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Engine Controls - System/component Tests - Eec-Iv (5.0L): Diagnosis Ford Mustang IV

Testing & Diagnostics 1 illustration ~1208 words

Test Equipment

Following test equipment should be used in DI system tests.

  1. Spark Tester (D81P-6666-A Or D89P-6666-A)
  2. Digital Volt-Ohmmeter (DVOM)
  3. 12-Volt Test Light
  4. Remote Starter Switch
  5. EEC-IV Diagnostic Cable (007-00097)
  6. EEC-IV Breakout Box (T83L-50-EEC-IV)
  7. Inductive Timing Light
  8. Ignition Intermittent Analyzer (077-00075)
  9. TFI Intermittent Analyzer (077-00035)

Diagnostic Aids

PINPOINT TESTS A, AA, AAA, B and C are intended to diagnose hard faults. Intermittent failures may be difficult to diagnose using these procedures. Following information should be noted during testing

  1. All voltage readings given in test procedures are based on values obtained using a standard DVOM such as Rotunda (007 -00001) or Fluke (20 or 70 Series). DO NOT use RMS type meter.
  2. When instructed to inspect a wiring harness, perform both a visual inspection and a continuity test.
  3. When making voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
  4. When making measurements on a wiring harness or connector, perform a wiggle test while measuring.
  5. When making voltage checks, ground readings are defined as a value of less than 1.0 volt. Battery voltage is defined as a value of more than 10 volts.
  6. Circuits are identified in all capital letters; for example: PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix; for example: J15 (PIP). This indicates test terminal number and circuit identification. Probe models may not have a "J" designation in front of the test terminal number.
  7. Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is intermittent condition, refer to «TESTS W/O CODES - EEC-IV (5.0L)»(ref-23230) article.

Note. Start all diagnostics with QUICK TEST. See the appropriate TESTS W/CODES - EEC-IV (5.0L) article. Following tests are dependent on results and diagnostic trouble codes received during QUICK TEST.

ApplicationPinpoint Test/Step
No Start & No Codes PresentAA/1
No Start & Code 211 Or 212 Present (PIP At PCM Fault)AA/1
Vehicle Runs Normal Until SPOUT In-Line Connector Disconnected(1) AAA/1
Code 212 (Engine Runs, IDM Missing)B/1
Code 213 (Timing Incorrect, SPOUT Open, Poor Fuel Economy Or Poor Driveability)C/1
(1) Vehicles with remote mounted ICM only.
(1)Vehicles with remote mounted ICM only.

DISTRIBUTOR IGNITION PINPOINT TEST INDEX

Remote-Mounted ICM System Diagram. Scheme 73

Scheme 73: Remote-Mounted ICM System Diagram
Scheme 73: Remote-Mounted ICM System Diagram

PINPOINT TEST AA: NO START REMOTE-MOUNTED ICM

Pinpoint Test A

A1 Check For Codes
A2 Check Battery
A3 Check For Spark
A4 Check For ICM Power
  1. WARNING: DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously.
A6 Check PIP Signal
A7 Check SPOUT Signal
  1. Fig. 4: Identifying Remote-Mounted ICM Terminals
A8 Check COIL PWR At Coil
A9 Check COIL- Signal
A10 Check For Spark
A11 Check Spark Plugs
A12 Check For CMP Power At CMP Sensor
A13 Check For PIP From CMP Sensor
A14 Check PIP With ICM Disconnected
A15 Check PIP With PCM Disconnected
A16 Check PIP A To PCM For Short To Power
A17 Check PIP B To ICM For Short To Power
A18 Check PIP For Short To Ground
  1. NOTE: If engine starts in step 19), continue testing.
A19 Check For SPOUT In Harness
A20 Check For SPOUT High
A21 Check For Short To Power In SPOUT
A22 Check For Short To Ground In SPOUT
A23 Check For Short To Ground In SPOUT Harness
A24 Check For Open PIP
A25 Check IGN GND At PCM
A26 Check IGN GND At CMP Sensor
A27 Check PIP A At CMP Sensor
A28 Check For COIL- Open In Harness
A29 Check COIL- For Short To Power
A30 Check COIL- For Short To Ground
A31 Check GND At ICM
A32 Check GND At CMP Sensor

PINPOINT TEST AAA: NO START WITH SPOUT CONNECTOR DISCONNECTED

(REMOTE-MOUNTED ICM)

Pinpoint Test A

A1 Check For Codes
A2 Check Battery
A3 Check For PIP Signal
  1. WARNING: DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously.
A5 Check PIP Signal From PIP Sensor

PINPOINT TEST B: CONTINUOUS MEMORY CODE 212

Pinpoint Test B

B1 Connect Test Equipment
B2 Check IDM Signal At PCM
B3 Check For Short To Power In IDM
B4 Check For Short To Ground In IDM
B5 Check For Open IDM

PINPOINT TEST C KOER CODE 213: TIMING INCORRECT, SPOUT OPEN

POOR FUEL ECONOMY OR POOR DRIVEABILITY

Pinpoint Test C

C1 Check Base Timing
C2 Check Spark Advance
C3 Check For Good SPOUT To ICM
C4 Check For SPOUT Open In Harness

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