TRANSMISSION CONTROL SYSTEM VERSION

IDENTIFICATION BY MODEL
Automatic Transmissions and control system technology has evolved through the model
years. The evolution is due to continued refinement and total vehicle system communica-
tion integration. Same version transmission control systems in many cases are different
from vehicle to vehicle increasing the total number of system variations.

Version ID - 1
4HP 24 EH

4HP 22 EH transmissions were the first electronic controlled transmissions on BMW vehi-
cles in the US market. The 1986 model year 535i, 635i and 735i vehicles where equipped
with the first version control system identified as E7. Through the lifespan of the transmis-
sion two additional control systems where phased in (late E7 and E9). The 4HP 24 trans-
mission was introduced in 1988 with the debut of the 750iL (E32).

Control Vehicle Engine Year

Identical in function to the 4HP 22, the 4HP 24 was
System designed to handle the higher torque output of the M70
GS 1.27 750iL, 850i M70 1988-91 V12 engine. Components where changed and/or modi-
GS 1.29 750iL, 850i M70 1992-94 fied providing the higher torque rating. Refer to TRI 24 01
87 for introductory information.

This course (ST057) will only cover the E9 ver-

sion of the 4HP 24 EH transmission. For addi-
tional, diagnosis and troubleshooting information
on 4HP 22 & 24 EH transmissions, refer to
Understanding AEGS (SD 89-20).

SYSTEM FEATURES:

• 35 Pin Control Module

• Adaptive Hydraulic Pressure Control
• Torque Converter Lock Up Control (on/off).
• Reverse Lock out Function
• Downshift Protection
• Shift solenoid control (all freewheel shifts)
• Shift lock solenoid control
• 3 Shift programs:
- Economy
- Sport
- Manual
• Output signal generation of:
- Torque reduction during upshifts
- Torque converter lock status
- Sport mode active, request progressive
throttle curve request to EML
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis

OUTPUT RATIOS: 1st gear 2.40:1

2nd gear 1.46:1
3rd gear 1.00:1
4th gear 0.72:1
Version ID - 2 Reverse 2.00:1
 KL30
4HP24 EKM MID
(E9) FAULT FAULT
DISPLAY
GS 1.29 PROGRAM PROGRAM

ECM
Main
Relay TORQUE REDUCTION
87a DME
RANGE I
+ SELECTOR
SWITCH
DME
II

TORQUE CONVERTER LOCK UP

EKM
"M"
SHIFT
LOCK
PROG
SWITCH

+ MV 2
"A"
VALVE
BRAKE LIGHT BODY
SWITCH
POWER TC LOCK
BRAKE TEST UP (MV3)
MV 1
SWITCH EDS

THROTTLE POSITION
EML
DIAGNOSIS
KICK DOWN

TR
DME TI

DIS
iC
MoD

MoDiC
SHIFT INTERVENTION
ASC
SPORT PROGRAM
EML

OUTPUT SPEED SIGNAL

Version ID - 3
A4S 310R

Control Vehicle Engine Year Introduced as the THM R1 on the 1990 525i, the trans-
System mission was later identified as the A4S 310R following
GS4.14 525i, M50 1991-92 BMW’s new transmission ID convention. This transmis-
GS4.16 525i,it M50TU 1993-95
318i,is,iC,ti M42 1992-95
sion was the first GM transmission used on BMW vehi-
GS4.14 325i,is, M50 1992 cles for the US. The transmission control system is
GS4.16 325i,is,iC M50TU 1993-95 manufactured by Bosch to BMW specifications. Refer
to TRI 24 01 90 for introductory information.

SYSTEM FEATURES:

• 55 Pin Control Module

• Adaptive Hydraulic Pressure
Control
• Torque Converter Lock Up
Control (on/off).
• Reverse Lock out Function
• Downshift Protection
• Shift solenoid control (all free-
wheel shifts)
• Shift lock solenoid control
• Downshift Inhibit control
• 3 Shift programs:
- Economy
- Sport
- Manual
• Output signal generation of:
- Torque reduction during upshifts
- Torque converter lock status
• Warm Up phase program
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis

OUTPUT RATIOS: 1st gear 2.40:1

2nd gear 1.46:1
3rd gear 1.00:1
4th gear 0.72:1
Reverse 2.00:1

Version ID - 4
 A4S 310R FAULT INDICATOR
GS 4.16 E36/E34
E36/E34
ECM
Main RANGE AND PROGRAM
Relay E34

+
RANGE SEL
SHIFT LOCK

ME
DME

DIAGNOSIS
PROG SWITCH

iC
MoD
MoDiC DIS

KICK DOWN

+
BRAKE AND
BRAKE TEST

DKV
Ti
TD PRESSURE
DME
COMPRESSOR ON E36 REGULATOR
MV 1

TORQUE VALVE BODY

CONVERTER
BRAKE
A/C COMPRESSOR BAND
MV 2
A/C ON E34 SOLENOID
IHKR
LOCKUP
OIL TEMP SOLENOID
OUTPUT SPEED

Version ID - 5
A4S 270R

Control Vehicle Engine Year The A4S 270R transmission is identical in mechanical
System function and component layout as the A4S 310R.
GS 8.34 528i (E39) M52, 1997
318i,is,iC M44 1996-97
Z3 1.9, 318ti M44 1996-98
The change to the 270R designation is the result of
328i,is,iC M52 1996-98 design changes of the Ravigneaux planetary gear set
323is,iC M52 1998 which modified the output ratios as well as reducing it’s
Z3 2.8 M52 1997-
torque rating.
All A4S 270R transmissions are
controlled by an 88 pin control
module.

Power stage control of the valve body solenoids was

changed from switched power to switched ground.

Additionally, the 528i E39 is equipped with an AGS ver-

sion of the TCM which added four wheel speed input
signals to the system.

SYSTEM FEATURES:

• 88 Pin Control Module

• Adaptive Hydraulic Pressure Control
• Torque Converter Lock Up
Control (on/off).
• Reverse Lock out Function
• Shift solenoid control (all free-
wheel shifts)
• Shift lock solenoid control
• Downshift Inhibit control
• Warm up phase program
• 3 Shift programs:
- Economy
- Sport
- Manual
• CAN communication with DME
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis

OUTPUT RATIOS: 1st gear 2.86:1 Service Note:

2nd gear 1.62:1 The A4S 270R is identified as the previ-
3rd gear 1.00:1 ous A4S 310R in Parts and ETM
4th gear 0.72:1 Publications. THM R1 transmissions
Reverse 2.00:1 after 1-96 are in fact the A4S 270R.
Version ID - 6
 A4S 270R E36: FAULT
GS 8.34 INDICATION

E39 ONLY: INSTRUMENT

CLUSTER DATA LINK

+
RANGE SEL
SHIFT LOCK
+

DIAGNOSIS &
PROGRAMMING
PROG SWITCH

DIS

iC
MoD
MoDiC

KICK DOWN

+
BRAKE AND
BRAKE TEST

DME CAN PRESSURE

REGULATOR MV 1

SHIFT INTERVENTION

ASC *WHEEL SPEED SIGNALS 4x VALVE BODY

*=E39 only BRAKE

MV 2 BAND
CRUISE ACTIVE SOLENOID
GR II TORQUE
CONVERTER
LOCK UP

OUTPUT SPEED

OIL TEMP

Version ID - 7
A5S 360R (GM 5)

Control Vehicle Engine Year Introduced with the E46, the A5S 360R provides the 3
System series line of vehicles with a 5 speed transmission.
GS 20 528i (E39) M52 TU 1999-
328i (E46) M52 TU 1999-
323i (E46) M52 TU 1999-
The new GS 20 control system is designed and manu-
factured via a joint effort with BMW, Siemens and GM.
SYSTEM FEATURES:

• Torque rating of 360Nm.

• Gradual torque converter lock
up providing a controlled degree
of clutch slippage and smooth
transition to full lock.
• Torque converter variable lock
up control can occur in 3rd, 4th
and 5th gears.
• AGS shift program logic
• 134 pin SKE control module
• Adaptive Hydraulic Pressure
Control
• Reverse Lock out Function
• Shift solenoid BMW PRODUCTION LINE
LABEL
control (all
freewheel
IDENTIFICATION LABEL:
shifts).
• Shift lock • BMW Part Number
solenoid • Version Identification
control • Software Level
• Downshift • Production Date
Inhibit control • Serial Number
• Failsafe • Siemens Part Number
Operation • GM Part Number
(Emergency Program)
• CAN communication with all drivetrain control modules and the instrument cluster. This
feature reduces individual signal circuits dramatically and improves improves reliability.
• DIS/MoDiC communication for Diagnosis and Programming.

OUTPUT RATIOS: 1st gear 3.45:1

2nd gear 2.21:1
3rd gear 1.59:1
4th gear 1.00:1
5th gear 0.76:1
Reverse -3.16:1
Version ID - 8
 BACK UP LIGHTS
CONTROL RELAY
TCM
ENGINE CONTROL POWER KL 87 TO BACK UP LIGHTS
(GS 20) & REVERSE SIGNAL
(PDC, NAV, Electro-
chromatic rearview mirror)

SHIFT LOCK
KICK DOWN

MS42 MK20
EI

BRAKE LIGHT CAN

SWITCH
BRAKE TEST
SWITCH P/N SIGNAL
TO EWS 3.3

20 SHIFT VALVE "A" (MV1)

DIAGNOSIS &
PROGRAMMING

10 SHIFT VALVE "B" (MV2)

iC
MoD

DIS MoDiC
9 SHIFT VALVE "C" (MV3)

3 VALVE BODY POWER

HSD2
+

RANGE C
6
SELECTION
SWITCH TC LOCK UP
SUPPLY B
REGULATOR
VALVE BODY
11 A
+
8 MAIN
TRANS.
INPUT S PRESSURE
SPEED REGUALTOR

TRANS.
OIL TEMP.

TRANS.
OUTPUT S

SPEED

Version ID - 9
A5S 310Z

Control Vehicle Engine Year Introduced to the US market in 1993, the A5S 310Z
System was a lighter duty alternative to the A5S 560Z as
GS 7.3 530i, it (E34) M60 1993 well as suitably matched to the torque rating for the
GS 7.32 530i, it (E34) M60 1994-95 3 liter M60 V8 engine and S50/52 M3 engine. Refer
GS 7.11 M3 (E36) S50 US 1995
GS 8.32 M3 (E36) S52 1996- to TRI 24 01 93 for introductory information.

SYSTEM FEATURES:

• 88 Pin Control Module

• AGS shift program logic controlled
(from 1994 model year)
• Adaptive Hydraulic Pressure Control
• Torque Converter Lock Up Control
(On/Off).
• Reverse Lock out Function
• Downshift protection
• Shift solenoid control (freewheel and
overlap shift technology)
• PWM controlled pressure regulation
solenoids
• Shift lock solenoid control
• Downshift Inhibit control
• 3 Shift programs:
- Economy
- Sport
- Manual
• CAN communication with DME (excluding GS 7.11)
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis

OUTPUT RATIOS: 1st gear 3.665:1

2nd gear 1.990:1
3rd gear 1.407:1
4th gear 1.000:1
5th gear 0.742:1
Reverse -4.080:1

Version ID - 10
 A5S 310Z
FAULT INDICATOR
GS 8.32
+
ECM MAIN
RELAY
(KL 87a)
+
RANGE SEL DIAGNOSIS

DIS

iC
MoD
MoDiC

PROGRAM
SWITCH SHIFT LOCK
"A"
"M"
"S"

KICK DOWN

+
BRAKE VALVE BODY
SWITCH
ASC

MV1
ASC -- ON/OFF
ASC SHIFT INTERVENTION MV3

MV4
SHIFT REQUEST
GR II
CAN MV2

DME MV5

OIL TEMP
MV6
EDS
INPUT SPEED

OUTPUT SPEED

Version ID - 11
 A5S 310Z
FAULT INDICATOR
GS 7.32
+
ECM MAIN
RELAY
(KL 87a)
+
RANGE SEL DIAGNOSIS

DIS

iC
MoD
MoDiC

PROGRAM
SWITCH SHIFT LOCK
"A"
"M"

KICK DOWN

+
BRAKE VALVE BODY
SWITCH
ASC

MV1
ASC -- ON/OFF
ASC SHIFT INTERVENTION MV3
WHEEL SPEED SIGNALS
MV4

MV2
SHIFT REQUEST MV5
GR II
CAN
DME MV6
EDS

OIL TEMP
INPUT SPEED
OUTPUT SPEED

Version ID - 12
Version ID - 13
A5S 440Z

Control Vehicle Engine Year Introduced in 1997 as a lighter weight,

System lower cost alternative to the A5S 560Z,
GS 8.55 840Ci M62 1997 (from 9/96 prod) the A5S 440Z is suitably matched to the
(Index 50) 540i M62 1997 (from 1/97 prod)
740i/iL M62 1997 (from 1/97-4/97)
size and power output of the M62 V8
engine.
GS 8.55 740i/iL M62 1997 (from 5/97 prod)
(Index 60)
GS 8.60 was also the first control system
GS 8.60.2 740i/iL M62 1998 - to utilize the SKE control module hardware
(Index 60) 540i M62 1998 - enclosure.

SYSTEM FEATURES:

• 88 Pin Control Module (97MY)

• 134 Pin SKE control module (98MY)
• AGS shift program logic controlled
• Adaptive Hydraulic Pressure Control
• Gradual (PWM) Torque Converter
Lock Up Control.
• Reverse Lock out Function
• Downshift Protection
• Shift solenoid control (freewheel
shifts and overlap shift technology)
• Shift lock solenoid control
• Manual downshift and kickdown
Inhibit control
• 3 Shift programs:
- Economy
- Sport
- Manual
• Steptronic capable.
• CAN communication with all drivetrain control modules and the instrument cluster.
This feature reduces individual signal circuits dramatically and improves reliability.
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis
• Maintenance Free Lifetime operation
• Semi-synthetic lifetime oil: ESSO LT71141

OUTPUT RATIOS: 1st gear 3.57:1

2nd gear 2.20:1
3rd gear 1.51:1
4th gear 1.00:1
5th gear 0.80:1
Version ID - 14 Reverse -4.095:1
 A5S 440Z RANGE DISPLAY
PROGRAM DISPLAY
GS 8.55
GS 8.60.2
ECM DIAGNOSIS -- PROGRAMMING
Main
Relay
M62
87a + RANGE

DIS

iC
MoD
MoDiC

SHIFT LOCK

MV 3

MANUAL GATE MV 2

STEPTRONIC
CAN
TERMINATING
RESISTOR

WITHOUT
PROG SWITCH STEPTRONIC
E38-E31*

KICK DOWN MV 1
SWITCH
EDS 5
+
EDS 2
HALL EFFECT
BRAKE PEDAL
SENSOR EDS 3

8.55 (CAN 60) EDS 4

8,60.2 EDS 1

ASC DME

CAN

WHEEL POWER
SPEED
SIGNALS

OIL TEMP

INPUT SPEED

OUTPUT SPEED VALVE BODY

Version ID - 15
A5S 560Z
Control Vehicle Engine Year Developed for high output engines, the A5S 560Z
System is suitably matched to the large displacement
GS 9.2 740i/iL (E32) M60 1993-94 BMW V8 (M60 & M62) and V12 (M73) engines.
540i (E34) M60 1993

GS 9.22 540i M60 1994-95 The A5S 560Z was also the first overlap shift
840Ci M60 1994-95 transmission for BMW. All ZF transmissions since
740i/iL (E38) M60 1995 the the introduction of the A5S 560Z have been
GS 9.22.1 750iL M73 1995- overlap shifting transmissions.
740i/iL M62 1996 -
840Ci M62 1996-97 Since the introduction of the A5S 440Z the A5S
850Ci M73 1996-97
560Z is reserved for M73 engine applications only.

SYSTEM FEATURES:

• 88 Pin Control Module

• AGS shift program logic controlled
• Adaptive Hydraulic Pressure Control
• Gradual (PWM) Torque Converter
Lock Up Control.
• Reverse Lock out Function
• Downshift Protection
• Shift solenoid control (freewheel and
overlap shift technology)
• Shift lock solenoid control
• Downshift Inhibit control
• 3 Shift programs:
- Economy
- Sport
- Manual
• Steptronic capable
• CAN communication with all drivetrain control modules and the instrument cluster.
This feature reduces individual signal circuits dramatically and improves reliability.
• Failsafe Operation (Emergency Program)
• DIS/MoDiC communication for Diagnosis
• Maintenance Free Lifetime operation
• Semi-synthetic lifetime oil: ESSO LT71141

OUTPUT RATIOS: 1st gear 3.55:1

2nd gear 2.24:1
3rd gear 1.54:1
4th gear 1.00:1
5th gear 0.79:1
Reverse -3.68:1

Version ID - 16
 A5S 560Z RANGE DISPLAY
PROGRAM DISPLAY
GS 9.2 (EGS)
GS 9.22 (AGS)
ECM DIAGNOSIS -- PROGRAMMING
Main UP TO 12-94
Relay
87a M60
DIS

iC
MoD
+ RANGE MoDiC

SHIFT LOCK

MV 3
MV 2

CAN
TERMINATING
RESISTOR
PROG SWITCH
E38-E31*

KICK DOWN
SWITCH
E38 +
MV 1
HALL EFFECT
BRAKE PEDAL EDS 5
SENSOR
EDS 2
+
BRAKE AND
BRAKE TEST EDS 3
EDS 4
EDS 1
ASC

ASC DME

ASC -- ON/OFF
CAN

SHIFT INTERVENTION POWER

WHEEL SPEED SIGNALS

VALVE BODY

OUTPUT SPEED
INPUT SPEED

OIL TEMP

Version ID - 17
 A5S 560Z RANGE DISPLAY
PROGRAM DISPLAY
GS 9.22.1
(AGS)
ECM DIAGNOSIS -- PROGRAMMING
Main FROM 1995
Relay
87a + RANGE M73
M62
DIS

iC
MoD
MoDiC

SHIFT LOCK

MV 3

MANUAL GATE MV 2

STEPTRONIC
CAN
TERMINATING
RESISTOR

WITHOUT
STEPTRONIC
PROG SWITCH
E38-E31*

KICK DOWN MV 1
SWITCH
EDS 5
+ EDS 2
HALL EFFECT
BRAKE PEDAL
SENSOR EDS 3
EDS 4
850i/ 850i/ EDS 1
750iL 750iL

ASC DME DME II EML IIIs

CAN CAN

WHEEL 1998 POWER

SPEED
SIGNALS

VALVE BODY

OUTPUT SPEED
INPUT SPEED

OIL TEMP

Version ID - 18
CONTROL SYSTEM
IDENTIFICATION GETRIEBESTEURUNG

The control system is accurately

identified by electronic display on the
DIS/MoDiC and by a visual check on
the control module.

Always confirm the identification

against possible part number supers-
ession by checking the EPC for the
specific transmission. Troubleshooting by means of
perciptible symptoms: "#"
EGS IDENTIFICATION:
Example: “KP” identifier on: EGS: GS 9.20
E32 740i US KP
5-Speed Automatic Transmission
A5S 560Z (5HP-30)
BMW Hardware Number 1421006
• Control module label Production Code
Version Number
662
0000100920
• Control module ID page Bosch Number
Software Number
0260002262
3337633051
• EPC part description Serial Number
ZF Number
C2425X
0000701213

Version ID - 19
TRANSMISSION IDENTIFICATION

The transmission identification plate also offers valuable parts ordering information. Similar
to the control system, the transmission itself is always subject to changes due to refine-
ments in its valve body, clutches, electrical components, etc.

Prior to parts ordering always verify what part is

being replaced by checking the data plate and
compare it with the EPC for possible superses-
sion.

In this example, the original equipment had been

upgraded and reidentified by a new 2 character
code.

OLD

NEW

Version ID - 20