Ford Festiva. Instruction - part 46

Fig. 14: Identifying CANP Circuit & Connector

CANP CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB. Leave ECA disconnected. Turn ignition on. Remove canister purge hose from intake manifold, and apply

vacuum. Connect a jumper wire between CANP test terminal and ground. If vacuum releases, solenoid is okay. If vacuum does not
release, go to next step.

2. Locate CANP solenoid near center of cowl panel. Unplug solenoid connector. Apply vacuum to port from engine vacuum source.

Replace CANP solenoid if it does not hold vacuum.

3. Connect BOB. Leave ECA disconnected. Reconnect wiring to CANP solenoid. Turn ignition on. Apply vacuum to CANP solenoid.

Connect jumper wire between CANP test pin on BOB and ground. If vacuum drops to zero, solenoid function is okay. Return to QUICK
TESTS if sent here from there. If vacuum does not drop to zero, go to next step.

4. Turn ignition off. Unplug CANP solenoid connector. Turn ignition on. Measure voltage between VPWR wire on harness connector and

ground. If voltage is not higher than 10 volts, repair VPWR wire to main relay. If voltage is higher than 10 volts, go to next step.

5. Turn ignition off. Unplug CANP solenoid connector. Turn ignition on. Measure voltage between solenoid connector VPWR wire and

solenoid connector SIG wire. Connect jumper wire between CANP test pin on BOB and ground. If voltage is higher than 10 volts only
when solenoid is activated, replace solenoid. If voltage is not higher than 10 volts only when solenoid is activated, go to next step.

6. Turn ignition off. Connect BOB. Leave ECA disconnected. Unplug CANP solenoid connector. Measure resistance between SIG test pin

and solenoid connector SIG wire. If resistance is not less than 5 ohms, repair SIG wire to ECA. If resistance is less than 5 ohms, go to
next step.

7. Turn ignition off. Connect BOB. Leave ECA disconnected. Unplug solenoid connector. Measure resistance between SIG test pin and all

other test pins. If resistance between SIG PRC test pin and any other pin is less than 5 ohms, repair CANP wire to ECA. If resistance
between CANP test pin and all other pins is greater than 10,000 ohms, replace ECA.

PINPOINT TEST ISC - IDLE SPEED CONTROL

Fig. 15: Identifying ISC Circuit & Connector

ISC CIRCUIT PIN IDENTIFICATION

1. Install BOB, leaving ECA disconnected. Turn ignition on. Connect a jumper between BOB test pin No. 41 and ground. Listen for

clicking sound from solenoid, mounted on throttle body. If clicking sound occurs, ISC solenoid is okay; return to QUICK TESTS if sent
here from there. If no clicking sound occurs, go to next step.

2. Unplug ISC solenoid connector. With ignition on, measure voltage between VPWR wire and ground. If voltage is less than 10 volts,

repair VPWR wire to main relay. Go to next step if voltage is not less than 10 volts.

3. Measure voltage between ISC solenoid VPWR wire and solenoid connector SIG wire while cranking engine. Replace solenoid if voltage

is more than 10 volts only when engine is cranking. If okay, go to next step.

4. With BOB installed and ECA disconnected, unplug ISC solenoid connector. Check for continuity between BOB SIG test pin and ISC

connector SIG wire. If resistance is not less than 5 ohms, repair ISC wire between solenoid and ECA. If okay, go to next step.

5. With BOB installed and ECA disconnected, measure resistance between BOB SIG test pin and all other test pins. If resistance is less

than 5 ohms, repair short in SIC wire to ECA. If resistance is not less than 5 ohms, replace ECA.

PINPOINT TEST STI - SELF-TEST INPUT

STI CIRCUIT PIN IDENTIFICATION

Circuit

ECA Pin

BOB Pin

Wire Color

CANP

1.3L

RED

1.6L

YEL

NOTE:

Enter this test only when a Code 34 is displayed during QUICK TESTS procedure or when directed here
from another PINPOINT TEST.

Circuit

ECA Pin

BOB Pin

Wire Color

ISC

1.3L

RED/BLK

1.6L

GRN

NOTE:

Enter this test only when sent here from QUICK TESTS.

1. Turn ignition off. Install BOB. Leave ECA disconnected. Connect test light between STI test pin on BOB and 12-volt source. If test

light comes on, go to

PINPOINT TEST STO

. If light does not come on, go to next step.

2. Leave test light connected. Ground STI connector. If test light does not come on, repair open circuit between STI connector and ECA.

PINPOINT TEST STO - SELF-TEST OUTPUT

Fig. 16: Identifying STI & STO Circuit & Connector

STO CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB. Leave ECA disconnected. Measure resistance between STO test pin and STO terminal of self-test

connector. If resistance is greater than 5 ohms, repair circuit between ECA and self-test connector. If resistance is less than 5 ohms, go
to next step.

2. Measure resistance between STO test pin and all other test pins. If resistance between STO test pin and any other test pin is less than 5

ohms, repair short in STO wire to diagnostic connector. If resistance is greater than 5 ohms, go to

PINPOINT TEST PGC

PINPOINT TEST PGC - POWER & GROUND CONNECTIONS

PGC CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB, leaving ECA disconnected. Turn ignition on. Measure voltage at BOB pin in question. Compare voltage

to specification in

PGC CIRCUIT PIN IDENTIFICATION

table. If voltage is not to specification, repair wire in question.

2. Measure resistance between ground and BOB pin in question. If any measurement is greater than 5 ohms, repair associated wire to

ground. If resistance is less than 5 ohms, return to

PINPOINT TEST VREF

if sent here from there, and replace ECA. If not sent here

from PINPOINT TEST VREF, return to diagnostic routine.

PINPOINT TEST STG - SWITCH TO GROUND

Circuit

ECA Pin

BOB Pin

Wire Color

STI

1.3L

YEL/GRN

1.6L

YEL

NOTE:

Enter this test only when codes cannot be retrieved or when directed by PINPOINT TEST STI.

Circuit

ECA Pin

BOB Pin

Wire Color

STO

1.3L

YEL/WHT

1.6L

GRN/BLK

NOTE:

Enter this test only when directed here from QUICK TESTS or another PINPOINT TEST.

Circuit

ECA Pin

BOB Pin

Wire Color

1.3L

GND

39, 40, 44, 60

BLK

GND

BLK

GND

BLK

GND

46, 49

BLK

KAPWR

(1)

WHT/RED

MT/AT

(2)

BLK

1.6L

GND

BLK

GND

BLK

GND

BLK

KAPWR

(1)

BLU/RED

(1)

Battery voltage.

(2)

Instruction transmission only.

NOTE:

Enter this test only when directed here from QUICK TESTS or another PINPOINT TEST.

STG CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between switch BOB test pin and ground. Cycle switch. If

resistance is greater than 10,000 ohms with switch open and less than 5 ohms when switch is closed, switch is okay; go to step 4). If
resistance is not greater than 10,000 ohms with switch open, or greater than 5 ohms when switch is closed, go to next step.

2. Turn ignition off. Disconnect switch. Connect ohmmeter between switch terminals on 2-pin switches, or between ground and switch

ECA terminal on multi-pin or one-pin switches. Cycle switch. If resistance is not greater than 10,000 ohms with switch open, or is
greater than 5 ohms when switch is closed, replace switch. If resistance is greater than 10,000 ohms with switch open and less than 5
ohms when switch is closed, switch is okay; go to next step.

3. Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between BOB pin for suspected switch and BOB pins 26,

37, 57, and 60. If any measurement is less than 10,000, repair shorted wire in question. If all measurements are greater than 10,000
ohms, go to next step.

4. Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between BOB pin for suspected switch and switch

connector. If resistance is greater than 5 ohms, repair wire in question. If sent here from SWITCH MONITOR TEST in QUICK TESTS,
replace ECA; otherwise, return to QUICK TESTS.

PINPOINT TEST STP - SWITCH TO POWER

STP CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB, leaving ECA disconnected. Turn ignition on. Cycle switch in question. Measure voltage between switch

BOB test pin and ground. If voltage changes from less than 4 volts to more than 10 volts, switch is okay. If sent here from SWITCH
MONITOR TEST in QUICK TESTS, replace ECA. If sent here from elsewhere in QUICK TESTS, return to QUICK TESTS. If voltage is
not as specified, go to next step.

2. Turn ignition on. Measure voltage at switch in question on wire to ECA. Cycle switch. If voltage changes from less than 4 volts to more

than 10 volts, repair wire from switch to ECA. If voltage does not change from less than 4 volts to more than 10 volts, go to next step.

3. Turn ignition on. Install BOB, leaving ECA disconnected. Measure resistance between BOB test pin for switch in question and ground

and between BOB test pin and BOB pins 37, 57, and 26. If resistance is greater than 10,000 ohms for all measurements, go to next step.
If resistance is not greater than 10,000 ohms for all measurements, repair wire to switch.

4. Disconnect switch. Measure resistance between switch terminals. Cycle switch. If resistance is less than 5 ohms with switch closed and

greater than 10,000 ohms with switch open, switch is okay. If sent here from SWITCH MONITOR TEST in QUICK TESTS, return to
QUICK TESTS. If sent here from elsewhere in QUICK TESTS, replace ECA. If resistance is not as specified, replace switch.

PINPOINT TEST VPWR - VEHICLE POWER

Switch

ECA Pin

BOB Pin

Wire Color

1.3L

ACS

BLU/RED

BLMT

GRN

IDL

YEL/BLK

NGS/CES

(1)

BLU/WHT

PSPS

PNK

WOT

YEL

1.6L

BPS

(2)

LT GRN/BLK

IDL

GRN/ORG

NGS/CES

(1)

RED/BLU

PSPS

GRN/RED

(1)

Instruction transmission only.

(2)

Turbo only.

NOTE:

For 1.3L, blower motor resistor must be disconnected, HEATER fuse must be removed, and blower
motor switch must be in position "1" when testing ACS signal.

NOTE:

Enter this test only when directed here from QUICK TESTS.

Switch

ECA Pin

BOB Pin

Wire Color

1.3L

ACS

GRN

BOO

GRN/RED

DEF

BLK/BLU

Fan

YEL/RED

HLDT

WHT

VST

BLK/RED

1.6L

BOO

WHT/GRN

VST

BLK/RED

NOTE:

Enter this test only when directed here from another PINPOINT TEST. To prevent replacement of good
components, note following non-EEC components may be faulty: ignition switch, alternator, battery
cables, ground straps, or voltage regulator. This test is intended to diagnose only ECA, wiring harness
circuits, and battery voltage.

Fig. 17: Identifying VPWR Circuit & Connector

VPWR CIRCUIT PIN IDENTIFICATION

1. Turn ignition off. Install BOB, leaving ECA disconnected. Turn ignition on. Measure voltage between VPWR test pin and battery

ground. If voltage is not greater than 10 volts, go to step 3). If voltage is greater than 10 volts, go to next step.

2. Measure voltage between VPWR test pin and GROUND test pin. If voltage is greater than 10 volts, go to next step. Repeat measurement

for each ECA ground wire. If all voltages are greater than 10 volts, go to

PINPOINT TEST VREF

. If all voltages are not greater than

10 volts, repair ECA ground wire in question.

3. Turn ignition off. Locate main power relay. On Capri, relay is located on left side of engine compartment. On Festiva, relay is located at

left front of engine compartment. Disconnect main power relay 4-wire connector. Using jumper wires, connect BATT, PWR, and GND
terminals of relay to corresponding trammels on connector. Leave VPWR wire disconnected.

4. Turn ignition on. Measure voltage between main power relay VPWR terminal (where VPWR wire was) and ground. If voltage is more

than 10 volts, repair VPWR circuit between main power relay and ECA. If voltage is not more than 10 volts, go to next step.

5. Unplug main relay connector. Measure voltage between harness connector BATT wire and ground. If voltage is not greater than 10

volts, repair BATT wire from battery to harness connector. If voltage is greater than 10 volts, go to next step.

6. Unplug main relay connector. Measure voltage between harness connector PWR wire and ground. If voltage is not greater than 10 volts,

repair PWR wire from ignition switch to harness connector. If voltage is greater than 10 volts, go to next step.

7. Measure voltage between main power relay BATT wire and main power relay GROUND wire. If voltage is less than 10 volts, repair

main power relay ground wire. If voltage is not less than 10 volts, ground circuit is okay; replace main power relay.

PINPOINT TEST VREF - REFERENCE VOLTAGE & SIGNAL RETURN

Circuit

ECA Pin

BOB Pin

Wire Color

1.3L

GND

39, 40, 44, 60

BLK

GND

BLK

GND

BLK

VPWR

37, 57

YEL/BLK

1.6L

GND

BLK

GND

BLK

GND

BLK

VPWR

YEL/GRN

NOTE:

Enter this test only when directed from another PINPOINT TEST.

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