Trouble Code P0320

[MOJIGGA]

The past several weeks my 96 Bronco (351W) just randomly shuts off when I'm driving, and I am unable to restart it unless someone jumps me.

The alternator is good, and my batteries are full strength.

at first I thought it was a ground wire, so I cleaned them up good, and I ran for about a week before it shut off on me again.  then I put my code reader on when it shut off, and got the cod P0320 (Ignition/Dist Engine, Speed Input Circuit Malfunction)

Does anyone know where this circuit is? after some research I saw someone said something about the ECM module.

Any information will help, such as location.

Thanks,

 

[miesk5]

Yo,

P0320 - Ignition Engine Speed Input Circuit Malfunction, aka Misfire Sensor, see below for more info. The input signal to PCM is continuously monitored. The test fails when the signal indicates that two successive erratic profile ignition pickup (PIP) pulses have occurred.

Symptoms;

Engine Light ON (or Service Engine Soon Warning Light)

Lack/Loss of Power

The engine may be harder to start

The engine may stumble or stall

Loose or corroded or faulting wires/connectors.

Possible Cause:

Low battery voltage.

Open/Shorted circuits.

Damaged distributor cap, rotor, plugs or plug wires.

Damaged coil, ICM, or PCM aka ECM.

...

Section 03-14: Engine Controls, Electronic

1996 F-150, F-250, F-350, F-Super Duty Series and Bronco Vehicles Workshop Manual

DESCRIPTION AND OPERATION

Misfire Sensor

The misfire sensor is an electromagnetic inductance coil similar in operation to a camshaft or crankshaft position sensor. A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation. The powertrain control module (PCM) (12A650) monitors the sensor pulses and flags any misfire events. When a specified number of misfires occur within a certain time frame, the powertrain control module will alert the driver to the condition by turning on the malfunction indicator light (MIL).

NOTE: Misfire sensor is not required on 49 State/Canada 7.5L engine. It is required on a 7.5L California engine.

http://www.diesel-dave.com/vehic/manual/stj/images/a24956a.gif

Installation View, Misfire Sensor and Pulse Ring

I will try to find the Ford pin point textbook you asap, but may need to send it to you because of image sizes.

Btw, some on line sources seem to dwell on replacing parts and tell folks to spend $$$ on new pcm, or icm without troubleshooting. For now inspect for Loose or corroded or faulting wires/connectors, etc, entioned above at coil, distributor, icm, pcm, etc

 

[MOJIGGA]

Thanks M,

this would also prevent the engine from starting again?

which leads me to believe ECM, is bad.   but I will check these things to see if I can find a resolution.

THANKS!

 

[miesk5]

Yo,

Could cause engine Not to start or run.

I sent you the pin point test... dwell on visual stuff first.

 

[taviswest]

Hey Miesk5, do you have the pinpoint test online anywhere or another way I can access it.  Strangly, my Bronco started doing the exact same thing last month.

 

[miesk5]

Yo taviswest,

Welcome!

Will try to get it tonight and post ASAP, but probably not until morning.

For now,

Fords pin-point test that a Ford dealer tech would do uses Ford's old Break-Out Box; so, as I mentioned in another thread here; In place of the break-out box, go to the EECV connector pin instead; Substitute EECV connector pin Number for breakout box number.

EECV Connector Pin-Out Diagram with Circuit Functions @

http://broncozone.com/uploads/monthly_07_2011/post-3816-0-58198100-1310643563.gif

Pin Number Circuit Circuit Function

1 315 (P/O) PCM to Transmission Shift Solenoid No. 2

2 658 (P/LG) PCM to Check Engine Indicator Lamp

3 � Not Used

4 � Not Used

5 � Not Used

6 651 (BK/Y) Dedicated Ground

7 � Not Used

8 � Not Used

9 � Not Used

10 � Not Used

11 � Not Used

12 � Not Used

13 107 (P) PCM Flash EEPROM Power Supply

14 784 (LB/BK) 4x4 Low Range Switch to PCM Indicator Lamp

15 915 (PK/LB) J1850 Bus Negative/Data Negative (Return) to PCM

16 914 (T/O) J1850 Bus Positive/Data Positive

17 � Not Used

18 � Not Used

19 � Not Used

20 � Not Used

21 � Not Used

22 � Not Used

23 259 (O/R) Dedicated Ground to TFI Module

24 570 (BK/W) Dedicated Ground � PCM

25 875 (BK/LB) Ground Logic Module

26 � Not Used

27 237 (O/Y) PCM to Transmission Shift Solenoid No. 1

28 � Not Used

29 224 (T/W) Transmission Overdrive Cancel Switch to PCM

30 � Not Used

31 � Not Used

32 � Not Used

33 676 (PK/O) Vehicle Speed Sensor � Negative (Return) to PCM

34 � Not Used

35 392 (P/LG) Heated Exhaust Gas Oxygen Sensor No. 3 to PCM

36 968 (T/LB) Mass Airflow Return

37 923 (O/BK) Transmission Oil Temperature to PCM

38 354 (LG/R) Engine Coolant Temperature Sensor to PCM

39 743 (GY) Air Charge Temperature Sensor to PCM

40 238 (DG/Y) Fuel Pump Monitor to PCM/Fuel Pump Relay to Safety Switch

41 198 (DG/O) A/C Pressure Switch to Control Relay

42 � Not Used

43 � Not Used

44 200 (BR) PCM to Air Management No. 2 (Was TAD)

45 � Not Used

46 � Not Used

47 360 (BR/PK) PCM to Electronic Vacuum Regulator � Constant Current

48 382 (Y/BK) PCM to Test Connector No. 2

49 395 (GY/O) Profile Ignition Pickup to PCM

50 929 (PK) PCM to Spark Angle Pulse Width/Spark Output

51 570 (BK/W) Dedicated Ground � PCM

52 � Not Used

53 924 (BR/O) PCM to Transmission Coast Clutch Solenoid

54 480 (P/Y) PCM to Transmission Converter Clutch Control

55 37 (Y) Battery to Load

56 191 (LG/BK) PCM Top Vapor Management Valve � Constant Current

57 310 (Y/R) Knock Sensor No. 1 to PCM

58 679 (GY/BK) Vehicle Speed Sensor � Positive to PCM

59 917 (DG/LG) Misfire Detection Sensor � Feed

60 74 (GY/LB) Heated Exhaust Gas Oxygen Sensor No. 1 to PCM

61 � Not Used

62 � Not Used

63 � Not Used

64 199 (LB/Y) Manual Lever Position Sensor to PCM

65 352 (BR/LG) Delta Exhaust Pressure Transducer to PCM

66 � Not Used

67 � Not Used

68 � Not Used

69 � Not Used

70 190 (W/O) PCM to Air Management No. 1 (Was TAB)

71 361 ® Power Output from PCM Relay

72 561 (T/R) PCM to Fuel Injector No. 7 Cylinder

73 559 (T/BK) PCM to Fuel Injector No. 5 Cylinder

74 557 (W) PCM to Fuel Injector No. 3 Cylinder

75 555 (T) PCM to Fuel Injector No. 1 Cylinder or Bank No. 1

76 570 (BK/W) Dedicated Ground � PCM

77 570 (BK/W) Dedicated Ground � PCM

78 � Not Used

79 911 (W/LG) PCM to Output Circuit Indicator Lamp/Overdrive Cancel Indicator

80 926 (LG/O) PCM to Fuel Pump Relay Control

81 925 (W/Y) PCM to Electronic Pressure Control No. 1

82 � Not Used

83 264 (W/LB) PCM to Idle Speed Control Motor No. 1

84 136 (DB/Y) Output Shaft Speed to PCM

85 � Not Used

86 � Not Used

87 94 (R/BK) Heated Exhaust Gas Oxygen Sensor No. 2 to PCM

88 967 (LB/R) Mass Air Flow Sensor to PCM

89 355 (GY/W) Throttle Position Sensor to PCM/Diesel Fuel Injector Pump Lever Sensor

90 351 (BR/W) Power to Engine Sensors

91 359 (GY/R) Sensor Signal Return

92 511 (LG) Stoplamp (Brake On/Off) Switch to Stoplamps

93 387 (R/W) HEGO Sensor Heater Voltage Monitor No. 1 to PCM

94 388 (Y/LB) HEGO Sensor Heater Voltage Monitor No. 2 to PCM

95 389 (W/BK) HEGO Sensor Heater Voltage Monitor No. 3 to PCM

96 � Not Used

97 361 ® Power Output from PCM Relay

98 562 (LB) PCM to Fuel Injector No. 8 Cylinder

99 560 (LG/O) PCM to Fuel Injector No. 6 Cylinder

100 558 (BR/LB) PCM to Fuel Injector No. 4 Cylinder

101 556 (W) PCM to Fuel Injector No. 2 Cylinder or Bank No. 2

102 � Not Used

103 570 (BK/W) Dedicated Ground � PCM

104 � Not Used

...

Print this out.

 

[miesk5]

Yo,

Will try to post the test now, but I WILL ENTER SOME IN & THEN I WILL POST IT. THEN WILL POST ANOTHER SECTION; because my Internet connection mat freeze as it did the other day on another pin-point test.

NC: Ignition Diagnostic Monitor (IDM) - Integrated Electronic Ignition (EI)

1996 PCED On Board Diagnostics II A

SECTION 6A: Pinpoint Tests

NC: Ignition Diagnostic Monitor (IDM) - Integrated Electronic Ignition (EI)

NC1 CONTINUOUS MEMORY DTC P0320: ERRATIC IGNITION

Continuous Memory Diagnostic Trouble Code (DTC) P0320 indicates two successive erratic Profile Ignition Pickup (PIP) pulses occurred resulting in a possible engine miss or stall.

Possible causes:

Loose wires/connectors.

Arcing secondary ignition components (coil, wires, plugs, etc.).

On-board transmitter (2-way radio).*

Are any of the above present?

*Verify all 2-way radio installations. Carefully follow manufacturer's installation instructions regarding the routing of antenna and power leads.

Yes SERVICE as necessary. Complete PCM Reset to clear DTCs (REFER to Section 2A, Powertrain Control Module (PCM) Reset). RERUN Quick Test.

No:

For No Starts: GO to Pinpoint Test Step A1.

For Intermittent Faults: GO to Pinpoint Test Step Z50.

All others: Loss of PIP. REPLACE PCM.

Will do STEP Z50.

Z: Intermittent 1996 PCED On Board Diagnostics II A

SECTION 6A: Pinpoint Test

Z1 INTERMITTENT TEST PROCEDURE

Note: All Intermittent Procedures are used in conjunction with the Intermittent Symptom Charts and the Typical Diagnostic Reference Values at the end of the pinpoint.

If directed here from another pinpoint test, refer to PIDs, circuits or components that were recommended or else refer to the Symptom Chart at the end of the pinpoint for the proper selection.

Based on the Intermittent Prioritization Chart, choose an Intermittent Diagnostic Procedure below:

Input Test - This test is used on sensing devices such as temperature, position, oxygen, etc.

Output Test - This test is used on output devices such as relays, coils, solenoids, etc.

Water Soak Test - This test is used on both input and output devices. Especially useful on spark plug wires, relays and hall effect sensors.

Road Test - This test is used on both input and output devices. Four modes of engine operation are monitored for intermittent.

Note: The electronic ignition (EI) system tester is not capable of diagnosing coil on plug (COP) systems.

Ignition Test - This test is for non coil on plug only and used to diagnose the ignition system using the Electronic Ignition (EI) System Tester. Coil on plug applications will use the input, output, water soak and road test only. Select the next priority from the intermittent prioritization chart.

Have you chosen an Intermittent Diagnostic Test procedure?

Yes For the Input Test: GO Z10.

For Output Test: GO to Z20.

For Water Soak Test: GO to Z30.

For Road Test: GO to Z40.

For Ignition Test: GO to Z50.

No To diagnose other driveability symptoms, GO to Symptom Flowcharts, Symptom Flowcharts.

Z10 INTERMITTENT KOEO INPUT WIGGLE PROCEDURE

WARNING: USE CAUTION WHEN PERFORMING ANY OF THE TEST STEPS. ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, ENGINE DRIVE BELTS OR HOT SURFACES.

Key off.

Connect Scan Tool to DLC.

Access PIDs based on information from the pinpoint test or Intermittent Symptom Charts at the end of this pinpoint test.

Go to the area of the suspected wiring or component fault.

Key on, engine off.

If input is a switch-type component, turn on manually.

Lightly tap on component while viewing PID values. Wiggle and pull each component wire (Signal, Signal Return and VREF, if applicable) at the component.

Look for abrupt changes in PID values. Compare the actual PID values to the KOEO Diagnostic Reference PID Values at the end of this pinpoint test.

Are any PID values out of range or suddenly drop out and back into range?

Yes Possible wiring or component problem. CHECK each wire for corrosion, bent or loose terminals and poor wire terminal crimps. SERVICE as necessary. Otherwise, REPLACE component. VERIFY repair. If unable to verify, REINSTALL original part and GO to Z11.

No GO to Z11 for PCM wiring check.

Z11 INTERMITTENT KOEO INPUT WIGGLE PROCEDURE

Continue to monitor the information from the previous step.

Go to the area of the suspected wiring or component fault.

Turn ignition key to the ON position.

Wiggle and pull each sensor wire (Signal, Signal Return and VREF, if applicable) from the component back to the PCM connector.

Look for abrupt changes in PID values. Compare the actual values to the KOEO Diagnostic Reference PID Values.

Are any PID values out of range or suddenly drop out and back into range?

Yes Possible wiring or component problem. CHECK each wire for corrosion, bent or loose terminals and poor wire terminal crimps. SERVICE as necessary. Otherwise, if the value dropped out while checking the PCM harness connector and there is no evidence of a fault, REPLACE PCM. If unable to verify, REINSTALL original PCM. Return to Z1 and choose another procedure to follow.

No Unable to verify fault. GO to Z12 KOER Wiggle Test.

Z12 KOER Wiggle Test

WARNING: USE CAUTION WHEN PERFORMING ANY OF THE TEST STEPS. ALWAYS BE AWARE OF HANDS, CLOTHING OR TOOLS NEAR COOLING FANS, ENGINE DRIVE BELTS OR HOT SURFACES.

Key off.

Access PIDs based on information from the pinpoint test or from the Intermittent Symptom Chart.

Go to the area of the suspected wiring or component fault.

Key on, engine running.

Lightly tap on component while viewing PID values. Also wiggle and pull each component wire (Signal, Signal Return and VREF, if applicable) at the component.

Look for abrupt changes in PID values. Compare the actual values to the HOT IDLE Diagnostic Reference PID Values.

Are any PID values out of range or suddenly drop out and back into range?

Yes Possible wiring or component problem. CHECK each wire for corrosion, bent or loose terminals and poor wire terminal crimps. SERVICE as necessary. Otherwise, REPLACE component. VERIFY repair. If unable to verify, REINSTALL original part, and GO to Z13.

No GO to Z13 for PCM wiring check

Z13 INTERMITTENT KOER INPUT WIGGLE PROCEDURE

Continue to monitor the information from the previous step.

Go to the area of the suspected wiring or component fault.

Key on, engine running.

Wiggle and pull each component wire (Signal, Signal Return and VREF, if applicable) from the component back to the PCM connector.

Look for abrupt changes in PID values. Compare the actual values to the HOT IDLE Diagnostic Reference PID Values.

Are any PID values out of range or suddenly drop out and back into range?

Yes Possible wiring or component problem. CHECK each wire for corrosion, bent or loose terminals and poor wire terminal crimps. SERVICE as necessary. Otherwise if the value dropped out while checking the PCM harness connector and there is no evidence of a wiring fault, REPLACE PCM. If unable to verify repair, REINSTALL original PCM and RETURN to Z1 and choose another procedure to follow.

No Unable to verify fault. RETURN to Z1 and choose another procedure to follow.

.....

End

.....

Diagnostic Reference Values

Sensors Measured/PID Values Units Measured

Pin# KOEO Hot Idle 30 MPH 55 MPH

MISF 59 0/OFF 47-52/OFF 82-88/OFF 105-110/OFF Hz/OFF-ON

IDM 48 0 47-52 82-88 105-110 Hz

PIP 49 0 47-52 82-88 105-110 Hz

MAF 88 0 .7-.9 1-1.6 1.7-2.4 DCV

TP 89 .53-1.27 .53-1.27 .8-1 1-1.3 DCV

VSS 58 0/0 0/0 65/30 125/55 Hz/MPH

RPM PID 0 760-830 1200-1270 1600-1650 RPM

ECT 38 .4-1/ 160-200 .4-1/ 160-200 .4-1/ 160-200 .4-1/ 160-200 DCV/DEG

IAT 39 1.7-3.5/ 50-120 (K) 1.7-3.5/ 50-120 (K) 1.7-3.5/ 50-120 (K) 1.7-3.5/ 50-120 (K) DCV/DEG

GEAR PID 1 1 3 4 GEAR

LOAD PID (L) 14-16 19-25 26-35 %

BOO 92 .1/OFF VBAT/ON (E) .1/OFF .1/OFF DCV/OFF-ON

FPM 40 .1/OFF VBAT/ON VBAT/ON VBAT/ON DCV/OFF-ON

...

Actuators/ Outputs:

SS2 1 VBAT/OFF VBAT/OFF .1/ON VBAT/OFF DCV/OFF-ON

MIL 2 .1/OFF VBAT/OFF VBAT/OFF VBAT/OFF DCV/OFF-ON

SS1 27 .1/ON .1/ON VBAT/OFF VBAT/OFF DCV/OFF-ON

AIRD 44 bVBAT VBAT VBAT VBAT DCV

DPFEGR 65 0.2-1.3 0.2-1.3 0.2-4.5 0.2-4.5 DCV

SPOUT 50 0 47-52 82-88 105-110 Hz

CCS 53 VBAT/OFF VBAT/OFF VBAT/OFF VBAT/OFF DCV/OFF-ON

TCC 54 VBAT/OFF VBAT/OFF .1/ON .1/ON DCV/OFF-ON

VMV 56 0 0 0-10 0-10 Hz

AIRB 70 VBAT 0.1 0.1 0.1 DCV

INJ7 72 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ5 73 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ3 74 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ1 75 0 3.2-3.8 4.1-6.9 6.5-12 mS

TCIL 79 VBAT/OFF VBAT/OFF VBAT/OFF VBAT/OFF DCV/OFF-ON

FP 80 VBAT/OFF .1/ON .1/ON .1/ON DCV/OFF-ON

EPC 81 7.4/4 9.1/4 9.4/4 9.6/4 DCV/PSI

IAC 83 VBAT/0 10.2-10.9/ 30-34 9.7-10.8/ 43-48 8-9/58-61 DCV/%

TCIL 79 VBAT/OFF VBAT/OFF VBAT/OFF VBAT/OFF DCV/OFF-ON

FP 80 VBAT/OFF .1/ON .1/ON .1/ON DCV/OFF-ON

EPC 81 7.4/4 9.1/4 9.4/4 9.6/ DCV/PSI

IAC 83 VBAT/0 10.2-10.9/ 30-34 9.7-10.8/ 43-48 8-9/58-61 DCV/%

HTR11 93 ,.1/ON (s) .1/ON .1/ON .1/ON DCV/OFF-ON

HTR21 94 .1/ON (s) .1/ON .1/ON .1/ON DCV/OFF-ON

HTR12 95 .2/ON (s) .2/ON .2/ON .2/ON DCV/OFF-ON

INJ8 98 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ6 99 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ4 100 0 3.2-3.8 4.1-6.9 6.5-12 mS

INJ2 101 0 3.2-3.8 4.1-6.9 6.5-12 mS

FUELPW1 PID 0 3.2-3.8 4.1-6.9 6.5-12 mS

FUELPW2 PID 0 3.2-3.8 4.1-6.9 6.5-12 mS

LONGFT1 PID (-)20-(+)20 (-)20-(+)20 (-)20-(+)20 (-)20-(+)20 %

LONGFT2 PID (-)20-(+)20 (-)20-(+)20 (-)20-(+)20 (-)20-(+)20 %

SHRTFT1 PID 0 (-)10-(+)10 (-)10-(+)10 (-)10-(+)10 %

SHRTFT2 PID 0 (-)10-(+)10 (-)10-(+)10 (-)10-(+)10 %

SPARKADV PID 0 12-17 35-40 28-37 DEG

End

...

OTHER

PIN# KOEO Hot Idle 30 MPH 55MPH

FUEL PRES 29-32 30-32 30-32 32-35 PSI

VACUUM 0 19-20 18-20 8-15 In HG

VPWR #71/97 VBAT VBAT VBAT VBAT DCV

VREF #90 5 5 5 5 DCV

NOTE: All generic OBD II readings under no load (Park or Neutral).

...end...

....

PID Hot Idle 2500 RPM Units

LONGFT1 (-)20-(+)20 (-)20-(+)20 %

LONGFT2 (-)20-(+)20 (-)20-(+)20 %

LOAD 27-35 20-25 %

MAF 4.8-5.3 18.1-21 G/S

SHRTFT1 (-)10-(+)10 (-)10-(+)10 %

SHRTFT2 (-)10-(+)10 (-)10-(+)10 %

SHRTFT11 (-)10-(+)10 (-)10-(+)10 %

SHRTFT12 95-100 95-100 %

SHRTFT21 (-)10-(+)10 (-)10-(+)10 %

 

[miesk5]

Yo,

That is it.

Sorry, could not insert tables as a picture, had to type them in.

 

[miesk5]

Yo,

Figures, screen froze after I tried to add more info this morning.

Here is most of it:

The Parameter Identification (PID) mode allows access to powertrain control module (PCM) information. This includes analog and digital signal inputs and outputs along with calculated values and system status. There are two types of PID lists available and both are used throughout this manual. The first is the Generic (J1979) OBDII PID list. This is a standard set of PIDs for all manufacturers all scan tools must be able to access. The second is a Ford specific (J2190) list which can be accessed by an adequate scan tool. When accessing any of these PIDs, the values will be continuously updated. The Generic or Ford PID list provides definitions and values in appropriate units. For more information, refer to the Society of Automotive Engineers (SAE) J2205 document.

Enuf of the engineers explanation. A scan tool that can show PIDs basically shows the operating values on sensors and devices such as temperature, (Engine coolant temperature (ECT)), position (Throttle Position Sensor ( TPS)), & oxygen (Oxygen Sensor (O2)), etc.

& on devices such as relays, coils, solenoids, etc.

 

[miesk5]

Yo, Part 2,

Ford states "Wiggle and pull each component wire (Signal, Signal Return and VREF, if applicable) from the component back to the PCM connector."

This means you will need to remove the wiring harness wrap and what Ford calls the harness's "Locator" that is just a clip that hold the harness in place.

As for the Signal, Signal Return and VREF wires, just wiggle each wire on the sensor or device. For example, on the Throttle Position Sensor ( TPS) there are 3 wires;

VREF - Brown/White

TP SIG - Gray/White

SIG RTN -Gray/Red

As you gonthrough the test note those on a sheet of paper.

For others wiggle each wire and note those on a sheet of paper.

For the PID acronyms, see this;

http://diagrams.hissind.com/ford-pid-list/

I tried to copy and paste them, but... screen froze.

BTW, I think the zone has a big issue.

 

[miesk5]

Yo,

http://www.fuelinjectedford.com/images/ect02.jpg

ECT

http://www.fuelinjectedford.com/images/maf04.gif

MAF

http://www.fuelinjectedford.com/images/hego02.gif

O2. I will update this 02 later when I can get the wiring diagram up to confirm

 

[miesk5]

Yo,

At times after engine stops running, can it be restarted immediately?

If not;

Listen

A: No Start

1996 PCED On Board Diagnostics II A

SECTION 6A: Pinpoint Tests

A: No Start

← A: Introduction

A1 ATTEMPT TO CRANK ENGINE

Note: Verify Inertia Fuel Shutoff (IFS) switch is set (button pushed in). Refer to Owner Guide for location.

Does engine crank?

Yes GO to A2.

No REFER to Group 03 in Service Manual.

A2 IDENTIFY TYPE OF NO START

Note: The purpose of this Test Step is to identify intermittent No Starts in order to guide the technician to the proper repair procedure.

Does the vehicle start now?

Yes Vehicle is an intermittent No Start. GO to Pinpoint Test Step Z50 and prepare to use the Ignition Intermittent Analyzer, DIST tool.

Forget this tool. Doubt dealers have it in service anymore, may be on E bay.

No GO to A4

A4 CHECK FOR VREF AT THROTTLE POSITION (TP) SENSOR

Key off.

Disconnect TP sensor.

Key on, engine off.

Measure voltage between VREF circuit and SIG RTN circuit at the TP sensor vehicle harness connector.

Is voltage between 4.0 and 6.0 volts?

Yes RECONNECT TP sensor. GO to A5.

No GO to Pinpoint Test Step C1.

A5 CHECK FEPS CIRCUIT FOR SHORT TO POWER

Key off.

Key on, engine off.

Measure voltage between Pin 13 at the data link connector and battery negative post.

Is voltage greater than 9.0 volts?

Yes SERVICE short to power. REMOVE breakout box. RECONNECT all components. RERUN Quick Test.

No GO to A6.

A6 CHECK FOR SPARK AT THE PLUGS

Disconnect the spark plug wire to any accessible cylinder.

Connect spark tester between spark plug wire and engine ground.

Connect Spark Plug Firing Indicator D81P-6666-A or D89P-6666-A or equivalent.

Crank engine and check for spark.

Reconnect the spark plug wire to the spark plug.

Was spark present and consistent?

Yes GO to A7

No GO to Pinpoint Test Step JD1.

A7 CHECK FUEL PRESSURE

WARNING: BEFORE SERVICING OR REPLACING ANY COMPONENTS IN THE FUEL SYSTEM, REDUCE THE POSSIBILITY OF INJURY OR FIRE BY FOLLOWING DIRECTIONS IN PINPOINT TEST HC WARNING, CAUTION, AND HANDLING.

Key off.

Release the fuel pressure.

Install fuel pressure tester.

Scan Tool connected.

Key on, engine off.

Enter Output Test Mode (refer to Diagnostic Methods) and run the fuel pump to obtain maximum fuel pressure.

Is fuel pressure between 35 and 40 psi (240-280 kPa)?

Yes GO to A8.

No GO to Pinpoint Test Step HC1

I better post now..will continue.

I am not going to copy and paste some steps such as Pinpoint Test Step JD1 because I am GUESSING that plugs have been checked and ******* if not, let me know.

 

[miesk5]

Yo,

A8 CHECK FUEL PRESSURE LEAKDOWN

Observe WARNING, CAUTION AND HANDLING in Pinpoint Test HC.

Fuel pressure tester installed.

Scan Tool connected.

Key on, engine off.

Enter Output Test Mode and run fuel pump to obtain maximum fuel pressure.

Exit Output Test Mode, key off.

Verify fuel pressure remains within 5 psi of the maximum pressure for 1 minute after turning pump off.

Does fuel pressure remain within 5 psi?

Yes GO to A9

No GO to Pinpoint Test Step HC1

A9 CHECK CONTINUITY OF IGNITION GROUND CIRCUIT

Key off.

Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

Install breakout box, leave PCM disconnected.

Install EI diagnostic harness (Rotunda 007-00059 or equivalent) to ignition breakout box.

Connect ICM tee to vehicle harness.

Install ICM overlay.

Measure resistance between Test Pin 23 at breakout box and IGN GND circuit pin at the EI diagnostic harness.

Is resistance less than 5.0 ohms?

Yes GO to A10

No SERVICE open circuit. REMOVE breakout box. RECONNECT all components. RERUN Quick Test.

A10 CHECK PIP CIRCUIT CONTINUITY

Key off.

Breakout box installed, PCM disconnected.

EI harness installed, ICM disconnected.

Measure resistance between Test Pin 49 at breakout box and PIP circuit at the EI diagnostic harness.

Is resistance less than 5.0 ohms?

Yes GO to A11.

No SERVICE open circuit. REMOVE breakout box. RECONNECT all components. RERUN Quick Test.

A11 CHECK PIP CIRCUIT FOR SHORT TO POWER

Key off.

Breakout box installed, PCM disconnected.

ICM disconnected.

EI harness installed.

Key on, engine off.

Measure voltage between Test Pin 49 at breakout box and battery negative post.

Is voltage greater than 1.0 volts?

Yes SERVICE short to power. REMOVE breakout box. RECONNECT all components. RERUN Quick Test.

No GO to A12

A12 CHECK PIP SIGNAL CIRCUIT FOR SHORTS TO GROUND

Key off.

Breakout box installed, PCM disconnected.

ICM disconnected.

Measure resistance between Test Pin 49 (PIP) and Test Pins 23, 51, 91 and 103 (short to ground).

Is each resistance greater than 10,000 ohms?

Yes GO to A13.

No SERVICE short circuit. REMOVE breakout box. RECONNECT all components. RERUN Quick Test. If vehicle does not start. GO to A13

A13 CHECK PIP SIGNAL

Key off.

Breakout box installed, PCM disconnected.

Reconnect ICM.

Measure voltage between Test Pin 49 and Test Pin 23 at breakout box.

Crank engine, record reading.

Is voltage between 3.0 and 7.0 volts?

Yes REPLACE PCM. REMOVE breakout box. RERUN Quick Test

No REPLACE ICM. REMOVE breakout box. RERUN Quick Test.

....

 

[miesk5]

Yo,

Some dealers may not do these tests. An automotive electric shop may do them for you if you pass on doing them. It is not easy, I knowe. But at least you have an idea of what needs to be tested and to be able to ask questions.