ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.

com

Features

• Simulate ECM , TCM and ABS ECUs

• More than 3 DTCs
• MIL LED output
• 10 mS interbyte time
• Fixed and variable PIDs
• Hardware compatible with 90c1000
• 5 Baud init process ISO 9141-2
• OBD MODE 1,2,3,4,7,9 MULTIPLE-ECU
• Freeze Frame reading simulator
according to SAE
J1979 and ISO15031

Description
OE91C1010
OE91C1010 can simulate ECM ( engine ECU
address 0x10 ) , TCM ( transmission control ECU
address 0x18 ) and ABS ECU address 0x28
simultaneously. It is compatible with OE91C1000.
EOBD modes (1,2,3,4,7,9 ) are implemented.
Each ECU has own PID table and variable PID can
be changed via potentiometers. The ECM can
generate more than 3 DTCs. OE91C1010 works at
10400 baud with keywords 08,08.
AIN1-MAF
CLKOUT

TXISO
GND
VREF
VCC
NC

28
27
26
4
3
2
1

NC 5 25 AIN3-O2V
MIL 6 24 AIN4-RPM
NC 7 23 AIN5-SPD
NC 8 PLCC-28 22 RXISO
BAUDIN 9 21 AIN7-TMP
NC 10 20 CONN
DTC 11 19 RESET
12
13
14
15
16
17
18
GND
NC

VCC
NC
NC
XTAL2
XTAL1

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

Pin description

Pin Pin Name Type Description

1 VREF I 2.5 V extern ref input for ADC
2 GND Ground
3 VCC Supply voltage
4 NC
5 NC
6 MIL O MIL LED max 5 mA for low current LED
7 NC
8 NC
9 BAUDIN * 16 x RS232 Baudrate input clock
10 NC
11 DTC I A low on this input generates 3 DTCs
12 NC
13 NC
14 NC
15 XTAL2 I 16 Mhz crystal input
16 XTAL1 I 16 MHz crystal input
17 VCC Supply voltage
18 GND I Ground
19 RESET I/O A high level on this pin during 2 machine cycles
while the oscillator is running resets the device.
20 LED2 O LED output to indicate ECU connected to tester
21 AN7 I Analog canal 7 input
22 RXISO I Đnput ISO receiver
23 AN5 I Analog canal 5 input
24 AN4 I Analog canal 4 input
25 AN3 I Analog canal 3 input
26 TXISO O Output ISO K-Line
27 AN1 I Analog canal 1 input
28 CLKOUT * O Clock output for RS232 baud rate in

* Pins 28 and 9 must be tied together

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

This simulator chip should be initialized at 5 Baud by receiving 0x33 according to

ISO9141-2. The succesfully connection is indicated by Green LED.
Once initialized when no activity is detected on ISO BUS during 5 sec. The
connection is interrupted and the green LED goes OFF. Any of not implemented
PID gives no response.

ECM ( engine control modul 0x10 )

Mode 1

PID Description fixed Raw Value Var. Raw Value

03 Fuel system status 00 -
04 Engine Load 50
05 ECT 0..255
06 STFT 1 60
07 LTFT 1 70
0C RPM 0..65535
0D VSS 0..255
0F IAT 45
10 MAF 0...65535
13 Location of O2 sensors Bank 1 sensor 1 -
14 O2 volt 0..255
1C OBD Type EOBD -
1F Time since motor start increments after
simulator power
on.
21 Distance traveled increments while
MIL LED is active
2F FLI 100
33 BARO 102
42 Control voltage 12000
46 AAT 75

Mode 2

when the DTC input is low , P0100 cause a freeze frame storage as follow :

PID Description Stored Value

05 Engine coolant temp. 40
0C Engine RPM 1234
0D Vehicle speed sensor 67

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

Mode 3

If DTC button input is low , the MIL LED will be active and the DTCs for , mode
2 , mode 3 and 7 are generated.
when requesting this MODE the 6 DTCs come from ECM P0100 , P0200 , P0300 ,
U0100 , B0200 , C0300

Mode 4

delete the DTCs and freeze frame storage datas. MIL LED turns off.

Mode 7

While MIL LED is active , when requesting this MODE the 3 DTCs come from ECM
P0107 , P0207 , P0307

Mode 9

Infotypes 1 and 2 are implemented . when requesting VIN Number the response
is
VIN#=OZENELEKTRONIK123

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

TCM ( transmission control modul 0x18 )

Mode 1

PID Description fixed Raw Value Var. Raw Value

05 Engine coolant temp. 0..255
0C Engine RPM 0..65535
0D Speed 0..255
1C OBD Type EOBD -

Mode 2

Not implemented

Mode 3

While MIL LED is active , when requesting this MODE the 1 DTCs come from TCM
P0101

Mode 4

delete the DTC . MIL LED turns off.

Mode 7

While MIL LED is active , when requesting this MODE the 2 DTCs come from
TCM . P0102 , U1600

Mode 9

Not implemented

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

ABS ( ABS modul 0x28 )

Mode 1

PID Description fixed Raw Value Var. Raw Value

0D Speed 0..255
1C OBD Type EOBD -

Mode 2

Not implemented

Mode 3

No DTC

Mode 4

No DTC

Mode 7

While MIL LED is active , 1 DTCs come from ABS ( B2245 )

Mode 9

Not implemented

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

Application notes

VCC
VCC

2k
connected
MIL
DTCs
1k
13 6 1k
5X10K 14 NC LED1 20
NC LED2
11 28
8 DTC CLKOUT
10 NC 9
7 NC BAUDIN
1 NC
21 VREF 26
AIN7 TXISO TXK
23 22
AIN5 RXISO RXK
24
25 AIN4
27 AIN3
12 AIN1
NC

15
16M XTAL2 2
16 GND 18
XTAL1 GND
27pF 27pF 19
RST
3
17 VCC OE91C1000
VCC

1uF
+

VCC

• the both LEDs are low current If < 5 mA.

• Don’t change the value of crystal.

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 ISO 9141-2 ECU Simulator v2.0 www.ozenelektronik.com

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
2N2222

VBAT FEMAL OBD CONN.

VBAT

4K7
TXK 8 10K
+ 3 10K
1
RXK
- 2

U2A
LM393 10K
4

VBAT

LM7805C/TO220 1N4001
3 1
GND

VCC OUT IN

100nF 100nF
2

• use a 12 VDC / 500 mA Adapter to power the simulator and the tester.
• A femal OBD connector must be used.

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