AD42.45-P-4001A | Electronic stability program (ESP) and SPS diagnosis fault memory | 12.8.97 |
MODEL 129 with ENGINE 104, 119, 120 with CODE (472a) electronic stability program (ESP)
MODEL 140 with CODE (472a) electronic stability program (ESP)
MODEL 210 with ENGINE 119 with CODE (472a) electronic stability program (ESP)
| Read out BAS system faults first as faults in other systems are stored in the BAS during the diagnostic mode. The fault code cannot be read out with the pulse counter. | ||
Electronic stability program (ESP) and SPS diagnosis, basic knowledge | |||
Connect Hand-Held Tester (HHT) and read out fault memory | |||
| Ignition: ON | ||
| Read out fault memories of BAS, ETS, ME-SFI and ETC systems | ||
If no fault is stored in the event of a complaint, carry out the whole of electronic stability program (ESP) and SPS testing electrical system | |||
Fault memory | |||
Fault code | Possible cause | Notes | Remedy |
| ESP control module (N47-5) | N47–5 | |
| Battery undervoltage, terminal 87 | ||
| Voltage supply for solenoid valves, open-circuit/short-circuit | ||
| CAN communication generally faulty |
Check ME-SFI coding (HHT) Check ETC coding (HHT) | |
| CAN communication with engine control module (ME-SFI) (N3/10) or right engine control module (ME-SFI) (N3/12) faulty |
Read out ME-SFI fault memory Check ME-SFI coding (HHT) | |
| CAN communication with left engine control module (ME-SFI) (N3/11) faulty |
Read out ME-SFI fault memory Check ME-SFI coding (HHT) | |
| CAN communication with transmission control module (N15/3) faulty | Read out ETC fault memory Check ETC coding (HHT) | |
| Left front axle VSS sensor (L6/1), open-circuit Left front axle VSS sensor (L6/1), loose contact | ||
Left front axle VSS sensor (L6/1), plausibility | Rotor with incorrect number of teeth, dirty or damaged, incorrect rear axle ratio, tires or wheels. If this fault only occurs after a repair, it was caused by the brake test bench or roller dynamometer - erase fault | ||
| Right front axle VSS sensor (L6/2), open-circuit Right front axle VSS sensor (L6/2), loose contact | ||
Right front axle VSS sensor (L6/2), plausibility | Rotor with incorrect number of teeth, dirty or damaged, incorrect rear axle ratio, tires or wheels. If this fault only occurs after a repair, it was caused by the brake test bench or roller dynamometer - erase fault | ||
| Left rear axle VSS sensor (L6/3), open-circuit Left rear axle VSS sensor (L6/3), loose contact | ||
Left rear axle VSS sensor (L6/3), plausibility | Rotor with incorrect number of teeth, dirty or damaged, incorrect rear axle ratio, tires or wheels. If this fault only occurs after a repair, it was caused by the brake test bench or roller dynamometer - erase fault | ||
| Right rear axle VSS sensor (L6/4), open-circuit Right rear axle VSS sensor (L6/4), loose contact | ||
Right rear axle VSS sensor (L6/4), plausibility | Rotor with incorrect number of teeth, dirty or damaged, incorrect rear axle ratio, tires or wheels. If this fault only occurs after a repair, it was caused by the brake test bench or roller dynamometer - erase fault | ||
| ESP yaw rate sensor (N64) signal cable, open-circuit/short-circuit ESP yaw rate sensor (N64) reference cable, open-circuit/short-circuit | ||
| Steering angle sensor (N49), steering angle sensor open-circuit/short-circuit, initializing | ||
| ESP brake pressure sensor (B34) | ||
| Lateral acceleration sensor (B24/2), open-circuit/short-circuit | ||
| Stop lamp switch (4-pin) (S9/1), open-circuit/short-circuit Stop lamp switch (4-pin) (S9/1), plausibility | ||
| Left front axle solenoid valve (hold) (A7/3y6), open-circuit/short-circuit | ||
| Left front axle solenoid valve (release) (A7/3y7), open-circuit/short-circuit | ||
| Right front axle solenoid valve (hold) (A7/3y8), open-circuit/short-circuit | ||
| Right front axle solenoid valve (release) (A7/3y9), open-circuit/short-circuit | ||
| Left rear axle solenoid valve (hold) (A7/3y10), open-circuit/short-circuit | ||
| Left rear axle solenoid valve (release) (A7/3y11), open-circuit/short-circuit | ||
| Right rear axle solenoid valve (hold) (A7/3y12), open-circuit/short-circuit | ||
| Right rear axle solenoid valve (release) (A7/3y13), open-circuit/short-circuit | ||
| Front axle precharge solenoid valve (A7/3y16), open-circuit/short-circuit | ||
| Rear axle precharge solenoid valve (A7/3y17), open-circuit/short-circuit | ||
| Front axle switchover solenoid valve (A7/3y18), open-circuit/short-circuit | ||
| Rear axle switchover solenoid valve (A7/3y19), open-circuit/short-circuit | ||
| Master brake cylinder switchover valve (Y61) | ||
| Solenoid valve relay | Control module ESP (N47-5) | |
| ASR/ESP charging pump (M15), open-circuit/short-circuit | ||
| High-pressure/return pump (A7/3m1), open-circuit/short-circuit High-pressure/return pump (A7/3m1), does not switch off | ||
| Speed sensor plausibility | Rotor with incorrect number of teeth, dirty or damaged, incorrect rear axle ratio, tires or wheels. If this fault only occurs after a repair, it was caused by the brake test bench or roller dynamometer - erase fault | |
| SPS P-valve (Y10) | ||
| Charging piston unit | Check condition of rear brakes Charging piston unit | |
| System has switched off | Steering angle not initialized Undervoltage at yaw rate sensor |
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