Tag Archive 'obd1'

Jul 11 2008

OBD1 Honda/Acura ECU Pinouts

Published by Benjamin Jones under Tech Info

KOEO = Key on; Engine OFF
KOER = Key on; Engine Running

Pin
Function
Color
Voltage
A1
INJ1
Brown
Battery Voltage with KOEO
A2
INJ4
Yellow
Battery Voltage with KOEO
A3
INJ2
Red
Battery Voltage with KOEO
A4
VTS – VTEC Solenoid
Green/Yellow
N/A
A5
INJ3
Blue
Battery Voltage with KOEO
A6
PO2SHTC – O2 Sensor Heating Element
Orange/White
Battery Voltage with KOEO
A7
FLR1- Fuel Pump
Green/Black
Battery Voltage with KOEO
A8
Empty
-
-
A9
IACV
Black/Blue
10V KOEO with warm engine
A10
Empty
-
-
A11
EGR
Red
N/A
A12
FANC – Engine Coolant Temp. Switch
Blue/Red
N/A
A13
CEL
Blue/White
N/A
A14
Empty
-
-
A15
ACC – A/C Clutch
Red/Blue
N/A
A16
ALT C – Alternator
White/Green
N/A
A17
IAB – IAB Solenoid
Pink
N/A
A18
Auto Lock Up Solenoid
Orange/Red
N/A
A19
Intake Control Solenoid
White
Battery Voltage with KOEO
A20
PCS EVAP Purge Control Solenoid
Red/Green
N/A
A21
ICM – Ignition Control Module
Yellow/Green
10V KOEO
A22
Ignitor “
A23
PG1 – Ground
Black
< 1V
A24
PG2 – Ground
A25
IGP2 – Battery Positive to Main Relay
Yellow/Black
Battery Voltage with KOEO
A26
LG1 – Ground
Black/Red
<1V
B1
IGP2 – To A25
Yellow/Black
Battery Voltage with KOEO
B2
LG2 – Ground/Shields for CYP/TDC
Brown/Black
<1V
B3
Upshift/Downshift
Orange
N/A
B4
Pink
N/A
B5
ACS – A/C Switch
Blue/Black
5V = KOEO/A/C Off; <1V KOER/A/C On
B6
Empty
-
-
B7
Park/Neutral Switch
Light Green
<1V KOEO; 5V KOER
B8
PSPSW – Power Steering Pressure Switch
Red/Green
0V KOEO; Battery Voltage KOER while turning
B9
Starter Signal
Blue/Red
Battery Voltage when in Start Position
B10
VSS – Vehicle Speed Sensor
Orange
Pulses 0-12V while spinning front-left wheel
B11
CYP P
Orange
CYP Sensor Input
B12
CYP M
White
CYP Sensor Signal
B13
TDC P
Orange/Blue
TDC Sensor Input
B14
TDC M
White/Green
TDC Sensor Signal
B15
CKP P
Blue/Green
CKP Sensor Input
B16
CKP M
Blue/Yellow
CKP Sensor Signal
D1
VBU – Back Up Power
White/Yellow
Battery Voltage at All Times
D2
BKSW – Brake Switch
Green/White
Battery Voltage at All Times
D3
KS – Knock Sensor
Red/Blue
N/A
D4
SCS – Service Check Connector
Brown/White
Manual 5V; Auto 11V
D5
Empty
-
-
D6
VTM – VTEC Pressure Switch
Light Blue
N/A
D7
TXD/RXD – Data Link Connector
Light Green/Red
N/A
D8
Empty
-
-
D9
ALT F – Alternator
White/Red
4.5V KOEO; Decreases Under Electrical Load
D10
ELD – Electrical Load Detector
Green/Black
N/A
D11
TPS
Red/Black
0.5V Closed; 4.5V Wide Open
D12
EGR Valve Lift Sensor
White/Black
1.2V KOEO
D13
ECT – ECT Sensor Input
Yellow/Blue
5V KOEO
D14
PHO2S – O2 Sensor Heater
White
0.4-0.5V Cold; 0.1V Warm
D15
IAT
Red/Yellow
0.05-4.5V Depending on Temperature
D16
VREF
-
-
D17
MAP
White/Blue
3V KOEO
D18
Transmission Control Module (Auto)
Light Green/Black
N/A
D19
Reference Voltage
Red/White
5V KOEO
D20
Reference Voltage
Yellow/White
5V KOEO
D21
Sensor Ground
Blue/White
<1V
D22
Sensor Ground
Green/White
<1V

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Jul 11 2008

OBD1 Honda/Acura ECU List

Published by Benjamin Jones under Tech Info

OBD1 Civic/Integra
P07
1992-1995 Civic VX D15Z1 California P07s don’t have lean-burn
P05
1992-1995 Civic CX D15B8
P06
1992-1995 Civic DX/LX D15B7
P28
1992-1995 Civic EX/Si D16Z6
P30
1992-1995 Del Sol VTEC/JDM SiR
P61
1992-1993 Integra GSR B17A
PR3
1992-1993 JDM Integra XSi/RSi
PR4
1992-1993 Integra RS/LS/GS
P72 1994-1995 Integra GSR
P74 1992-1995 Integra LS/GS
P75 1992-1995 Integra LS/GS
P08 1992-1995 Civic/CRX VTi/VXi
P27 1992-1995 JDM/EDM Non-VTEC D16
P29 1992-1995 JDM Domani ZC
P54 1992-1995 Domani/Accord 1.8L
P70 1992-1995 Domani SOHC VTEC ZC
P71 1992-1995 Integra SOHC VTEC D116A
P76 1994-1995 JDM Integra SOHC ZC
P84 1992-1995 JDM Civic ETi VTEC-E Automatic (eww)
P91 1992-1995 JDM Civic Coupe SOHC VTEC
OBD1 Prelude/Accord
P0A 1994-1995 Accord EX
P0B 1992-1995 Accord 2.2L F22B Non-VTEC
P0C 1992-1995 Accord 2.2L F22B DOHC Non-VTEC
PT3 1990-1993 Accord F22A1
PT5 1990-1993 EDM Accord F20A7
PT6 1991-1993 Accord Non-VTEC F22A6 IABs
P11 1992-1995 Prelude 2.0i F20A4
P12 1992-1995 Prelude S F22A Non-VTEC
P13 1993-1995 Prelude H22A DOHC VTEC
P14 1993-1995 Prelude Si H23A Non-VTEC
P39 1992-1995 JDM Prelude F22B Non-VTEC

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Jul 11 2008

OBD1 Honda/Acura ECU CEL List

Published by Benjamin Jones under Tech Info

To check your codes with an OBD1 ECU jumper your service connector and watch as your CEL blinks on the gauge cluster. A long blink is equal to 10 and a short blink is equal to 1. There will be a 2-3 second long pause between different codes, and the codes will go in a circle.

1 O2A – Oxygen sensor #1
2 O2B – Oxygen sensor #2
3 MAP – manifold absolute pressure sensor
4 CKP – crank position sensor
5 MAP – manifold absolute pressure sensor
6 ECT – water temperature sensor
7 TPS – throttle position sensor
8 TDC – top dead centre sensor
9 CYP – cylinder sensor
10 IAT – intake air temperature sensor
12 EGR – exhaust gas recirculation lift valve
13 BARO – atmospheric pressure sensor
14 IAC (EACV) – idle air control valve
15 Ignition output signal
16 Fuel injectors
17 VSS – speed sensor
19 Automatic transmission lockup control valve
20 Electrical load detector
21 VTEC spool solenoid valve
22 VTEC pressure valve
23 Knock sensor
30 Automatic transmission A signal
31 Automatic transmission B signal
36 traction control found on JDM ecu’s
41 Primary oxygen sensor heater
43 Fuel supply system
45 Fuel system too rich or lean
48 LAF – lean air fuel sensor
54 CKF – crank fluctuation sensor
58 TDC sensor #2
61 Primary oxygen sensor
63 Secondary oxygen sensor
65 Secondary oxygen sensor heater
71 random misfire cylinder 1
72 random misfire cylinder 2
73 random misfire cylinder 3
74 random misfire cylinder 4
80 Exhaust Gas Recirculation insufficient flow detected
86 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem
90 Evaporative Emission Control System leak detected in the fuel tank area
91 Fuel Tank Pressure Sensor low input
92 Evaporative Emission Control System insufficient purge flow

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