DTC Readout (CF - Convenience Feature)

Applies to W140, 1992-93 model years

Testing with impulse counter scan tool:  

1. Connect impulse counter scan tool according to connection diagram.

013   Impulse counter scan tool   dtf-cf_connection.gif (16215 bytes)
075 Impulse counter scan tool adapter
X11/4    Data link connector (DTC readout, 38-pin)

 Note: LED "U-Batt" must light up, if not, refer to detailed tests located in Specific Literature Recommendation listed below.

2. Ignition: ON

3. Press start button for 2 to 4 seconds.

4. Read and note DTC readout displayed. Display "1" = no fault stored, Greater than "1" = faults in system.

5. Press start button again for 2 to 4 seconds. If there are no further faults in the system, the previously displayed DTC will reappear. If additional faults exist, then the respective DTC will be displayed.

6. Repeat step 5 until the first DTC displayed is repeated.

7. Note any additional faults from the DTC readout.

8. Eliminate all noted faults (DTC readout) according to troubleshooting chart and diagnostic tests.

Erasing DTC memory:
After eliminating a fault, the respective DTC readout must be cleared as follows:

9. Press start button for 2 to 4 seconds and read out the DTC. Then press the start button for 6 to 8 seconds.
Note: Each DTC displayed must be erased individually.

10. Ignition: OFF and wait 30 seconds.

If the fault has been eliminated and its respective DTC erased, then the DTC will no longer be displayed when performing the DTC readout. If the DTC displayed is greater than 1, then there are further DTC's in the system.

DTC Codes for Convenience Feature (CF)

DTC readout

Possible cause
1 No fault in system
5 Closing circuit for left front power window motor (M10/3), control module
3 Opening circuit for left front power window motor (M10/3), control module
4 Closing circuit for right front power window motor (M10/4), control module
5 Opening circuit for right front power window motor (M10/4), control module
6 Closing circuit for left rear power window motor (M10/5), control module
7 Opening circuit for left rear power window motor (M10/5), control module
8 Closing circuit for right rear power window motor (M10/6), control module
9 Opening circuit for right rear power window motor (M10/6), control module
10 Switch for left front power window (S21/1): Closing time exceeded
11 Switch for left front power window (S21/1): Opening time exceeded
12 Switch for right front power window (S21/2): Closing time exceeded
13 Switch for right front power window (S21/2): Opening time exceeded
14 Left rear power window circuit (S21/3) and left rear power window switch, front console (S21/5): closing time exceeded
15 Left rear power window circuit (S21/3) and left rear power window switch, front console (S21/5): opening time exceeded
16 Right rear window circuit (S21/4) and right rear power window switch, front console (S21/6): closing time exceeded
17 Right rear window circuit (S21/4) and right rear power window switch, front console (S21/6): opening time exceeded
18 Circuit for left front lock switch (S86/1), right front (S87/1), trunk lid lock switch (S88/2): closing time exceeded
19 Circuit for left front lock switch (S86/1), right front (S87/1), trunk lid lock switch (S88/2): opening time exceeded
20 Left front power window switch (S21/1): short to ground or wires reversed
21 Right front power window switch (S21/2): short to ground or wires reversed
22 Left rear window circuit (S21/3) and left rear power window switch (front console S21/5): short to ground or wires reversed
23 Right rear window circuit (S21/4) and right rear power window switch (front console S21/6): short to ground or wires reversed
24 Left front power window motor circuit (M10/3): Wiring or speed sensor
25 Right front power window motor circuit (M10/4): Wiring or speed sensor
26 Left rear power window motor circuit (M10/5): Wiring or speed sensor
27 Right rear power window motor.circuit (M10/6): Wiring or speed sensor
28 Left front power window motor circuit (M10/3): Sensor wiring reversed
29 Right front power window motor circuit (M10/4): Sensor wiring reversed
30 Left rear power window motor circuit (M10/5): Sensor wiring reversed
31 Right rear power window motor circuit (M10/6): Sensor wiring reversed
32 Left front power window motor circuit (M10/3): Speed sensor signal defective
33 Right front power window motor circuit (M10/4): Speed sensor signal defective
34 Left rear power window motor circuit (M10/5): Speed sensor signal defective
35 Right rear power window motor circuit (M10/6): Speed sensor signal defective
36 Convenience control module (N57) defective
37 Voltage too low ( < 9 V)
38 Sliding/pop-up roof switch circuit (S13/2): Short, check wiring harness
39 Voltage supply circuit 30 A.control module
40 Voltage supply circuit 30 B.control module

 

Hit Counter Updated 07/25/2006 01:07