Engine Controls - System/component Tests - Eec-Iv: Diagnosis Ford Escort V facelift

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

Diagnostic Aids

Major difference between Computer Controlled Dwell (CCD) and non-CCD systems is CCD system does not receive a start signal from ignition switch at ICM (terminal No. 4) during engine cranking. CCD systems send an additional coil negative (-)/tach circuit signal to PCM from ignition module (terminal No. 4) labeled Filtered Tach Output (FTO). 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 10-14 volts.
6. Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to appropriate H - EEC-IV TESTS W/O CODES article in the ENGINE PERFORMANCE Section.

Scheme 16

Scheme 17

1. Ensure that SPARK OUTPUT CHECK has been performed. See IGNITION CHECKS in BASIC TESTING article in the ENGINE PERFORMANCE Section article. Turn ignition off. Connect EEC-IV Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and ICM. (Scheme 16) Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in NORMAL position. Apply DI overlay on breakout box. DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously. (Scheme 16): EEC-IV Diagnostic Cable (007-00097) Installation (DI)
2. Turn ignition on. Put DVOM on DC voltage scale. Measure voltage between J5 (TFI PWR) and J7 (B -). If voltage is less than 10 volts DC, repair open in TFI PWR circuit to ICM. If voltage is greater than 10 volts DC, put DVOM on AC voltage scale.
3. Measure voltage between J7 (B -) and J15 (PIP) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 5). If voltage is 3.0-8.5 volts AC, measure voltage between J7 (B -) and J10 (SPOUT) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 9). If voltage is 3.0-8.5 volts AC, turn ignition off. Connect diagnostic cable to ignition coil wiring harness. Leave ignition coil disconnected.
4. Set DVOM on DC voltage scale. Turn ignition on. Measure voltage between J2 (COIL PWR) and J7 (B -). If voltage is not greater than 10 volts DC, repair open circuit in ignition coil circuit. If voltage is greater than 10 volts DC, turn ignition off. Connect B + lead of diagnostic cable to positive battery terminal. Connect test light to J1 (B +) and J3 (COIL-). Crank engine. If test light does not flash brightly, go to step 16). If test light flashes brightly, replace coil, and perform QUICK TEST. See G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section.
5. If voltage is not 3.0-8.5 volts AC in step 3), turn diagnostic cable switch to PIP OPEN position. Measure voltage between J7 (B -) and J15 (PIP) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 8). If voltage is 3.0-8.5 volts AC, turn ignition off.
6. Turn diagnostic cable switch to NORMAL position. Put DVOM on DC voltage scale. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness. Turn ignition on. Measure voltage between J7 (B -) and J15 (PIP). If voltage is greater than 0.5 volt, repair short in PIP circuit between PCM and ICM.
7. If voltage is less than 0.5 volt, turn ignition off. Measure resistance between J7 (B -) and J15 (PIP). If resistance is greater than 10,000 ohms, replace PCM. If resistance is 10,000 ohms or less, repair short in PIP circuit between PCM and ICM.
8. If voltage is not 3.0-8.5 volts AC in step 5), turn ignition off. Remove ICM from distributor. Measure resistance of ICM circuits. See ICM RESISTANCE table. (Scheme 17) If resistance is not as specified, replace ICM. If resistance is as specified, check stator and wiring inside distributor. Repair as necessary. If stator and wiring are okay, replace Camshaft Position (CMP) sensor. ICM RESISTANCE Between Terminals Ohms PIP (In) & PIP (Out) Less Than 150 PIP PWR & TFI PWR Less Than 150 GND & PIP (In) Greater Than 500 GND & IGN GND Less Than 5 PIP (In) & PIP PWR 900-1500 (Scheme 17): Identifying Distributor Mounted ICM & Connector Terminals
9. If voltage is not 3.0-8.5 volts AC in step 3), turn diagnostic cable switch to SPOUT OPEN position. Measure voltage between J7 (B -) and J10 (SPOUT) while cranking engine. If voltage is 3.0-8.5 volts AC, replace ICM.
10. If voltage is not 3.0-8.5 volts AC, turn ignition off. Turn diagnostic cable switch to NORMAL position. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness. Turn ignition on. Measure voltage between J7 (B -) and J10 (SPOUT).
11. If voltage is less than 0.5 volt DC, go to step 12). If voltage is greater than 0.5 volt DC, turn ignition off. Disconnect PCM. Turn ignition on. Measure voltage between J7 (B -) and J10 (SPOUT). If voltage is less than 0.5 volt DC, go to step 13). If voltage is greater than 0.5 volt DC, repair short to power in SPOUT circuit between PCM and ICM.
12. Turn ignition off. Measure resistance between test pin J7 (B -) and J10 (SPOUT). If resistance is less than 10,000 ohms, disconnect PCM. Measure resistance between J7 (B -) and J10 (SPOUT). If resistance is still less than 10,000 ohms, repair short to ground in SPOUT circuit between PCM and ICM. If resistance is greater than 10,000 ohms, go to step 13).
13. Measure resistance between breakout box test pin J15 (PIP) and PCM wiring harness connector terminal No. 56 (PIP). If resistance is greater than 5 ohms, repair open in PIP circuit between PCM and ICM. If resistance is less than 5 ohms, go to next step.
14. Connect diagnostic cable to ICM. Measure resistance between breakout box test pin J7 (B -) and PCM wiring harness connector terminal No. 16 (IGN GND). If resistance is less than 5 ohms, replace PCM. If resistance is greater than 5 ohms, disconnect diagnostic cable from ICM.
15. Measure resistance between breakout box test pin J9 (IGN GND) and PCM wiring harness connector terminal No. 16 (IGN GND). If resistance is less than 5 ohms, replace ICM. If resistance is greater than 5 ohms, repair open in IGN GND circuit between PCM and ICM.
16. If test light does not flash brightly in step 4), disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness. Disconnect diagnostic cable from positive battery cable. Measure resistance between J3 (COIL-) and J4 (COIL-).
17. If resistance is greater than 5 ohms, repair open in COIL- circuit between ignition coil and ICM. If resistance is less than 5 ohms, put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J3 (COIL-) and J7 (B -). If voltage is greater than 5.5 volts DC, repair short to power in COIL- circuit between ignition coil and ICM. If voltage is less than 5.5 volts DC, go to next step.
18. Turn ignition off. Measure resistance between J3 (COIL-) and J7 (B -). If resistance is less than 10,000 ohms, repair short in COIL- circuit between ignition coil and ICM. If resistance is greater than 10,000 ohms, replace ICM.

Distributor Mounted ICM System Diagram (2.3L HSC & 3.0L). Scheme 18

Distributor Mounted ICM System Diagram (Mustang 5.0L). Scheme 19

Scheme 20

1. Ensure that SPARK OUTPUT CHECK has been performed. See IGNITION CHECKS in BASIC TESTING article in the ENGINE PERFORMANCE Section. Turn ignition off. Connect EEC-IV Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and ICM. (Scheme 16) Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in NORMAL position. Apply DI overlay on breakout box. DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously.
2. Turn ignition on. Put DVOM on DC voltage scale. Measure voltage between J5 (TFI PWR) and J7 (B -). If voltage is less than 10 volts DC, repair open in TFI PWR circuit to ICM. (Scheme 21) If voltage is greater than 10 volts DC, put DVOM on AC voltage scale.
3. Measure voltage between J7 (B -) and J15 (PIP) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 6). If voltage is 3.0-8.5 volts AC, measure voltage between J7 (B -) and J10 (SPOUT) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 13). (Scheme 20): Identifying Remote Mounted ICM & Connector Terminals
4. If voltage is 3.0-8.5 volts AC, turn ignition off. Connect diagnostic cable to ignition coil wiring harness. Leave ignition coil disconnected. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J2 (COIL PWR) and J7 (B -). If voltage is not greater than 10 volts DC, repair open in ignition coil circuit.
5. If voltage is greater than 10 volts DC, turn ignition off. Connect B + lead of diagnostic cable to positive battery terminal. Connect test light to J1 (B +) and J3 (COIL-). Crank engine. If test light does not flash brightly, go to step 19). If test light flashes brightly, replace ignition coil.
6. If voltage between J7 and J15 is not 3.0-8.5 volts AC in step 3), connect diagnostic cable CMP (PIP) sensor tee. Put DVOM on DC voltage scale. Measure voltage between J7 (B -) and J22 (PIP PWR) on 8-pin connector type or J7 (B -) and J27 (CMP PWR) on 4-pin connector type. If voltage is not greater than 10 volts DC, repair open in PIP PWR circuit.
7. If voltage is greater than 10 volts DC, turn diagnostic cable switch to PIP OPEN position. Put DVOM on AC voltage scale. While cranking engine, measure voltage between J7 (B -) and J34 (PIP A) on 8-pin connector type or J7 (B -) and J13 (PIP) on 4-pin connector type. If voltage is not 3.0-8.5 volts AC, check PIP wiring and connector. If wiring and connector are okay, replace Camshaft Position (CMP) sensor.
8. If voltage is 3.0-8.5 volts AC, turn ignition off. Turn diagnostic cable switch to NORMAL position. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness. While cranking engine, measure voltage between J7 (B -) and J34 (PIP A) on 8-pin connector type or J7 (B -) and J13 (PIP) on 4-pin connector type.
9. If voltage is 3.0-8.5 volts AC, replace ICM. If voltage is not 3.0-8.5 volts AC, disconnect PCM. While cranking engine, measure voltage between J7 (B -) and J34 (PIP A) on 8-pin connector type or J7 (B -) and J13 (PIP) on 4-pin connector type. If voltage is 3.0-8.5 volts AC, replace PCM.
10. If voltage is not 3.0-8.5 volts AC, turn ignition off. Disconnect diagnostic cable from CMP sensor. Leave diagnostic cable attached to CMP sensor wiring harness. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J7 (B -) and J34 (PIP A) on 8-pin connector type or J7 (B -) and J13 (PIP) on 4-pin connector type.
11. If voltage is greater than 0.5 volt, repair PIP A circuit short to power between CMP sensor and PCM. If voltage is less than 0.5 volt, measure voltage between J7 (B -) and J41 (PIP B). If voltage is greater than 0.5 volt, repair PIP B circuit short to power between CMP sensor and PCM. If voltage is less than 0.5 volt, turn ignition off.
12. Measure resistance between J7 (B -) and J41 (PIP B). If resistance is greater than 10,000 ohms, repair short to ground in PIP A circuit between PCM and CMP sensor. If resistance is less than 10,000 ohms, repair short to ground in PIP B circuit between CMP sensor and ICM. NOTE: If engine starts in step 13), continue testing.
13. If voltage between J7 and J10 is not 3.0-8.5 volts AC in step 3), turn diagnostic cable switch to SPOUT OPEN position. Measure voltage between J7 (B -) and J10 (SPOUT) while cranking engine. If voltage is 3.0-8.5 volts AC, replace ICM. If voltage is not 3.0-8.5 volts AC, turn ignition off. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness.
14. Turn diagnostic cable switch to NORMAL position. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J7 (B -) and J10 (SPOUT). If voltage is 0.5 volt DC or more, go to step 15). If voltage is less than 0.5 volt DC, disconnect PCM. Turn ignition on. Measure voltage between J7 (B -) and J10 (SPOUT). If voltage is less than 0.5 volt DC, go to step 16). If voltage is greater than 0.5 volt, repair short in SPOUT circuit between PCM and ICM.
15. If voltage is less than 0.5 volt DC in step 14), turn ignition off. Measure resistance between J7 (B -) and J10 (SPOUT). If resistance is greater than 10,000 ohms, go to step 16). If resistance is less than 10,000 ohms, disconnect PCM. Measure resistance between J7 (B -) and J10 (SPOUT). If resistance is still less than 10,000 ohms, repair short in SPOUT circuit between PCM and ICM.
16. Turn ignition off. Disconnect PCM. Measure voltage between J7(B -) and J56 (SPOUT). Go to step 18) if voltage is not 3.0-8.5 volts AC. If voltage is 3.0-8.5 volts AC, turn ignition off. Connect diagnostic cable to ICM. Measure resistance between breakout box test pin J7 (B -) and PCM wiring harness connector terminal No. 16 (IGN GND).
17. If resistance is less than 5 ohms, replace PCM. If resistance is greater than 5 ohms, connect diagnostic cable to CMP sensor. Measure resistance between J7 (B -) and J35 (IGN GND) on 8-pin connector type or J7 (B -) and J19 (IGN GND) on 4-pin connector type. If resistance is 5 ohms or less, repair open in IGN GND circuit between PCM and CMP sensor. If resistance is greater than 5 ohms, replace CMP sensor.
18. If voltage is 3.0-8.5 volts AC in step 16), turn diagnostic cable switch to PIP OPEN position. Connect diagnostic cable between CMP sensor and sensor wiring harness connector. Crank engine while measuring voltage between J7 (B -) and J34 (PIP A) on 8-pin connector type or J7 (B -) and J13 (PIP) on 4-pin connector type. If voltage is 3.0-8.5 volts AC, repair PIP circuit between CMP sensor and PCM. If voltage is not 3.0-8.5 volts AC, replace CMP sensor.
19. If test light does not flash brightly in step 5), turn ignition off. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness. Disconnect diagnostic cable from positive battery cable. Measure resistance between J3 (COIL-) and J4 (COIL-).
20. If resistance is greater than 5 ohms, repair open in COIL- circuit between ignition coil and ICM. Repeat QUICK TEST. See G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section. If resistance is less than 5 ohms, measure resistance between J3 (COIL-) and J7 (B -).
21. If resistance is less than 10,000 ohms, put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J3 (COIL-) and J7 (B -). If voltage is greater than 5.5 volts DC, repair short to power in COIL- circuit between ignition coil and ICM. If voltage is less than 5.5 volts DC, go to next step.
22. Turn ignition off. Measure resistance between J3 (COIL-) and J7 (B-). If resistance is less than 10,000 ohms, repair COIL- circuit short to ground between ignition coil and ICM. If resistance is greater than 10,000 ohms, go to next step.
23. Leave ignition off. Measure resistance between J7 (B -) and J9 (GND). If resistance is less than 5 ohms, replace ICM. If resistance is greater than 5 ohms, connect diagnostic cable between CMP sensor and sensor wiring harness connector.
24. Measure resistance between J7 (B -) and J28 (GND) on 8-pin connector type or J7 (B -) and J26 (GND) on 4-pin connector type. If resistance is 5 ohms or less, repair open in GND circuit between CMP sensor and ICM. If resistance is greater than 5 ohms, check ground circuit. If ground circuit is okay, replace CMP sensor. Perform QUICK TEST. See G - EEC-IV TESTS W/CODES article in the ENGINE PERFORMANCE Section.

ICM System Diagram (3.8L Ex. SC, Cougar/Thunderbird 5.0L). Scheme 21

Following test equipment is necessary to complete ICM ignition system tests.

1. EI (Low Data Rate) Diagnostic Cable (007-00044)
2. Spark Tester (D81P-6666-A & D89P-6666-A)
3. Digital Volt-Ohmmeter (DVOM)
4. Remote Starter Switch
5. 2 EEC-IV Breakout Boxes (T83L-50-EEC-IV)
6. EEC-IV Breakout Box 2.3L Overlay
7. ICM Adapter Tachometer (007-00061)
8. Inductive Type Timing Light (DO NOT use advance knob, if equipped, as it will not work correctly with EI ignition systems.)
9. 12-Volt Test Light (Incandescent Type)
10. Test Light (LED Type) Or Logic Probe (LED Type)
11. ICM Tester (007-00071)
12. ICM Coil/Sensor Tester (007-00072)

Note. A 12-volt incandescent test light should not be used to test CID, IDM, PIP or SPOUT circuit signals. It will load circuit and may cause incorrect measurements or faulty ICM/PCM operation.

PINPOINT TEST A is intended to diagnose no-start conditions. PINPOINT TESTS B through F are intended to diagnose hard faults. Intermittent failures may be difficult to diagnose using these procedures.

EEC-IV Breakout Box (T83L-50-EEC-IV) connected to EI (Low Data Rate) Diagnostic Cable (007-00044) is referred to as breakout box. If a second breakout box is connected to PCM wiring harness connector, it will be referred to as second breakout box. This setup allows testing of ignition components and wiring harness circuits.

Circuits are identified in all capitals, for example: PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix, for example: J31 (PIP). This indicates test terminal number and circuit identification.

When the letter "I" follows the circuit identification, it implies circuit at ICM for example: J31 (PIP I). When the letter "S" follows the circuit identification, it implies circuit at Crankshaft Position (CKP) sensor for example: J33 (PIP S).

Note. All ignition voltage and resistance tests are performed at breakout box connected to diagnostic cable unless otherwise specified.

2.3L EI PINPOINT TEST INDEX

EI (Low Data Rate) Component Locations (Mustang 2.3L). Scheme 22

Low Data Rate - Diagnostic Cable (Mustang 2.3L). Scheme 23

Ignition System Pin Voltage Chart (Mustang 2.3L). Scheme 24

Ignition System Connector Terminal (Mustang 2.3L). Scheme 25

Ignition System Wiring Diagram (Mustang 2.3L). Scheme 26

ICM Signal Diagram (Mustang 2.3L). Scheme 27

PINPOINT TEST A

PINPOINT TEST B: CODE 222

PINPOINT TEST C: CODE 218

PINPOINT TEST D: CODE 224

PINPOINT TEST E: CODE 213 SPOUT CIRCUIT SHORTED OR OPEN

PINPOINT TEST F: CODE 213/412 OR NO CODES & LACK OF POWER

Following test equipment is necessary to complete EI system tests.

1. EI Diagnostic Cable (Rotunda 007-00044)
2. Spark Tester (D89P-6666-A)
3. Digital Volt-Ohmmeter (DVOM)
4. Remote Starter Switch
5. 2 Breakout Boxes (T83L-50-EEC-IV)
6. High Voltage Spark Tester (A spark plug with a broken side electrode is not sufficient to check for spark and may lead to incorrect results.)
7. Tachometer
8. Tachometer Adapter (Rotunda 007-00061)
9. Incandescent 12-Volt Test Light
10. Inductive Type Timing Light
11. EI Module Tester (007-00071, If Available)
12. EI Sensor/Coil Tester (007-00072, If Available)

Note. A 12-volt incandescent (high voltage) test light should not be used to test CID, IDM, PIP or SPOUT circuit signals.

PINPOINT TEST A is designed for a no-start condition. PINPOINT TESTS B through E are designed to identify hard faults. PINPOINT TESTS F and G are used to search for intermittent failures. 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 series, 70 series or 88). 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 voltage checks, ground readings are defined as a value of less than 1.0 volt. Battery voltage is defined as a value of 10-14 volts.
5. Circuits are identified in all capitals, for example: PIP. Manufacturer's breakout box overlay test terminals are identified by a J prefix, for example: J31 (PIP). This indicates test terminal number and circuit identification. When the letter "I" follows the circuit identification, it implies PIP circuit at ICM for example: J31 (PIP I). When the letter "S" follows the circuit identification, it implies PIP circuit at ICM for example: J33 (PIP S).
6. Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to H - EEC-IV TESTS W/O CODES article in the ENGINE PERFORMANCE Section.

3.0L SHO & 3.8L SC EI PINPOINT TEST INDEX

EI Diagnostic Cable (3.0L SHO, 3.2L & 3.8L SC). Scheme 28

ICM Terminals (3.0L SHO, 3.2L & 3.8L SC). Scheme 29

EI System Pin Voltage Chart (3.0L SHO, 3.2L & 3.8L SC). Scheme 30

EI System Connector Terminal (3.0L SHO & 3.2L). Scheme 31

EI System Connector Terminal (3.8L SC). Scheme 32

EI Signal Diagram (3.0L SHO, 3.2L & 3.8L SC). Scheme 33

EI Circuits (3.0L SHO, 3.2L & 3.8L SC). Scheme 34

PINPOINT TEST B: CODE 212

PINPOINT TEST C: CODE 214

PINPOINT TEST D: CODE 215, 216 OR 217

PINPOINT TEST E: CODE 49 OR 213

1. An engine analyzer is used to diagnose problems in secondary side of ignition system.
2. Visually inspect engine compartment to ensure vacuum hoses and spark plug wires are properly routed and securely connected.
3. Examine all wiring harnesses and connectors for insulation damage and burned, overheated, loose and broken conditions.
4. Ensure battery is fully charged and all accessories are turned off during testing.
5. Use an engine analyzer or lab scope and EI Adapter (Rotunda 007-00044) in these testing procedures.

Note. To provide accurate results, maintaining engine analyzer calibration is essential. Refer to equipment manual. If manual is not available, an estimate of calibration can be made by connecting Spark Tester (D81P-6666-A) to a properly operating ignition system and measuring firing voltage of spark tester. Spark tester firing voltage should be approximately 28 k/volts. DO NOT include firing voltage of rotor-to-cap gap.

Identifying EI Secondary Voltage Scope Patterns. Scheme 35

PINPOINT TEST G

Following equipment should be used in these test procedures.

1. EI Diagnostic Cable (Rotunda 007-00059)
2. Spark Tester (Neon Bulb Type)
3. Volt-Ohmmeter (Rotunda 007-00001)
4. Remote Starter Switch
5. 2 Breakout Boxes (T83L-50-EEC-IV)
6. Spark Tester (D81P-6666-A)
7. Inductive Timing Light
8. Test Light (Led Type) Or Logic Probe (Led Type)

Following information should be noted during testing

1. When making measurements on a wiring harness, perform both a visual inspection and a continuity test. Inspect terminal connector pins for damage and corrosion when directed to remove a connector.
2. When checking voltage drop to GROUND, circuit must have a voltage drop of less than 1.0 volt.
3. Battery voltage, COIL PWR or VPWR is any voltage reading within 2 volts of actual battery voltage.
4. Spark timing will vary at idle due to feedback spark strategy used to control idle speed.
5. DO NOT connect positive lead of diagnostic cable or CKP-CKP sensor tee until directed to do so.
6. DO NOT connect use incandescent light to test CKP+, CKP-, IDM, PIP or SPOUT circuits.
7. EEC-IV Breakout Box (T83L-50-EEC-IV) connected to EI diagnostic cable is referred to as breakout box. If a second breakout box is connected to PCM wiring harness connector, it will be referred to as second breakout box. This setup allows testing of ignition components and wiring harness circuits. Circuits are identified in all capitals, for example: PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix, for example: J31 (PIP). This indicates test terminal number and circuit identification. When the letter "I" follows the circuit identification, it implies circuit at ICM for example: J31 (PIP I). When the letter "S" follows the circuit identification, it implies circuit at Crankshaft Position (CKP) sensor for example: J33 (PIP S).

1.9L EI PINPOINT TEST INDEX

EI Diagnostic Cable Diagram (1.9L). Scheme 36

Identifying EI Circuits (1.9L). Scheme 37

EI System Connector Terminal & Component ID (1.9L). Scheme 38

ICM Pin Voltage Chart (1.9L). Scheme 39

EI Signal Diagram (1.9L). Scheme 40

Note. Steps in pinpoint tests are designed to correct one ignition failure at a time. When a component is replaced or service is completed, remove all test equipment. Reconnect all components, and perform QUICK TEST. See G - EEC-IV TESTS W/ CODES article in the ENGINE PERFORMANCE Section.

PINPOINT TEST C: CODE 213, LACK OF POWER OR POOR FUEL ECONOMY

PINPOINT TEST D: CODE 215 OR 216

Following equipment should be used in these test procedures.

1. EI Diagnostic Cable (Rotunda 007-00059)
2. Spark Tester (Neon Bulb Type)
3. Volt-Ohmmeter (Rotunda 007-00001)
4. Remote Starter Switch
5. 2 Breakout Boxes (T83L-50-EEC-IV)
6. Spark Tester (D81P-6666-A)
7. Inductive Timing Light (EI Compatible)
8. Test Light (LED Type) Or Logic Probe (LED Type)

Circuits are identified in all capital letters (acronyms). For example, Profile Ignition Pickup is identified as PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix. For example, J31 (PIP). The J31 indicates that the measurement is to be taken at terminal No. 31 at the breakout box. The (PIP) indicates that the Profile Ignition Pickup circuit is being checked.

When the letter "I" follows the circuit identification, it implies that the measurement is being taken at the ICM. For example, J31 (PIP I). The (PIP I) implies that the measurement is of the PIP circuit at the ICM. When the letter "S" follows the circuit identification, it implies that the measurement is being taken at the CKP sensor. For example, J32 (CKP+ S). The (CKP+ S) implies that the measurement is of the CKP sensor positive circuit at the CKP sensor.

When the letter "C" follows the circuit identification, it implies that the measurement is being taken at the coil. For example, J10 (C3C). The (C3C) implies that the measurement is of the C3 circuit at the coil pack.

The following information should also be noted during testing

1. When checking a wiring harness, perform both a visual inspection and a continuity test. Inspect terminal connector pins for damage, bending, spreading and corrosion when directed to remove a connector.
2. Spark timing adjustments are not possible. Timing is controlled by ICM with input from PCM.
3. When checking voltage drop to GROUND, circuit must have a voltage drop of less than one volt.
4. Battery voltage (VBAT) is any voltage reading within 2 volts of actual battery voltage.
5. EEC-IV Breakout Box (T83L-50-EEC-IV) connected to EI diagnostic cable is referred to as breakout box or EI breakout box. If a second breakout box is connected to PCM wiring harness connector, it will be referred to as second or PCM breakout box. This setup allows testing of EI components and wiring harness circuits.

Note. A 12-volt incandescent (high voltage) test light should not be used to test circuit signals. It will load circuit and may cause incorrect measurements or faulty EI/PCM operation (engine stall).

3.0L FLEXIBLE FUEL EI PINPOINT TEST INDEX

EI Diagnostic Cable Diagram (3.0L Flexible Fuel). Scheme 41

EI Wiring Diagram (3.0L Flexible Fuel). Scheme 42

EI System Pin Voltage Chart (3.0L Flexible Fuel). Scheme 43

EI Signal Diagram (3.0L Flexible Fuel). Scheme 44

EI Block Diagram (3.0L Flexible Fuel). Scheme 45

PINPOINT TEST B: CODE 212 OR 226

PINPOINT TEST D: CODE 215, 216, 217 OR 232

Following equipment should be used in these test procedures.

1. EI Diagnostic Cable (Rotunda 007-00059)
2. Spark Tester (Neon Bulb Type)
3. Volt-Ohmmeter (Rotunda 007-00001)
4. Remote Starter Switch
5. 2 Breakout Boxes (T83L-50-EEC-IV)
6. Spark Tester (D81P-6666-A)
7. Inductive Timing Light
8. Test Light (LED Type) Or Logic Probe (LED Type)

Circuits are identified in all capital letters (acronyms). For example, Profile Ignition Pickup is identified as PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix. For example, J31 (PIP). The J31 indicates that the measurement is to be taken at terminal No. 31 at the breakout box. The (PIP) indicates that the Profile Ignition Pickup circuit is being checked.

When the letter "I" follows the circuit identification, it implies that the measurement is being taken at the ICM. For example, J31 (PIP I). The (PIP I) implies that the measurement is of the PIP circuit at the ICM.

When the letter "S" follows the circuit identification, it implies that the measurement is being taken at the CKP sensor. For example, J32 (CKP+ S). The (CKP+ S) implies that the measurement is of the CKP sensor positive circuit at the CKP sensor. When the letter "C" follows the circuit identification, it implies that the measurement is being taken at the coil. For example, J10 (LC3C). The (LC3C) implies that the measurement is of the C3 circuit at the left coil pack.

The following information should also be noted during testing

1. When checking a wiring harness, perform both a visual inspection and a continuity test. Inspect terminal connector pins for damage, bending, spreading and corrosion when directed to remove a connector.
2. Spark timing adjustments are not possible. Timing is controlled by ICM with input from PCM.
3. When checking voltage drop to GROUND, circuit must have a voltage drop of less than one volt.
4. Battery voltage (VBAT) is any voltage reading within 2 volts of actual battery voltage.
5. EEC-IV Breakout Box (T83L-50-EEC-IV) connected to EI diagnostic cable is referred to as breakout box or EI breakout box. If a second breakout box is connected to PCM wiring harness connector, it will be referred to as second or PCM breakout box. This setup allows testing of EI components and wiring harness circuits.

Note. A 12-volt incandescent (high voltage) test light should not be used to test circuit signals. It will load circuit and may cause incorrect measurements or faulty EI/PCM operation (engine stall).

4.6L EI PINPOINT TEST INDEX

EI Diagnostic Cable Diagram (4.6L). Scheme 46

EI Wiring Diagram (4.6L). Scheme 47

EI System Pin Voltage Chart (4.6L). Scheme 48

EI Signal Diagram (4.6L). Scheme 49

EI Block Diagram (4.6L). Scheme 50

PINPOINT TEST D: CODE 215, 216, 217 OR 238