Test 1: Traction Systems Control Module Voltage Supply Circuit 87)
- Using Adapter (140 589 45 63 00), connect Breakout Box (129 589 00 21 00) to traction control module. See Fig 1, Fig 2 or Fig 3. Turn ignition switch to RUN position. Check voltage at terminals No. 10 and 57 at breakout box. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 3).
- Check voltage at terminals No. 10 and 81 at breakout box. if battery voltage exists, system is okay at this time. If battery voltage does not exist, go to step 4).
- Check voltage between ground and terminal No. 10 at breakout box. If battery voltage exists, system is okay at this time. If battery voltage does not exist, check the following:
- C230 and C280 models without control module box, check overvoltage protection relay module fuse. If overvoltage protection relay module fuse is okay, replace overvoltage protection relay module.
- SLK230, E300D, E320, E420 and E430 models, check relay module fuse. If relay module fuse is okay, replace relay module.
- C230 and C280 models with control module box, check passenger side fuse and relay module box. Replace as necessary.
- SL320, SL500 models, check base module fuse. If base module fuse is okay, replace base module.
- Turn ignition switch to OFF position. Disconnect traction control module, leaving wiring harness connected to breakout box. Check resistance between appropriate ground and terminal No. 57 at breakout box and between appropriate ground and terminal No. 81 at breakout box. Resistance should be less than one ohm. If resistance is not as specified repair appropriate wire or ground point connection as follows:
- On C230 and C280 models without control module box, ground point is located in right side component compartment.
- On C230 and C280 models with control module box, ground point is located at left "A" pillar.
- On CL500, E300D, E300TD, E320, E420, E430, S320, S420 and S500 models, ground point is located in right footwell.
- On SL320 and SL500 models, ground point is located at control module box/control module.
- On SLK230, ground point is located at component compartment.
Fig 1: Connecting Breakout Box & Identifying Control Module Location (C230 & C280 With Control Module Box, CLK320, E300D, E330TD, E320, E420, E430, & SLK230)