ad4231p5000a

Brake Assist (BAS) diagnosis - troubleshooting

Type ad · topic 42.31 · version 0108 · 2003-06-10

Applies to: MODEL 129 MODEL 140 MODEL 170 MODEL 202 except CODE (472a) Electronic Stability Program (ESP) MODEL 208 except CODE (472a) Electronic Stability Program (ESP) MODEL 210 MODEL 210 with ENGINES 112, 113, 606 except CODE (472a) Electronic Stability Program (ESP)

Where it sits

Function group 2 Chassis › 42 Brakes - hydraulic and mechanical systems › 42.31 Brake assist (BAS) — Series 129 · Series 140 · Series 170 · Series 202 · Series 208 · Series 210

Also applies to engines/gearboxes: 112 ***, 113 ***, 606 ***

AD42.31-P-5000A

Brake Assist (BAS) diagnosis - troubleshooting

25.3.96

MODEL 129

MODEL 140

MODEL 170

MODEL 202 except CODE (472a) Electronic Stability Program (ESP)

MODEL 208 except CODE (472a) Electronic Stability Program (ESP)

MODEL 210

MODEL 210 with ENGINES 112, 113, 606 except CODE (472a) Electronic Stability Program (ESP)

Brake Assist (BAS) diagnosis, advanced information

AD00.00-P-1000AZ

Connection and use of test equipment

AD42.31-P-2000A

Troubleshooting

Complaint

Possible cause

Notes

Remedy/Test step

BAS/ESP (A1e47), BAS/ASR (A1e48) or BAS/ETS (A1e49) malfunction indicator lamp illuminated with engine running

BAS, diagnosis, fault memory

AD42.31-P-4000A

BAS/ESP (A1e47), BAS/ASR (A1e48) or BAS/ETS (A1e49) malfunction indicator lamp comes on while driving and does not go out again

BAS, diagnosis, fault memory

AD42.31-P-4000A

BAS/ESP (A1e47), BAS/ASR (A1e48) or BAS/ETS (A1e49) malfunction indicator lamp comes on while driving and goes out again

On-board voltage <11V, too many electric consumers in operation

BAS, diagnosis, fault memory

AD42.31-P-4000A

Prerequisites for generator testing

Engines 103, 104, 112, 113, 119 in model 129

Engines 111.977, 112.942, 113.942, 612.963 in model 163

Engines 166.940/960, 669.940/941 in model 168

Engines 111.9443/946/973 in model 170

Engines 104.941, 111.920/921/941/944/
945/961/974/975, 605.910/960 in model 202

Engines 111.944/945/975, 112.940 in model 208

Engines 104.945/995, 112.942/947/970, 112.911/921/941, 113.940, 119.985, 602.982,604.912/917, 605.912/962, 606.912/962, 611.961, 612.961, 613.961 in model 210

AR15.40-P-5009EA

Test the charge voltage of the generator

Engines 112.912/943, 113.961 in model 129

Engine 111.977, 112.942, 113.942, 612.963 in model 163

Engines 166.940/960, 668.940/941 in model 168

Engines 111.943/946/973 in model 170

Engines 104.941, 111.920/921/941/944/945/961/974/975, 601.913, 604.910/915, 605.910/960 in model 202

Engines 111.944/945/975, 112.940 in model 208

Engines 104.945/995, 111.942/947/970, 112.911/921/941, 113.940, 119.985, 602.982, 604.912/917, 605.912/962, 606.912/962, 612.961, 613.961 in model 210

AR15.40-P-5011EA

Test generator with a regulator in the vehicle

Model 140

ra15001405010x

Test the control voltage of the generator.

Engines 103, 104, 112, 113, 119, 120 in model 129

Engines 111.977, 112.942, 113.942, 612.963 in model 163

Engines 166.940/960/990, 668.940/941 in model 168

Engines 111.943/946/973 in model 170

Engines 104.941, 111.920/921/941/944/945/961/974/975, 601.913, 604.910,915, 605.910/960 in model 202

Engines 111.944/945/975, 112.940 in model 208

Engines 104.945/995, 111.942,947,970, 112.911/921/941, 113.940, 119.985, 602.982, 604.912/917, 605.912/962, 606.912/962, 612.961, 613.961 in model 210

AR15.40-P-5010EA

Brake pad wear indicator lamp (A1e6), low brake fluid level/parking brake indicator lamp (A1e7), ASR warning lamp (A1e21), ESP warning lamp (A1e41), ABS malfunction indicator lamp (A1e17), BAS/ETS (A1e49), BAS/ASR (A1e48) or BAS/ESP (A1e47) do not come on when ignition is turned on

CAN data cable

Read out the fault memory using the Hand-Held Tester

BAS responds too early or too late

The parameters do not correspond with the engine control unit

Using the Hand-Held Tester read out the BAS parameters, code the engine control unit

AD42.31-P-2000-04A

Fault code " CAN-communication with the traction system control unit disrupted, no brake light switch CAN signal, no wheel revs CAN signal" is shown in the fault memory, although there are no BAS customer complaints. BAS indicator lamps do not come on either

If the Hand-Held Tester is used to enter one of the ABS, ETS, ASR or ESP systems, the fault code can be deleted from the BAS

Delete the fault code. No further diagnosis is necessary

Referenced documents