PROJEKT36 · WIRING

Automatic gearbox

The gearbox control unit for each E36 automatic: the four-speed A4S 310R (separate layouts for four- and six-cylinders) and the five-speed A5S 310Z and A5S 300J. Function from BMW's pin table, wire colour and where the wire goes.

Petrol E36 automatics from the 1998 BMW wiring manual. Check your gearbox type on the plate before using a pin map. On a phone, scroll the diagram sideways.

projekt36.com/wiring/automatic-gearbox/

SW blackRT redGN greenBL blueGE yellowBR brownWS white GN/SW = green with black stripe supply / ground of a part shown elsewhere

A4S 310R, four-cylinder: X8500

0.5 VI gearshift unit X8521 pin 2 (MV4) 0.5 GR gearshift unit X8521 pin 1 (MV3) ground X6454 0.5 BR/SW selector switch X511 pin 7 (L2) 0.5 BR/WS selector switch X511 pin 8 (L4) 0.5 BL/RT brake light switch S29 X116 pin 2 0.5 GE/GN program switch X8503 pin 7 (S) 0.5 GE/WS program switch X8503 pin 1 (M) 0.5 SW speed sensor X8516 pin 2 speed sensor shield 0.5 GE/GN program switch X8503 pin 7 (S) 0.75 GR/GE kick-down switch X8507 pin 1 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 TR gearshift unit X8521 pin 4 0.5 SW gearshift unit X8521 pin 3 (oil temp. sensor) 0.5 GR/BR cluster X16 pin 5 (gearbox fault lamp) 6 RT B+ terminal point G6430, X6410 0.5 GE/WS program switch X8503 pin 1 (M) ground X6454 0.5 OR gearshift unit X8521 pin 5 (MV1) 0.5 BL gearshift unit X8521 pin 7 (MV5) 0.5 GN gearshift unit X8521 pin 6 (MV2) ground X6454 0.5 BL/SW selector switch X511 pin 4 (L1) 0.5 BL/WS selector switch X511 pin 6 (L3) 0.5 BR/GE DME X6000 pin 11 (throttle position) 0.5 SW DME engine speed (TD), splice X8015 0.5 WS/SW fuel consumption (TI), splice X8022 0.5 GE speed sensor X8516 pin 1 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 SW/BL A/C compressor line, splice X8056 0.5 BR/GR DME X6000 pin 64 0.5 VI gearshift unit X8521 pin 8 (solenoid feed) 0.5 TR gearshift unit X8521 pin 9 1.5 RT/WS DME relay K6300 pin 87, splice X6821 1.5 RT/WS DME relay K6300 pin 87, splice X6821 0.35 GE/BR cruise control X22 pin 7 (318is) 0.75 WS/GN diagnostic connector (programming) 0.35 SW DME X6000 pin 85 (CAN low) 0.35 GE DME X6000 pin 86 (CAN high) 0.5 WS/GE diagnostic link (RxD) 0.5 WS/VI diagnostic link (TxD) X8500 EGS control unit EGS A8500, 316i / 318i / 318is 4 Solenoid valve 4 5 Solenoid valve 3 6 Ground 8 Position switch L2 9 Position switch L4 10 Brake signal 12 S program 13 M program 14 Ground n-ab 15 Shield, speed sensor 17 S program 18 Kick-down 20 E program 21 Analog ground 22 Oil temperature sensor (+) 25 Fault indicator 26 B+ voltage 27 M program 28 Ground 30 Solenoid valve 1 32 Solenoid valve 5 33 Solenoid valve 2 34 Ground 36 Position switch L1 37 Position switch L3 38 Throttle valve position 40 Fuel consumption (TI signal) 41 Engine speed 42 Component supply n-ab 45 E program 46 Air conditioning ON signal 51 Engine speed 52 Power supply (+), solenoid valves 53 Solenoid valve 3 54 B+ voltage 55 B+ voltage 57 Cruise control (Tempomat) signal 60 Programming voltage 85 CAN-LOW 86 CAN-HIGH 87 RxD diagnostic link 88 TxD diagnostic link

How it works

The four-speed A4S 310R behind the four-cylinders. The EGS reads the selector lever (four code lines L1–L4), the program switch, kick-down, brake and engine data, and shifts with five solenoid valves in the gearshift unit.

Power comes from the DME relay (pins 54 and 55) and the battery feed on pin 26; it talks to the DME over CAN (85, 86).

Check on your car

  • The pin table swaps pins 40 and 41 (it calls 40 fuel consumption and 41 engine speed); the schematic draws 40 to the engine speed line and 41 to the fuel consumption line. Drawn as the schematic.

Redrawn from BMW ETM 2460.2 (05/99), standard petrol E36 (316i–328i); diesel and M3 parts are left out.

A4S 310R, six-cylinder: X8500

0.5 BR/VI shift lock Y19 X1178 pin 2 0.5 VI gearshift unit X8521 pin 2 (MV3) 0.5 GR gearshift unit X8521 pin 1 (pressure regulator) 0.5 BR/SW selector switch X511 pin 7 (L2) 0.5 BR/WS selector switch X511 pin 8 (L4) 0.5 BL/RT brake light switch S30 X78 pin 2 0.5 GE/GN program switch X8503 pin 7 (S) 0.5 GE/WS program switch X8503 pin 1 (M) 0.5 SW speed sensor X8516 pin 2 speed sensor shield 0.5 GE/GN program switch X8503 pin 7 (S) 0.75 GR/GE kick-down switch X8507 pin 1 0.5 WS/GN/GE ASC X1171 pin 6 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 SW gearshift unit X8521 pin 3 0.5 TR gearshift unit X8521 pin 4 (oil temp. sensor) 0.5 GR/BR cluster X16 pin 5 (gearbox fault lamp) 1 RT B+ terminal point, X6411 0.5 GE/WS program switch X8503 pin 1 (M) 1.5 BR/OR ground X6454 0.5 OR gearshift unit X8521 pin 5 (MV1) 0.5 BL gearshift unit X8521 pin 7 (lockup clutch) 0.5 GN gearshift unit X8521 pin 6 (MV2) 1.5 BR ground X6454 0.5 BL/SW selector switch X511 pin 4 (L1) 0.5 BL/WS selector switch X511 pin 6 (L3) 0.5 GE speed sensor X8516 pin 1 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 VI shift lock Y19 X1178 pin 1 0.75 RT gearshift unit X8521 pins 8 and 9 1.5 RT/WS DME relay K6300 pin 87, splice X6821 0.5 GE/BR cruise control X22 pin 7 0.5 GN/BL diagnostic connector (programming) 0.5 BL jumper to pin 83 0.5 BL jumper to pin 82 0.35 SW DME X6000 pin 85 (CAN low) 0.35 GE DME X6000 pin 86 (CAN high) 0.5 WS/VI diagnostic link (TxD) X8500 EGS control unit EGS A8500, 320i / 323i / 328i 2 Shift lock (+) 4 Solenoid valve 3 5 Pressure regulator (-) 8 Position switch L2 9 Position switch L4 10 Brake signal 12 S program 13 M program 14 Ground n-ab 15 Shield, speed sensor 17 S program 18 Kick-down 19 ASC signal 20 E program 21 Analog ground 22 Oil temperature sensor (+) 25 Fault indicator 26 B+ voltage 27 M program 28 Ground 30 Solenoid valve 1 32 Solenoid valve, converter lockup … 33 Solenoid valve 2 34 Ground 36 Position switch L1 37 Position switch L3 42 Component supply n-ab 45 E program 52 Shift lock (-) 53 Solenoid valves + 54 B+ voltage 57 Cruise control (Tempomat) signal 60 Programming voltage 82 Jumper 83 Jumper 85 CAN-LOW 86 CAN-HIGH 88 TxD diagnostic link

How it works

The same A4S 310R gearbox on the six-cylinders uses a different pin layout: three shift solenoids, a pressure regulator and a lockup clutch valve, plus the shift lock and the ASC link.

Redrawn from BMW ETM 2460.2 (05/99), standard petrol E36 (316i–328i); diesel and M3 parts are left out.

A5S 310Z: X7000

0.5 BR/VI shift lock Y19 X1178 pin 2 0.5 RS gearshift unit X8505 pin 7 (MV5) 0.5 TR/SW gearshift unit X8505 pin 11 (lockup clutch) 0.5 RT gearshift unit X8505 pin 2 (pressure regulator) 0.5 BR/SW selector switch X511 pin 7 (L2) 0.5 BR/WS selector switch X511 pin 8 (L4) 0.5 BL/RT brake light switch S30 X78 pin 2 0.5 GE/GN program switch X8503 pin 7 (S) 0.5 GE/WS program switch X8503 pin 1 (✱ program) 0.35 BR gearshift unit X8505 pin 6 (output speed −) speed sensor shield 0.35 BL gearshift unit X8505 pin 1 (turbine speed +) 0.5 GE/GN program switch X8503 pin 7 (S) 0.75 GR/GE kick-down switch X8507 pin 1 0.5 WS/GN/GE ASC X1171 pin 6 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 SW/BL gearshift unit X8505 pin 14 0.5 SW/RT gearshift unit X8505 pin 12 (oil temp. sensor) speed sensor shield 0.5 GR/BR cluster X16 pin 5 (gearbox fault lamp) 1 RT B+ terminal point, X6411 0.5 GE/WS program switch X8503 pin 1 (✱ program) 1.5 BR/OR ground X6454 0.5 OR gearshift unit X8505 pin 8 (MV1) 0.5 SW gearshift unit X8505 pin 3 (MV4) 0.5 GE gearshift unit X8505 pin 4 (MV3) 0.5 GN gearshift unit X8505 pin 9 (MV2) 1.5 BR ground X6454 0.5 BL/SW selector switch X511 pin 4 (L1) 0.5 BL/WS selector switch X511 pin 6 (L3) 0.35 WS gearshift unit X8505 pin 5 (output speed +) 0.35 GR gearshift unit X8505 pin 10 (turbine speed −) 0.5 GE/BL program switch X8503 pin 10 (E) 0.35 BR/GR brake test contact, X78 pin 3 0.5 VI shift lock Y19 X1178 pin 1 0.75 VI gearshift unit X8505 pin 13 (solenoid feed) 1.5 RT/SW DME relay K6300 pin 87, splice X6821 0.5 GE/BR cruise control X22 pin 7 0.75 WS/GN DME pin 60 / diagnostic connector X6002 pin 18 0.5 BL jumper to pin 83 0.5 BL jumper to pin 82 0.35 SW DME X6000 pin 85 (CAN low) 0.35 GE DME X6000 pin 86 (CAN high) 0.5 WS/VI diagnostic link (TxD) X7000 EGS control unit EGS A7000, A5S 310Z 2 Shift lock (+) 3 Solenoid valve 5 4 Solenoid valve, converter lockup … 5 Pressure regulator (-) 8 Position switch L2 9 Position switch L4 10 Brake signal 12 S program 13 * program 14 Speed sensor n-ab (-) 15 Shield, speed sensor 16 Speed sensor, n-turbine (+) 17 S program 18 Kick-down signal 19 ASC signal 20 E program 21 Ground, oil temperature sensor 22 Oil temperature sensor, NTC 23 Shield for speed sensor 25 Fault indicator 26 Terminal 30 27 * program 28 Ground, electronics 30 Solenoid valve 1 31 Solenoid valve 4 32 Solenoid valve 3 33 Solenoid valve 2 34 Power ground 36 Position switch L1 37 Position switch L3 42 Speed sensor n-ab (+) 44 Turbine speed sensor (-) 45 E program 48 Brake test signal 52 Shift lock (-) 53 Positive supply, solenoid valves 54 B+ voltage 57 Cruise control (Tempomat) signal 60 Programming voltage 82 Jumper 83 Jumper 85 CANCA-LOW 86 CANCA-HIGH 88 TxD diagnostic link

How it works

The five-speed A5S 310Z: two speed sensors (turbine and output), five shift solenoids, a pressure regulator and the lockup clutch valve, all fed from pin 53.

Redrawn from BMW ETM 2460.4 (05/99), standard petrol E36 (316i–328i); diesel and M3 parts are left out.

A5S 300J (M52): X7000

0.5 BR/VI shift lock Y19 X1178 pin 2 0.5 VI transmission switch X8551 pin 10 (R-lock) 0.5 RT transmission switch X8551 pin 4 (lockup clutch) 0.75 BR transmission switch X8551 pin 8 (main pressure) ground X6454 0.5 BR/SW selector switch X511 pin 7 (L2) 0.5 BR/WS selector switch X511 pin 8 (L4) 0.5 BL/RT brake light switch S30 X78 pin 2 0.5 GE/GN program switch X8503 pin 7 (S) 0.5 GE/WS program switch X8503 pin 1 (✱ program) 0.5 GE speed sensor X8516 pin 2 speed sensor shield 0.5 GE/GN program switch X8503 pin 7 (S) 0.75 GR/GE kick-down switch X8507 pin 1 0.5 WS/GN/GE ASC X1171 pin 6 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 BL transmission switch X8551 pin 3 0.5 WS transmission switch X8551 pin 2 (oil temp. sensor) 0.5 GR/BR cluster X16 pin 5 (gearbox fault lamp) 1 RT B+ terminal point, X6411 0.5 GE/WS program switch X8503 pin 1 (✱ program) 1.5 BR/OR ground X6454 0.75 GR transmission switch X8551 pin 5 (valve A) 0.5 SW transmission switch X8551 pin 1 (overdrive) 0.5 OR transmission switch X8551 pin 7 (valve C) 0.75 GN transmission switch X8551 pin 6 (valve B) 1.5 BR ground X6454 0.5 BL/SW selector switch X511 pin 4 (L1) 0.5 BL/WS selector switch X511 pin 6 (L3) 0.5 SW speed sensor X8516 pin 1 0.5 GE/BL program switch X8503 pin 10 (E) 0.5 BR/GR brake test contact, X78 pin 3 0.5 VI shift lock Y19 X1178 pin 1 1 BR/VI transmission switch X8551 pin 9 (solenoid feed) 1.5 RT/WS DME relay K6300 pin 87, splice X6821 0.5 GE/BR cruise control X22 pin 7 0.5 GN/BL DME pin 60 / diagnostic connector X6002 pin 18 0.5 BL jumper to pin 83 0.5 BL jumper to pin 82 0.35 SW DME X6000 pin 85 (CAN low) 0.35 GE DME X6000 pin 86 (CAN high) 0.5 WS/VI diagnostic link (TxD) X7000 EGS control unit EGS A7000, A5S 300J (M52) 2 Shift lock (+) 3 Solenoid valve, R-lock 4 Solenoid valve, converter lockup … 5 Solenoid valve, main pressure 6 Ground 8 Position switch L2 9 Position switch L4 10 Brake signal 12 S program 13 * program 14 Speed sensor n-ab (-) 15 Shield, speed sensor 17 S program 18 Kick-down signal 19 ASC signal 20 E program 21 Ground, oil temperature sensor 22 Oil temperature sensor, NTC 25 Fault indicator 26 Terminal 30 27 * program 28 Ground, electronics 30 Solenoid valve A 31 Solenoid valve, overdrive 32 Solenoid valve C 33 Solenoid valve B 34 Power ground 36 Position switch L1 37 Position switch L3 42 Speed sensor n-ab (+) 45 E program 48 Brake test signal 52 Shift lock (-) 53 Positive supply, solenoid valves 54 B+ voltage 57 Cruise control (Tempomat) signal 60 Programming voltage 82 Jumper 83 Jumper 85 CANCA-LOW 86 CANCA-HIGH 88 TxD diagnostic link

How it works

The five-speed A5S 300J used with the M52: shift valves A, B and C, overdrive, R-lock, main pressure and lockup clutch valves in the transmission switch, one output speed sensor.

Redrawn from BMW ETM 2460.11 (05/99), standard petrol E36 (316i–328i); diesel and M3 parts are left out.

Reading the wire codes

BMW labels every wire with its size and colour, for example 2.5 SW/GE: 2.5 mm², black (schwarz) with a yellow (gelb) stripe. Connectors are numbered X…, followed by the pin. The wires in these diagrams are drawn at relative thickness, so the 25 mm² battery cable stands out from a 0.35 mm² signal wire.

Codes used here: SW = black, RT = red, GN = green, BL = blue, GE = yellow, BR = brown, WS = white.