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Engine Controls - Pin Voltage Charts Mercury Capri III

Pin Voltage Charts 2 illustrations ~150 words

INTRODUCTION

Note. Unless stated otherwise in testing procedures, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. Voltage readings may vary slightly due to battery condition or charging rate.

Note. For additional pin voltage information, see appropriate trouble code information in G - TESTS W/ CODES article in the ENGINE PERFORMANCE Section.

Pin voltage charts are supplied to reduce diagnostic time. Checking pin voltages at the Electronic Control Assembly (ECA) determines whether it is receiving and transmitting proper voltage signals. Charts may also help determine if ECA wiring harness is shorted or open.

ABBREVIATION DEFINITIONS

AbbreviationDefinition
ACSA/C Cycling Switch
BLMTBlower Motor (Heat/Ventilation System)
BOOBrake On/Off Switch
BPBarometric Pressure Sensor or Circuit
CANPCanister Purge Control Solenoid
CESClutch Engage Switch
CPSCrankshaft Position Sensor
ECTEngine Coolant Temperature Sensor
EGOExhaust Gas Oxygen Sensor
FANEngine Cooling Fan
HDLTHeadlight Switch
IDLIdle Switch
IDMIgnition Diagnostics Monitor
ISCIdle Speed Control
KCUKnock Control Unit or Circuit
MILMalfunction Indicator Light
NGSNeutral Gear Switch
PSPSPower Steering Pressure Switch
PRCFuel Pressure Regulator Control
SPOUTSpark Output Signal
STOSelf-Test Output Circuit
TPThrottle Position Sensor or Circuit
VAFVane Air Flow Sensor or Circuit
VATVane Air Temperature
WACWOT A/C Cut-Off Switch or Circuit
WOTWide Open Throttle Switch

SENSOR/ACTUATOR ABBREVIATION DEFINITION

Scheme 1

Scheme 1: CONNECTOR TERMINAL IDENTIFICATION
Scheme 1: CONNECTOR TERMINAL IDENTIFICATION

ECA Connector Terminal ID (Capri). Scheme 2

Scheme 2: ECA Connector Terminal ID (Capri)
Scheme 2: ECA Connector Terminal ID (Capri)

PIN VOLTAGE CHART (FESTIVA)

Application/ (Pin #)Ref. Pin #KOEOHot Idle30 MPH55 MPH
Sensors
VAF (2O)PWRGND4.0V3.0V1.5V1.2V
VAT (2P)PWRGND3.0V3.0V3.0V3.3V
ECT (2Q)PWRGND0.36V0.36V0.46V0.50V
WOT (2L)PWRGND0V5.0V5.0V5.0V
IDL (1N)PWRGND0V0V14V14V
CPS (2E)PWRGNDN/A730-800 RPM1350-1400 RPM2350-2400 RPM
HDLT(1U)PWRGND12V ON12V ON12V ON12V ON
BLMT(1S)PWRGND12V (2)14V (2)14V (2)14V (2)
EGO (2N)PWRGNDN/A0.2-0.75V1V1V
BOO (1O)PWRGND0V0V0V0V
ACS (1Q)PWRGND12V (3)14V (3)14V (3)14V (3)
PSPS(1P)PWRGND12V14V14V14V
FAN (1R)PWRGND12V14V14V14V
NGS/CES (1V)PWRGND0V0V14V (4)14V (4)
Actuators
STO (1F)PWRGND0.6V12V12V12V
WAC (1J)PWRGND12V12V12V12V
ISC (2W)PWRGND7.45V10.5V10.8V10.6V
SPOUT (1G)PWRGNDN/A730-800 RPM1350-1400 RPM2350-2400 RPM
CANP(2X)PWRGND12V12V10-11V12-14V
MIL (1E)PWRGND1.5V12V12V12V
(1) Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors. (2) Blower off. (3) Air Conditioning On/Blower On. (4) In Gear.
(1)Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors.
(2)Blower off.
(3)Air Conditioning On/Blower On.
(4)In Gear.

ECA PIN VOLTAGE (FESTIVA) (1)

PIN VOLTAGE CHART (CAPRI NON-TURBO)

Application/ (Pin #)Ref. Pin #KOEOHot Idle30 MPH55 MPH
Sensors
TP (2G)SIGRTN0.5V0.5V0.6V0.8V
VAF (2E)SIGRTN1.8V6.7V8.0V8.2V
ECT (2I)SIGRTN2.5V0.4V0.5V0.5V
BP (2H)SIGRTN3.9V3.9V3.9V3.8V
VAT (2J)PWRGND2.4V3.0V3.0V3.0V
IDL (1E)PWRGND0V0V12.6V12.4V
NGS/CES (1G)PWRGND12V14V14V14V
BOO (1J)PWRGND12V (2)12V (2)12V (2)12V (2)
PSPS(1K)PWRGND12V14V14V14V
IDM (1M)PWRGNDN/A850-1050 RPM2650-2700 RPM3125-3175 RPM
EGO (2D)PWRGNDN/A0.8V0.5V0.6V
Actuators
CANP(2P)PWRGND12V (3)14.3V (3)14V (3)14V (3)
ISC (2Q)PWRGND7.0V10.0V9.7V9.8V
PRC (2K)PWRGND12.0V14.0V14.3V14.0V
STO (1B)PWRGND0.7V14.0V14.0V13.8V
MIL (1A)PWRGND1.6V13.2V14.0V13.8V
(1) Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors. (2) Brake pedal pressed. (3) Test in manual DC volts.
(1)Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors.
(2)Brake pedal pressed.
(3)Test in manual DC volts.

ECA PIN VOLTAGE (CAPRI NON-TURBO) (1)

PIN VOLTAGE CHART (CAPRI TURBO)

Application/ (Pin #)Ref. Pin #KOEOHot Idle30 MPH55 MPH
Sensors
TP (2G)SIGRTN0.4V0.36V0.5V0.67V
VAF (2E)SIGRTN2.0V5.5V7.4V8.1V
ECT (2I)SIGRTN2.5V0.4V0.5V0.5V
BP (2H)SIGRTN3.9V3.8V3.8V3.8V
VAT (2J)PWRGND2.2V2.3V2.6V2.7V
IDL (1E)PWRGND0V0V13.9V13.9V
NGS/CES (1G)PWRGND12V14V14V14V
BOO (O)PWRGND12V12V (2)12V (2)12V (2)
PSPS(1K)PWRGND12V13.6V13.7V13.7V
KCU (2M)PWRGND12V12V12V12V
IDM (1M)PWRGNDN/A800-900 RPM2640-2680 RPM3120-3160 RPM
EGO (2D)PWRGNDN/A0V0.5V0.5V
Actuators
CANP(2P)PWRGND12V (3)14.3V (3)14V (3)14V (3)
ISC (2Q)PWRGND7.5V7.6V9.4V9.6V
PRC (2K)PWRGND12.0V14.0V14.0V14.0V
STO (1B)PWRGND0.71V13.5V13.5V13.5V
MIL (1A)PWRGND1.6V13.6V13.7V13.6V
(1) Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors. (2) Brake pedal pressed. (3) Test in manual DC volts.
(1)Reference values shown may vary approximately +/- 20% depending on operating conditions and other factors.
(2)Brake pedal pressed.
(3)Test in manual DC volts.

ECA PIN VOLTAGE (CAPRI TURBO) (1)