J1850-VPWM ECU-Simulator v2.00 www.ozenelektronik.

com

Features

• Simulate ECM , TCM and ABS ECUs

• More than 3 DTCs
• MIL LED output
• Fixed and variable PIDs
• Hardware compatible with 90c1300
• OBD MODE 1,2,3,4,7,9
• Freeze Frame reading

J1850 VPWM
MULTIPLE ECU
simulator according
to SAE J1979
Description

OE91C1310 can simulate ECM ( engine ECU

OE91C1310
address 0x10 ) , TCM ( transmission control ECU
address 0x18 ) and ABS ECU address 0x28
simultaneously.
It is compatible with OE90C1300. 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.
The OE91C1310 communicate at 10.4 kbaud.
AIN2-O2V
AIN1-MAF
CLKOUT
GND
VREF
VCC
NC

28
27
26
4
3
2
1

NC 5 25 VPWM-IN
MIL 6 24 VPWM-OUT
NC 7 23 AIN5-SPD
NC 8 22 AIN6-RPM
PLCC-28
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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 J1850-VPWM ECU-Simulator v2.00 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 DTC I A low on this output generates 3 DTC
11 NC
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 AN6 I Analog canal 6 input
23 AN5 I Analog canal 5 input
24 VPWM-Out O Output VPWM
25 VPWM-In I Input VPWM
26 AN2 I Analog canal 2 input
27 AN1 I Analog canal 1 input
28 CLKOUT O Clock output for RS232 baud rate in

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 J1850-VPWM ECU-Simulator v2.00 www.ozenelektronik.com

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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 J1850-VPWM ECU-Simulator v2.00 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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 J1850-VPWM ECU-Simulator v2.00 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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 J1850-VPWM ECU-Simulator v2.00 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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 J1850-VPWM ECU-Simulator v2.00 www.ozenelektronik.com

Application notes

VCC
VCC

2k
connected
MIL
DTCs
1k
13 6 1k
5X10K 14 NC LED1 20
NC LED2
11 28
12 DTC CLKOUT
10 NC 9
NC BAUDIN
1
21 VREF 25
AIN7 VPWM-IN VPWM-IN
22 24
AIN6 VPWM-OUT VPWM-OUT
23
26 AIN5
27 AIN2
AIN1

15 8
16M XTAL2 NC
16 7
XTAL1 NC
27pF 27pF 19
RST 2
3 GND
17 VCC 18
VCC GND

1uF OE91C1300
+

VCC

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

• close jumper to download a new release.
• Don’t change the value of crystal.

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 J1850-VPWM ECU-Simulator v2.00 www.ozenelektronik.com

8V 8V

VBAT
1k1
3k

8
JP2
3 + LM393 4k7
TXVPWM 2 1
1
2 - 2N3906 4 3
6 5
8 7
3k9 10 9

4
1N4148 12 11
14 13
16 15

OBD CONNECTOR

LM393

- 6
7 10k
RXVPWM
+ 5

VBAT

LM7805C/TO220
3 1
GND

VCC OUT IN

1N4001
100nF 100nF
2

U6
LM7808/TO220
3 1
GND

8V OUT IN

100nF
2

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