MBE 900 4000 Troubleshooting

Section 29.2 Troubleshooting SID 242

Section 29.2
Troubleshooting SID 242

The following procedure will troubleshoot SID 242.‪

Section 29.2.1
242 12 – Cruise Control Switch SET and RES Contacts Closed at the Same Time

Troubleshoot a cruise control SET/RESUME switch fault as follows:‪

  1. Turn ignition on and place the cruise control switch in the “Off” position. Do not start the engine.
  2. Note the driver console display.
    1. If cruise control switch status “RES” is displayed, go to step 3 .
    2. If cruise control switch status “SET” is displayed, go to step 4 .
  3. Unplug the cruise control switch.
    1. If “RES” status is no longer displayed, replace the cruise control SET/RES switch. Erase fault code memory.
    2. If “RES” status is still displayed, repair short to ground in wire 440F to pin 5 of the 18-pin connector. Erase fault code memory. See Figure "Location of DDEC-VCU and Wiring Harness Connectors" and see Figure "Connector Locations on DDEC-VCU" for connector location.
  4. Unplug the cruise control switch. See Figure "Connector Locations on DDEC-VCU" .
    1. If “SET” status is no longer displayed, replace the cruise control SET/RES switch. Erase fault code memory.
    2. If “SET” status is still displayed, repair short to ground in wire 440E to pin 4 of the 18-pin connector. Erase fault code memory. See Figure "Location of DDEC-VCU and Wiring Harness Connectors" and see Figure "Connector Locations on DDEC-VCU" for connector location.
Click to see this graphic in a separate window

 1. Passenger-Side Dash‪

 4. 18-Pin Connector‪

 2. DDEC-VCU‪

 5. 21-Pin Connector‪

 3. 15-Pin Connector‪

 ‪

Figure 1. Location of DDEC-VCU and Wiring Harness Connectors

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 1. 21-Pin DDEC-VCU Connector (VC1)‪

 3. 15-Pin DDEC-VCU Connector (VC4)‪

 2. 18-Pin DDEC-VCU Connector (VC3)‪

 4. DDEC-VCU‪

Figure 2. Connector Locations on DDEC-VCU


MBE 900/4000 Troubleshooting Guide - 6SE422
Generated on 10-13-2008

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