning buzzer - short circuit to ground. 23 O Red indicator lamps - short to ground. 23 O 11.0, 16.0, Green indicator lamps - short to ground. 23 O 12.0, 17.0, Short to positive, loc circuit 1 23 O 8.0, 13.0, Short to positive, loc circuit 2 23 O 8.0, 13.0, Red indicator lamps - short to positive. 23 O 11.0, 16.0, 21.0 I0 0I0 Green indicator lamps - short to positive. 23 O 12.0, 17.0, 22.0 II 0II IRCL control module (). I2 0I2 Immobilization output, short after circuit O ) Observe Preparation for Test, see 22. 2) If the diagnostic trouble code I (no malfunction in memory) appears, but the vehicle cannot be loced or unloced from either door or trun lid, perform Function Test, Test steps 1 9 with the second infrared transmitter. If the infrared remote control functions with the second transmitter, replace the first transmitter. If the infrared remote control does not function with the second transmitter, perform Test ( 23). b Diagnostic Manual Body and Accessories 04/ IRCL 12/2

9 Electrical Test Program Component Locations Sedan Figure 1 1 Infrared transmitter A26/1 Left front door IR receiver A26/2 Right front door IR receiver A26/3 Trun lid IR receiver P b Diagnostic Manual Body and Accessories 09/ IRCL 21/1

10 Electrical Test Program Component Locations Sedan Figure 2 K38 Starter loc-out relay module IRCL control module P b Diagnostic Manual Body and Accessories 09/ IRCL 21/2

11 Electrical Test Program Component Locations Coupé Figure 3 K38 Starter loc-out relay module IRCL control module P b Diagnostic Manual Body and Accessories 09/ IRCL 21/3

12 Electrical Test Program Component Locations Figure 4 A26/1 Left front door IR receiver A26/2 Right front door IR receiver (mirror image of left shown) Figure 5 A26/3 Trun lid IR receiver (sedan) P P P Figure 6 A26/3 Trun lid IR receiver (coupé) b Diagnostic Manual Body and Accessories 09/ IRCL 21/4

13 Electrical Test Program Component Locations Figure 7 A37, A37/1 PSE control module Figure 8 F4 Rear fuse box (17-fuse, in trun) P P P Figure 9 N26 ATA control module IRCL control module (sedan) b Diagnostic Manual Body and Accessories 09/ IRCL 21/5

14 Electrical Test Program Component Locations Figure 10 IRCL control module (coupé) Figure 11 S2/1 Ignition/starter switch P P A b Diagnostic Manual Body and Accessories 09/ IRCL 21/6

15 Electrical Test Program - Preparation for Test Preliminary wor: Diagnosis - Diagnostic Trouble Code (DTC) Memory Preparation for Test: 1. Provide access to IRCL control module (). 2. Provide access to PSE control module. 3. Disconnect ATA control module (N26). 4. Connect socet box with test cable according to connection diagram, see 22 Figure 1. Electrical wiring diagrams See Electrical Troubleshooting Manual, Model 140, Volume 2. Special Tools pin socet box pin test cable Electrical connecting set Equipment Multimeter 1) Flue models 23, 83, 85, 87 1) Available through the MBUSA Standard Equipment Program. b Diagnostic Manual Body and Accessories 04/ IRCL 22/1

16 Electrical Test Program - Preparation for Test Figure IRCL control module connector 002 Test cable 003 Multimeter 004/050 Socet box (35-pole) IRCL control module Connection Diagram - Socet Box (Sedan) P b Diagnostic Manual Body and Accessories 04/ IRCL 22/2

17 Electrical Test Program - Preparation for Test Figure IRCL control module connector 002 Test cable 003 Multimeter 004/050 Socet box (35-pole) IRCL control module Connection Diagram - Socet Box (Coupé) P b Diagnostic Manual Body and Accessories 04/ IRCL 22/3

18 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 1.0 IRCL control module () circuit 30, circuit 15 Voltage supply 27 w c L 9 Ignition: OFF V O 1.1, Circuit w c L 14 Ignition: OFF Ignition: ON < 1 V V O 1.1, Circuit Circuit 30 o c L 9 Ignition: OFF V Circuit 30. Circuit 15 o c L 14 Ignition: OFF < 1 V Circuit 15. Ignition: ON V b Diagnostic Manual Body and Accessories 04/ IRCL 23/1

19 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 2.0 Vehicles up to11/93 only Left front door actuator (S47) Resistance 27 w b L 6 Disconnect IRCL control module () from. Disconnect ATA control module (N26). Central locing: Loced manually with ey Unloced manually with ey < 5 ] > 20 ] S47. S Sedans up to11/93 only Disconnect from. Left rear rotary tumbler microswitch (S87/2) Resistance 27 w b L 15 Rest position (Left rear door closed) Operate left rear catch by opening door. >20 ] <5 ] S87/2. S87/2. b Diagnostic Manual Body and Accessories 04/ IRCL 23/2

20 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 4.0 Sedans up to 11/93 only Disconnect from. Right rear door rotary tumbler microswitch (S87/3) Resistance 27 w b L 7 Rest position (Right rear door closed) Operate right rear tumbler by opening door. > 20 ] < 5 ] S87/3. S87/ Vehicles up to 11/93 only Disconnect from. Right front door rotary tumbler microswitch (S87/6) Resistance 27 w b L 17 Rest position (Right front door closed) Operate right front catch by opening door. >20 ] <5 ] S87/6. S87/6. b Diagnostic Manual Body and Accessories 09/ IRCL 23/3

21 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy Vehicles up to 11/93 only Ignition/starter switch (S2/1) Warning buzzer contact 16 w c L 9 Disconnect from. Remove ey from ignition. Ignition ey in position V < 1 V 3.1 PSE 23 O 4.0, PSE 23 O 4.0, Vehicles up to 11/93 only Rotary tumbler/trun lid microswitch (S88/1) Resistance 26 w c L 9 Disconnect from. Close tumbler by hand. Open trun lid tumbler. < 1 V V 3.1 PSE/RTG 23 O PSE/RTG 23 O 1.0, 3.1 PSE/CL 23 O 8.0, Closing assist supply pump (M14/3). b Diagnostic Manual Body and Accessories 09/ IRCL 23/4

22 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy IRCL control module () Left front door loc switch (S86/1) Voltage supply 27 w c L 11 All doors closed and loced manually with ey V 3.1 PSE/CL 23 O 4.0, (on vehicles up to 11/93).. Unloc vehicle via left front door with IR transmitter and hold button. <1 V Green indicator lamp flashes. O 9.0 to 12.0,. 27 w c L 23 All doors closed and unloced manually with ey V 3.1 PSE/CL 23 O 4.0, (on vehicles up to 11/93).. Loc vehicle via left front door with IR transmitter and hold button. <1 V Red indicator lamp flashes. O 9.0 to 12.0,. 9.0 Left front door IR receiver (A26/1) Voltage supply 13 w c L V O 9.1,. b Diagnostic Manual Body and Accessories 09/ IRCL 23/5

23 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 9.1 A26/1 Voltage supply 2 w A26/1 c L 3 Remove A26/ V Left front door IR receiver (A26/1) Infrared signal control circuit 27 w c L 18 Loc vehicle using IR transmitter at left front door and eep button depressed. After completion of the locing process, read value. Afterwards, release button and read second value. Difference of values between button depressed and button released approx V. A26/ L 9 Left front door IR receiver (A26/1) Red indicator lamp Disconnect from. No bridge connected. Red indicator lamp off. A26/1, u u 13 9 Both bridges connected. Red indicator lamp lights. A26/1. b Diagnostic Manual Body and Accessories 09/ IRCL 23/6

24 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy I0 Left front door IR receiver (A26/1) Green indicator lamp Disconnect from. No bridge connected. Green indicator lamp off. A26/1, u u 13 9 Both bridges connected. Green indicator lamp lights. A26/1. b Diagnostic Manual Body and Accessories 09/ IRCL 23/7

25 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy IRCL control module () Right front door loc switch (S87/1) Voltage supply 27 w c L 11 All doors closed and loced manually with ey V 3.1 PSE/CL 23 O 2.0, (vehicles up to 11/93 only).. Unloc vehicle via right front door with IR transmitter and hold button. <1 V Green indicator lamp flashes. O 14.0 to 17.0,. 27 w c L 23 All doors closed and unloced manually with ey V 3.1 PSE/CL 23 O 2.0, (vehicles up to 11/93 only).. Loc vehicle via right front door with IR transmitter and hold button. <1 V Red indicator lamp flashes. O 14.0 to 17.0, Right front door IR receiver (A26/2) Voltage supply 13 w c L V O 14.1,. b Diagnostic Manual Body and Accessories 09/ IRCL 23/8

26 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 14.1 A26/2 Voltage supply 2 w A26/2 c L 3 Remove A26/ V Right front door IR receiver (A26/2) Infrared signal control circuit 27 w c L 8 Loc vehicle using IR transmitter at right front door and eep button depressed. After completion of the locing process, read value. Afterwards, release button and read second value. Difference of values between button depressed and button released approx V. A26/ L 9 Right front door IR receiver (A26/2) Red indicator lamp Disconnect from. No bridge connected. Red indicator lamp off. A26/2, u u 13 9 Both bridges connected. Red indicator lamp lights. A26/2. b Diagnostic Manual Body and Accessories 09/ IRCL 23/9

27 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy I0 Right front door IR receiver (A26/2) Green indicator lamp Disconnect from. No bridge connected. Green indicator lamp off. A26/2, u u 13 9 Both bridges connected. Green indicator lamp lights. A26/2. b Diagnostic Manual Body and Accessories 09/ IRCL 23/10

28 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy IRCL control module () Trun lid loc switch (S88/2) Voltage supply 27 w c L 11 All doors closed and loced manually with ey V 3.1 PSE/CL 23 O 3.0, (vehicles up to 11/93 only).. Unloc vehicle via trun lid with IR transmitter and hold button. <1 V Green indicator lamp flashes. O 19.0 to 22.0,. 27 w c L 23 All doors closed and unloced manually with ey V 3.1 PSE/CL 23 O 3.0, (vehicles up to 11/93 only).. Loc vehicle via trun lid with IR transmitter and hold button. <1 V Red indicator lamp flashes. O 19.0 to 22.0, Trun lid IR receiver (A26/3) Voltage supply 24 w c L V O 19.1,. b Diagnostic Manual Body and Accessories 09/ IRCL 23/11

29 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy 19.1 A26/3 Voltage supply 2 w A26/3 c L 3 Remove A26/ V Trun lid IR receiver (A26/3) Infrared signal control circuit 27 w c L 4 Loc vehicle using IR transmitter at trun and eep button depressed. After completion of the locing process, read value. Afterwards, release button and read second value. Difference of values between button depressed and button released approx V. A26/ L 9 Trun lid IR receiver (A26/3) Red indicator lamp Disconnect from. No bridge connected. Red indicator lamp off. A26/3, u u 24 9 Both bridges connected. Red indicator lamp lights. A26/2. b Diagnostic Manual Body and Accessories 09/ IRCL 23/12

30 Electrical Test Program - Test O N A Test scope Test connection Test condition Nominal value Possible cause/remedy I0 Trun lid IR receiver (A26/3) Green indicator lamp Disconnect from. No bridge connected. Green indicator lamp off. A26/3, u 13 9 Both bridges connected. Green indicator lamp lights. A26/ I2 Vehicles as of 12/93 only Immobilization output 25 w c L 9 Unloc vehicle by pointing IR transmitter toward one of the three IR receivers. Open driver s window. Loc vehicle by pointing IR transmitter toward one of the three IR receivers. Ignition: ON V O 1.0, ,. < 1 V 24.0 Diagnosis output 27 w c L V. b Diagnostic Manual Body and Accessories 09/ IRCL 23/13

31 Electrical Test Program - Test P P P Figure 1 W6 Ground (left wheelhousing in trun) (coupé) Figure 2 W7/1 Ground (right rear taillamp in trun) (sedan) Figure 3 X11/15 Diagnostic intermediate connector (taillamp harness) (16-pole) b Diagnostic Manual Body and Accessories 09/ IRCL 23/14

32 Electrical Test Program - Test P P P A Figure 4 X35/1 Left front door separation point X35/2 Right front door separation point (mirror image of left shown) Figure 5 X35/3 Left rear door separation point (sedan only) X35/4 Right rear door separation point (sedan only) (mirror image of left shown) Figure 6 X99/1 Terminal bloc (left front door ground) X99/2 Terminal bloc (right front door ground) (mirror image of left shown) b Diagnostic Manual Body and Accessories 09/ IRCL 23/15

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