M3 CSL Wiki



== The SMG Gearbox ==

Burkhart SMG WiKi...<br/>
[https://burkhart-engineering.com/en/smg-wiki/#1583066686125-8d2f18bd-dc65, SMG Components]<br>
[https://burkhart-engineering.com/en/smg-wiki/#1583066684240-2c6c5372-a94a, SMG Error Codes]

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== Fault finding ==

Symptoms:

''Gearbox not selecting gears.''<br/>
Pump not running, no pressure in accumulator(needs 45 bar to shift to 0). Brake pedal microswitch not made?<br/>
''Jumping out of gear.''<br/>
''Cog of doom!''<br/>

Diagnosis/Solutions:

[[#Salmon Relay]]<br/>
[[#SMG fluid level]]<br/>
[[#Read error code(s)]]<br/>


----
<div id="Salmon Relay">'''Salmon Relay'''</div>

Under the bonnet, there is a rectangular black relay box with four Allen head bolts on the nearside - there is only one salmon coloured relay in there.<br/>
Pt No. '''12631742690''' Relay changer salmon red: From:09/06/1994<br/>
Supersedes: 12630153635(01/01/2003 — 12/11/2006)<br/>
NB: Used in TWO places<br/>
1) Relay for hydraulic pump SMG K5360<br/>
2) Secondary air injection pump relay K6304(located offside of car)<br/>

----
<div id="SMG fluid level">'''SMG fluid level'''</div>

Check the fluid level!<br/>

----
<div id="Read error code(s)">'''Read error code(s)'''</div>

'''Codes'''<br/>

{|
|Error code		||Error description										||Possible Cause											||Activities||
|-
|16 (0x10)		||Control of solenoid valve switching path forward		||Solenoid valve switching path forward defective			||Replace solenoid valve switching path forward	||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|17 (0x11)		||Control of solenoid valve switching path return		||Solenoid valve switching path back defective				||Replace solenoid valve switching path forward	||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|18 (0x12)		||Control of solenoid valve dial angle					||Solenoid valve selector angle defective					||Replace solenoid valve selector bracket		||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|19 (0x13)		||Control of Shift Lock									||Shift lock magnet defective								||Replace shift lock magnet						||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|20 (0x14)		||Starter release										||Starter relay defective									||Replace starter relay							||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|21 (0x15)		||Hydraulic pump relay									||Hydraulic unit relay is hanging							||Replace hydraulic unit relay					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|22 (0x16)		||Activation of the reverse light switch	
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|23 (0x17)		||Activation of the clutch solenoid valve				||Solenoid valve clutch defective							||Replace the clutch solenoid valve				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|32 (0x20)		||Evaluation of the transmission input speed			||Speed sensor defective									||Replace speed sensor							||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|33 (0x21)		||Evaluation of engine speed (sensor)					||sensor defect												||Replace sensor								||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|34 (0x22)		||Transmission temperature								||Defective temperature sensor								||Replace temperature sensor					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|35 (0x23)		||Evaluation of hydraulic pressure sensor				||Defective pressure sensor									||Replace pressure sensor						||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|36 (0x24)		||Evaluation of position encoder dial angle				||Gear recognition sensor defective							||Replace gear recognition sensor				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|37 (0x25)		||Evaluation of position transmitter switching path		||Gear recognition sensor defective							||Replace gear recognition sensor				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|38 (0x26)		||Evaluation of longitudinal acceleration				||Longitudinal acceleration sensor defective				||Replace the longitudinal acceleration sensor	||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|39 (0x27)		||Hydraulic temperature									||Defective temperature sensor								||Replace temperature sensor					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|40 (0x28)		||Evaluation of PLCD sensor for clutch position			||PLCD sensor defective										||Slave cylinder exchange						||
|-
|				||														||defective coupling										||Exchange clutch								||
|-
|48 (0x30)		||Gear cannot be engaged								||Gear recognition sensor defective							||Replace gear recognition sensor				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|49 (0x31)		||Gang jumper											||Gear recognition sensor defective							||Replace gear recognition sensor				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|50 (0x32)		||Dial angle not adjustable								||Gear recognition sensor defective							||Replace gear recognition sensor				||
|-
|				||														||Solenoid valve selector angle defective					||Replace solenoid valve selector bracket		||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|51 (0x33)		||Evaluation of bonnet contact while driving			||One of the two cover contacts is defective				||Replace defective cover contact				||
|-
|52 (0x34)		||Evaluation of bonnet contact while stationary			||One of the two cover contacts is defective				||Replace defective cover contact				||
|-
|53 (0x35)		||Undershoot of pressure range HE						||Hydraulic unit relay is hanging							||Replace hydraulic unit relay					||
|-
|				||														||Worn electric motor										||Replace electric motor						||
|-
|				||														||Defective pressure sensor									||Replace pressure sensor						||
|-
|				||														||Leak in the hydraulic system								||Seal leak										||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|54 (0x36)		||Pressure range exceeded HE							||Hydraulic unit relay is hanging							||Replace hydraulic unit relay					||
|-
|				||														||Defective pressure sensor									||Replace pressure sensor						||
|-
|55 (0x37)		||Frequency of switching on the hydraulic unit			||Worn electric motor										||Electric motor swap							||
|-
|				||														||The piston accumulator preload pressure is no longer OK	||Piston accumulators exchange					||
|-
|				||														||SMG relay is hanging										||Replace hydraulic unit relay					||
|-
|				||														||Internal leakage at high temperatures						||Switch to high performance oil				||
|-
|				||														||External leakage											||Seal leak										||
|-
|				||														||Hydraulic oil level too low								||Refill hydraulic oil							||
|-
|				||														||Air in the system											||Bleeding										||
|-
|				||														||Defective temperature sensor								||Temperature sensor exchange					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||open circuit												||												||
|-
|56 (0x38)		||Duty cycle of the hydraulic unit						||Worn electric motor										||Electric motor swap							||
|-
|				||														||The piston accumulator preload pressure is no longer OK	||Piston accumulators exchange					||
|-
|				||														||SMG relay is hanging										||Replace hydraulic unit relay					||
|-
|				||														||Internal leakage at high temperatures						||Switch to high performance oil				||
|-
|				||														||External leakage											||Seal leak										||
|-
|				||														||Hydraulic oil level too low								||Refill hydraulic oil							||
|-
|				||														||Air in the system											||Bleeding										||
|-
|				||														||Defective temperature sensor								||Temperature sensor exchange					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|57 (0x39)		||Misuse of the hydraulic unit							||Worn electric motor										||Electric motor swap							||
|-
|				||														||The piston accumulator preload pressure is no longer OK	||Piston accumulators exchange					||
|-
|				||														||SMG relay is hanging										||Replace hydraulic unit relay					||
|-
|				||														||Internal leakage at high temperatures						||Switch to high performance oil				||
|-
|				||														||External leakage											||Seal leak										||
|-
|				||														||Hydraulic oil level too low								||Refill hydraulic oil							||
|-
|				||														||Air in the system											||Bleeding										||
|-
|				||														||Defective temperature sensor								||Temperature sensor exchange					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|58 (0x3A)		||Gang cannot be interpreted							||Air in the system											||Vent and adapt								||
|-
|59 (0x3B)		||Control clutch										||PLCD sensor defective										||Slave cylinder exchange						||
|-
|				||														||Defective coupling										||Exchange clutch								||
|-
|				||														||Release bearing defective									||Replace release bearing						||
|-
|80 (0x50)		||SMG control unit internal error						||SMG control unit defective								||Replace SMG control unit						||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|81 (0x51)		||Evaluation ESTATE										||															||												||
|-
|83 (0x53)		||Transmission adaptation								||Adaptation not carried out successfully					||Correct the displayed error when the adaptation is aborted	||
|-
|84 (0x54)		||General adaptation									||Adaptation not carried out successfully					||Correct the displayed error when the adaptation is aborted	||
|-
|85 (0x55)		||Adaptation of the clutch								||Adaptation not carried out successfully					||Correct the displayed error when the adaptation is aborted	||
|-
|86 (0x56)		||Vents													||															||												||
|-
|87 (0x57)		||Action modes											||															||												||
|-
|88 (0x58)		||Gearbox adaptation values								||															||												||
|-
|97 (0x61)		||Power supply											||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|98 (0x62)		||Sensor power supply A									||Vsensor  <4.5 V											||Check wiring harness and plug connections		||
|-
|				||														||Vsensor> 5.5 V											||												||
|-
|				||														||Influences the longitudinal acceleration sensor , dial angle 1, shift travel 1||							||
|-
|99 (0x63)		||Sensor power supply B									||Vsensor  <4.5 V											||Check wiring harness and plug connections
|-
|				||														||Vsensor> 5.5 V											||												||
|-
|				||														||Influences hydraulic pressure sensor, dial angle 2, shift travel 2||										||
|-
|100 (0x64)		||Power supply for solenoid valves switching path		||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|101 (0x65)		||Power supply for solenoid valves, clutch and dial bracket	||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|114 (0x72)		||Evaluation of selector lever							||Selector lever defective									||Replace selector lever						||
|-
|115 (0x73)		||Evaluation of consumer shutdown VA					||															||												||
|-
|116 (0x74)		||Evaluation of program selector switch plus			||															||												||
|-
|117 (0x75)		||Evaluation of program selector switch minus			||															||												||
|-
|118 (0x76)		||Evaluation of steering wheel switch +					||															||												||
|-
|119 (0x77)		||Evaluation of steering wheel switch -					||															||												||
|-
|120 (0x78)		||Evaluation of ignition lock signal					||															||												||
|-
|128 (0x80)		||Incorrect CAN message / CAN bus error					||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|129 (0x81)		||CAN error												||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|144 (0x90)		||Evaluation of door contact via CAN					||Door contact sensor defective								||Replace door contact sensor					||
|-
|				||														||Open circuit												||												||
|-
|145 (0x91)		||Evaluation of the rear left speed						||Wheel speed sensor defective								||Replace wheel speed sensor					||
|-
|				||														||Speed sensor (gear) defective								||Speed sensor (gearbox) defective				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|146 (0x92)		||Evaluation of the speed at the rear right				||Wheel speed sensor defective								||Replace wheel speed sensor					||
|-
|				||														||Speed sensor (gear) defective								||Speed sensor (gearbox) defective				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|147 (0x93)		||Evaluation of the front left speed					||Wheel speed sensor defective								||Replace wheel speed sensor					||
|-
|				||														||Speed sensor (gear) defective								||Speed sensor (gearbox) defective				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||-
|-
|				||														||Open circuit												||												||
|-
|148 (0x94)		||Evaluation of the speed in the front right			||Wheel speed sensor defective								||Replace wheel speed sensor					||
|-
|				||														||Speed sensor (gear) defective								||Speed sensor (gearbox) defective				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|149 (0x95)		||Evaluation of speeds (more than one signal)			||Wheel speed sensor defective								||Replace wheel speed sensor					||
|-
|				||														||Speed sensor (gear) defective								||Speed sensor (gearbox) defective				||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|150 (0x96)		||Evaluation of engine speed (CAN)						||Sensor defect												||Replace sensor								||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|151 (0x97)	Evaluation of service brake signals via CAN					||Longitudinal acceleration sensor defective				||Replace longitudinal acceleration sensor		||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|152 (0x98)		||Evaluation of steering angle via CAN					||Steering angle sensor defective							||Replace steering angle sensor					||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|153 (0x99)		||Evaluation of lateral acceleration via CAN			||Sensor defect												||Replace sensor								||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|154 (0x9A)		||Evaluation of longitudinal acceleration via CAN		||Longitudinal acceleration sensor defective				||Replace longitudinal acceleration sensor		||
|-
|				||														||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|155 (0x9B)	Evaluation of accelerator pedal value via CAN				||Short circuit												||Check wiring harness and plug connections		||
|-
|				||														||Open circuit												||												||
|-
|176 (0xB0)		||Safety concept level 2 transmission					||															||												||
|-
|177 (0xB1)		||Safety concept level 2 clutch							||															||												||
|-
|178 (0xB2)		||Level 3 security concept								||															||												||
|-
|179 (0xB3)		||Security concept level 2 RAM							||															||												||
|-
|180 (0xB4)		||Security concept level 2 INPUT						||															||												||
|-
|255 (0xFF)		||Unknown error location								||															||												||
|}