Engine Controls - System/component Tests - Eec-Iv: Diagnosis

TEST EQUIPMENT

Following test equipment should be used in TFI-IV ignition system tests.

Spark Tester (D81P-6666-A Or D89P-6666-A)
Digital Volt-Ohmmeter (DVOM)
12-Volt Test Light
Remote Starter Switch
EEC-IV Diagnostic Cable (007-00097)
EEC-IV Breakout Box (T83L-50-EEC-IV)
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 TFI-IV module (terminal No. 4) during engine cranking. CCD systems send an additional coil negative (-)/tach circuit signal to ECA from ignition module (terminal No. 4) labeled Filtered Tach Output (FTO). Following information should be noted during testing

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.
When instructed to inspect a wiring harness, perform both a visual inspection and a continuity test.
When making measurements on a wiring harness or connector, perform a wiggle test while measuring.
When making voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
When making voltage checks, ground readings are defined as a value of less than one volt. Battery voltage is defined as a value of 10-14 volts.
Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to TESTS W/O CODES - EEC-IV article in the ENGINE PERFORMANCE section.

Scheme 152

Scheme 152: NO SPARK FROM COIL SECONDARY (DIST. MOUNTED TFI-IV MODULE)

Scheme 153

Turn ignition off. Connect EEC-IV Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and TFI-IV module. (Scheme 152) Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in NORMAL position. Apply TFI-IV overlay on breakout box. WARNING: DO NOT connect EEC-IV Diagnostic Cable and ECA to EEC-IV Breakout Box simultaneously. (Scheme 152): EEC-IV Diagnostic Cable (007-00097) Installation Arrangement
Turn ignition on. Put DVOM on DC voltage scale. Measure voltage between J5 (TFI PWR) and J7 (BAT-). If voltage is less than 10 volts DC, repair open in TFI PWR circuit to TFI-IV module. If voltage is more than 10 volts DC, put DVOM on AC voltage scale.
Measure voltage between J7 (BAT-) and J15 (PIP) while cranking engine. If voltage is not 3.0-8.5 volts, go to step 5). If voltage is 3.0-8.5 volts AC, measure voltage between J7 (BAT-) 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.
Set DVOM on DC voltage scale. Turn ignition on. Measure voltage between J2 (VBAT C) and J7 (BAT-). 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 BAT+ lead of diagnostic cable to positive battery terminal. Connect test light to J1 (BAT+) 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 TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section.
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 (BAT-) 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.
Turn diagnostic cable switch to NORMAL position. Put DVOM on DC voltage scale. Disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness. Turn ignition on. Measure voltage between J7 (BAT-) and J15 (PIP). If voltage is more than 0.5 volt, repair short in PIP circuit between ECA and TFI-IV module.
If voltage is less than 0.5 volt, turn ignition off. Measure resistance between J7 (BAT-) and J15 (PIP). If resistance is more than 10,000 ohms, replace ECA. If resistance is 10,000 ohms or less, repair short in PIP circuit between ECA and TFI-IV module.
If voltage is not 3.0-8.5 volts AC in step 5), turn ignition off. Remove TFI-IV module from distributor. Measure resistance of TFI-IV module circuits. See «TFI-IV MODULE RESISTANCE»(ref-22735-S18308809222001010300000). (Scheme 153) If resistance is not as specified, replace TFI-IV module. If resistance is as specified, check stator and wiring inside distributor. Repair as necessary. If stator and wiring are okay, replace PIP sensor. TFI-IV MODULE 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 153): Distributor Mounted TFI-IV Ignition Module & Connector Terminal ID
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 (BAT-) and J10 (SPOUT) while cranking engine. If voltage is 3.0-8.5 volts AC, replace TFI-IV module.
If voltage is not 3.0-8.5 volts AC, turn ignition off. Turn diagnostic cable switch to NORMAL position. Disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness. Turn ignition on. Measure voltage between J7 (BAT-) and J10 (SPOUT).
If voltage is less than 0.5 volt DC, go to step 12). If voltage is more than 0.5 volt DC, turn ignition off. Disconnect ECA. Turn ignition on. Measure voltage between J7 (BAT-) and J10 (SPOUT). If voltage is less than 0.5 volt DC, go to step 13). If voltage is more than 0.5 volt DC, repair short to power in SPOUT circuit between ECA and TFI-IV module.
Turn ignition off. Measure resistance between test pin J7 (BAT-) and J10 (SPOUT). If resistance is less than 10,000 ohms, disconnect ECA. Measure resistance between J7 (BAT-) and J10 (SPOUT). If resistance is still less than 10,000 ohms, repair short to ground in SPOUT circuit between ECA and TFI-IV module. If resistance is greater than 10,000 ohms, go to step 13).
Measure resistance between breakout box test pin J15 (PIP) and ECA wiring harness connector terminal No. 56 (PIP). If resistance is greater than 5 ohms, repair open in PIP circuit between ECA and TFI-IV module. If resistance is less than 5 ohms, go to next step.
Connect diagnostic cable to TFI-IV module. Measure resistance between breakout box test pin J7 (BAT-) and ECA wiring harness connector terminal No. 16 (IGN GND). If resistance is less than 5 ohms, replace ECA. If resistance is greater than 5 ohms, disconnect diagnostic cable from TFI-IV module.
Measure resistance between breakout box test pin J9 (IGN GND) and ECA wiring harness connector terminal No. 16 (IGN GND). If resistance is less than 5 ohms, replace TFI-IV module. If resistance is greater than 5 ohms, repair open in IGN GND circuit between ECA and TFI-IV module.
If test light does not flash brightly in step 4), disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness. Disconnect diagnostic cable from positive battery cable. Measure resistance between J3 (COIL-) and J4 (TFICOIL).
If resistance is greater than 5 ohms, repair open in COIL- circuit between ignition coil and TFI-IV module. If resistance is less than 5 ohms, measure resistance between J3 (COIL-) and J7 (BAT-). If resistance is less than 10,000 ohms, repair short in COIL- circuit between ignition coil and TFI-IV module.
If resistance is greater than 10,000 ohms, put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J3 (COIL-) and J7 (BAT-). If voltage is less than 5.5 volts DC, replace TFI-IV module. If voltage is greater than 5.5 volts DC, repair short to power in (COIL-) circuit between ignition coil and TFI-IV module.

Dist. Mounted TFI-IV Diagram (2.3L except Mustang & 3.0L except Taurus SHO). Scheme 154

Scheme 154: Dist. Mounted TFI-IV Diagram (2.3L except Mustang & 3.0L except Taurus SHO)

Dist. Mounted TFI-IV Diagram (Mark VII & Mustang 5.0L). Scheme 155

Scheme 155: Dist. Mounted TFI-IV Diagram (Mark VII & Mustang 5.0L)

Scheme 156

Scheme 156: NO SPARK FROM COIL SECONDARY (REMOTE MOUNTED TFI-IV)

Turn ignition off. Connect EEC-IV Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and TFI-IV module. (Scheme 152) Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in NORMAL position. Apply TFI-IV overlay on breakout box. WARNING: DO NOT connect EEC-IV Diagnostic Cable and ECA to EEC-IV Breakout Box simultaneously.
Turn ignition on. Put DVOM on DC voltage scale. Measure voltage between J5 (TFI PWR) and J7 (BAT-). If voltage is less than 10 volts DC, repair open in TFI PWR circuit to TFI-IV module. (Scheme 156) If voltage is greater than 10 volts DC, put DVOM on AC voltage scale.
Measure voltage between J7 (BAT-) 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 (BAT-) and J10 (SPOUT) while cranking engine. If voltage is not 3.0-8.5 volts AC, go to step 13).
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 (VBAT C) and J7 (BAT-). If voltage is not greater than 10 volts DC, repair open in ignition coil circuit.
If voltage is greater than 10 volts DC, turn ignition off. Connect BAT+ lead of diagnostic cable to positive battery terminal. Connect test light to J1 (BAT+) and J3 (COIL-). Crank engine. If test light does not flash brightly, go to step 19). If test light flashes brightly, replace ignition coil.
If voltage between J7 and J15 is not 3.0-8.5 volts AC in step 3), connect diagnostic cable to PIP sensor. Put DVOM on DC voltage scale. Measure voltage between J7 (BAT-) and J22 (PIP PWR) on 8-pin connector type or J7 (BAT-) and J27 (PIP PWR) on 4-pin connector type. If voltage is not greater than 10 volts DC, repair open in PIP PWR circuit.
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 (BAT-) and J34 (PIP A) on 8-pin connector type or J7 (BAT-) 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 PIP sensor.
If voltage is 3.0-8.5 volts AC, turn ignition off. Turn diagnostic cable switch to NORMAL position. Disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness. While cranking engine, measure voltage between J7 (BAT-) and J34 (PIP A) on 8-pin connector type or J7 (BAT-) and J13 (PIP) on 4-pin connector type.
If voltage is 3.0-8.5 volts AC, replace TFI-IV module. If voltage is not 3.0-8.5 volts AC, disconnect ECA. While cranking engine, measure voltage between J7 (BAT-) and J34 (PIP A) on 8-pin connector type or J7 (BAT-) and J13 (PIP) on 4-pin connector type. If voltage is 3.0-8.5 volts AC, replace ECA.
If voltage is not 3.0-8.5 volts AC, turn ignition off. Disconnect diagnostic cable from PIP sensor. Leave diagnostic cable attached to PIP sensor wiring harness. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J7 (BAT-) and J34 (PIP A) on 8-pin connector type or J7 (BAT-) and J13 (PIP) on 4-pin connector type.
If voltage is greater than 0.5 volt, repair PIP A circuit between PIP sensor and ECA. If voltage is less than 0.5 volt, measure voltage between J7 (BAT-) and J41 (PIP B). If voltage is greater than 0.5 volt, repair PIP B circuit between PIP sensor and ECA. If voltage is less than 0.5 volt, turn ignition off.
Measure resistance between J7 (BAT-) and J41 (PIP B). If resistance is greater than 10,000 ohms, repair short in PIP A circuit between ECA and PIP sensor. If resistance is less than 10,000 ohms, repair short in PIP B circuit between PIP sensor and TFI-IV module. NOTE: If engine starts in step 13), continue testing.
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 (BAT-) and J10 (SPOUT) while cranking engine. If voltage is 3.0-8.5 volts AC, replace TFI-IV module. If voltage is not 3.0-8.5 volts AC, turn ignition off. Disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness.
Turn diagnostic cable switch to NORMAL position. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J7 (BAT-) 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 ECA. Turn ignition on. Measure voltage between J7 (BAT-) 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 ECA and TFI-IV module.
If voltage is less than 0.5 volt DC in step 14), turn ignition off. Measure resistance between J7 (BAT-) and J10 (SPOUT). If resistance is greater than 10,000 ohms, go to step 16). If resistance is less than 10,000 ohms, disconnect ECA. Measure resistance between J7 (BAT-) and J10 (SPOUT). If resistance is still less than 10,000 ohms, repair short in SPOUT circuit between ECA and TFI-IV module.
Turn ignition off. Disconnect ECA. Measure voltage between J7 (BAT-) 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 TFI-IV module. Measure resistance between breakout box test pin J7 (BAT-) and ECA wiring harness connector terminal No. 16 (IGN GND).
If resistance is less than 5 ohms, replace ECA. If resistance is greater than 5 ohms, connect diagnostic cable to PIP sensor. Measure resistance between J7 (BAT-) and J35 (PIP A) on 8-pin connector type or J7 (BAT-) and J19 (PIP) on 4-pin connector type. If resistance is greater than 5 ohms, replace PIP sensor.
If voltage is 3.0-8.5 volts AC in step 16), turn diagnostic cable switch to PIP OPEN position. Connect diagnostic cable between PIP sensor and sensor wiring harness connector. Crank engine while measuring voltage between J7 (BAT-) and J34 (PIP A) on 8-pin connector type or J7 (BAT-) and J13 (PIP) on 4-pin connector type. If voltage is 3.0-8.5 volts AC, repair PIP circuit between PIP sensor and ECA. If voltage is not 3.0-8.5 volts AC, replace PIP sensor.
If test light does not flash brightly in step 5), turn ignition off. Disconnect diagnostic cable from TFI-IV module. Leave diagnostic cable attached to TFI-IV module wiring harness. Disconnect diagnostic cable from positive battery cable. Measure resistance between J3 (COIL-) and J4 (TFI COIL).
If resistance is greater than 5 ohms, repair open in COIL- circuit between ignition coil and TFI-IV module. Repeat QUICK TEST. See TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section. If resistance is less than 5 ohms, measure resistance between J3 (COIL-) and J7 (BAT-). If resistance is less than 10,000 ohms, repair short in COIL- circuit between ignition coil and TFI-IV module.
If resistance is greater than 10,000 ohms, put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J3 (COIL-) and J7 (BAT-). If voltage is greater than 5.5 volts DC, repair short in COIL- circuit between ignition coil and TFI-IV module. If voltage is less than 5.5 volts DC, turn ignition off. Measure resistance between J7 (BAT-) and J9 (GND). If resistance is less than 5 ohms, replace TFI-IV module.
If resistance is greater than 5 ohms, connect diagnostic cable between PIP sensor and sensor wiring harness connector. Measure resistance between J7 (BAT-) and J28 (GND) on 8-pin connector type or J7 (BAT-) and J26 (GND) on 4-pin connector type. If resistance is greater than 5 ohms, replace PIP sensor. If resistance is 5 ohms or less, repair open in GND circuit between PIP sensor and TFI-IV module. Perform QUICK TEST. See TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section.

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

DIS Diagnostic Cable (Rotunda 007-00044)
Spark Tester (D81P-6666-A & D89P-6666-A)
Digital Volt-Ohmmeter (DVOM)
Remote Starter Switch
2 EEC-IV Breakout Boxes (T83L-50-EEC-IV)
EEC-IV Breakout Box 2.3L DP DIS Overlay
DIS/EDIS Adapter Tachometer (007-00061)
Inductive Type Timing Light (DO NOT use advance knob, if equipped, as it will not work correctly with DIS ignition systems.)
12-Volt Test Light (Incandescent Type)
Test Light (LED Type) Or Logic Probe (LED Type)
DIS Module Tester (007-00071)
DIS 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 DIS/ECA operation.

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 DIS diagnostic cable is referred to as breakout box or DIS breakout box. If a second breakout box is connected to ECA vehicle harness connector, it will be referred to as second breakout box or ECA breakout box. This setup allows testing of DIS components and vehicle harness circuits.

Circuits are identified in all capitals, for example: IGND = Ignition Ground. Manufacturers breakout box overlay is identified by a J prefix, for example: J2 (IGND D). This indicates test terminal number and circuit identification.

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

DIS Diagnostic Cable & Component Locations (Mustang 2.3L). Scheme 157

Scheme 157: DIS Diagnostic Cable & Component Locations (Mustang 2.3L)

DIS System Pin Voltages Chart (Mustang 2.3L). Scheme 158

Scheme 158: DIS System Pin Voltages Chart (Mustang 2.3L)

DIS System Wiring Diagram (Mustang 2.3L). Scheme 159

Scheme 159: DIS System Wiring Diagram (Mustang 2.3L)

DIS Signal Diagram (Mustang 2.3L). Scheme 160

Scheme 160: DIS Signal Diagram (Mustang 2.3L)

Application	Pinpoint Test
No Start & No Service Codes Present	A
Code 222 (CID Circuit Fault)	B
Code 218 (IDM High/Open Or Left Coil Open)	C
Code 224 (DPI High/Open Or SPOUT Fault)	D
Code 223 (DPI High/Open Or SPOUT Fault)	E
Code 213/412 (SPOUT Open Or Low)	F
No Codes & Lack Of Power	F

2.3L DIS PINPOINT TEST INDEX

PINPOINT TEST B: CODE 222

Pinpoint Test B

B1 Check For Spark During Cranking

B2 Verify Erratic Start

B3 Check CID At DIS Module

B4 Check CID At Crankshaft Sensor (KOER)

B5 Check VBAT At Crankshaft Sensor

B6 Check IGN GND At Crankshaft Sensor

NOTE: If a negative resistance value is obtained, reverse DVOM leads.

B7 Check CID At Crankshaft Sensor

B9 Check CID For Short To Power

B10 Check CID For Short To Ground

B11 Check CID Vane (Crankshaft Sensor)

B12 Check DPI Circuit

B15 Check IDM At DIS Module

B17 Check IDM For Short To Ground

B18 Check IDM For Short To Power

B19 Check IDM For Open Circuit

PINPOINT TEST C: CODE 218

Pinpoint Test C

C1 Check For Left Side Spark

C2 Check IDM Circuit (KOER)

C3 Check IDM To ECA Circuit Continuity (Key Off)

C4 Check IDM Circuit (KOEC)

C5 Check IDM For Short To Power (KOEO)

C6 Check IDM For Short To Ground (Key Off)

PINPOINT TEST D: CODE 224

Pinpoint Test D

D1 Check For Spark

D2 Check For Spark At Right Plug Wires

D3 Check Left Spark Plugs & Wires

WARNING: DO NOT connect ECA to DIS diagnostic cable; 60-pin connector on this harness may be connected to an additional breakout box only. ECA will be damaged if connected to DIS diagnostic cable.

D4 Check VBAT To Left Coil

D5 Check C3 Voltage At Coil Pack

D6 Check C4 Voltage At Coil Pack

D7 Check C3 Voltage At DIS Module

D8 Check C4 Circuit At DIS Module

D9 Check C3 Circuit At Coil Pack

D11 Check C4 For Short To Ground

NOTE: If a negative resistance value is obtained, reverse DVOM leads.

D12 Check C4 For Short To Ground In Harness

D13 Check C3 For Short To Ground

D14 Check C3 Circuit At Coil Pack

D15 Check C4 For Short To Ground

D16 Check C4 For Short To Power

D17 Check C3 Signal At Coil Pack

D18 Check C4 Signal At Coil Pack

D19 Check Right Spark Plugs & Wires

WARNING: DO NOT connect ECA to DIS diagnostic cable; 60-pin connector on this harness may be connected to an additional breakout box only. ECA will be damaged if connected to DIS diagnostic cable.

D20 Check VBAT For Open To Right Coil

D21 Check C1 At Coil Pack

D22 Check C2 For Short To Power

D23 Check C1 For Short To Power At DIS Module

D24 Check C2 For Short To Power At DIS Module

D25 Check C1 Circuit

D28 Check C1 For Short To Ground In DIS Module

D29 Check C2 For Short To Ground At Coil Pack

D32 Check DIS Module For Short To Power In C2

D33 Check C1 At Coil Pack

D34 Check C2 At Coil Pack

PINPOINT TEST E: CODE 223

Pinpoint Test E

E1 Check SPOUT At DIS Module

E2 Check Dual Plug Operation

E3 Check DPI Circuit Continuity

E4 Check DPI For Short To Power

E5 Force Dual Plug Command At DIS Module

E6 Check ECA Side Of SPOUT Connector (KOER)

E7 Check DIS Side Of SPOUT Connector

E8 Check ECA Side Of SPOUT Connector (KOEO)

DIS Spout Connector Terminal ID. Scheme 161

Scheme 161: DIS Spout Connector Terminal ID

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

Pinpoint Test F

F1 Check Timing At Idle

F2 Check Base Timing

F3 Check SPOUT At DIS Module

F4 Check Sensor/Trigger Wheel

F5 Check ECA Side Of SPOUT Connector

F6 Check SPOUT Circuit Continuity

F8 Isolate DIS Module

F9 Isolate ECA

F10 Check Circuit Continuity

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

DIS Diagnostic Cable (Rotunda 007-00044)
Spark Tester (D89P-6666-A)
Digital Volt-Ohmmeter (DVOM)
Remote Starter Switch
2 Breakout Boxes (T83L-50-EEC-IV)
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.)
Tachometer
Tachometer Adapter (Rotunda 007-00061; DIS/EDIS Compatible Or Equivalent Type)
Test Light (LED Type) Or Logic Probe (Led Type)
Inductive Type Timing Light
DIS Module Tester (007-00071, If Available)
DIS Coil & Sensor Tester (007-00072, If Available)

Note. A 12-volt incandescent (high voltage) test light should not be used to test CID or PIP circuit signals. It will load circuit and may cause faulty DIS/ECA operations (engine stall).

PINPOINT TEST A is designed for a no-start situation. 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

All voltage readings given in test procedures are based on values obtained using a standard DVOM such as Rotund (007-00001) or Fluke (20 or 70 Series). DO NOT use RMS type meter.
When instructed to inspect a wiring harness, perform both a visual inspection and a continuity test.
When making voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
When making voltage checks, ground readings are defined as a value of less than one volt. Battery voltage is defined as a value of 10-14 volts.
Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to TESTS W/O CODES - EEC-IV article in the ENGINE PERFORMANCE section.

Application	Pinpoint Test
No Start	A
Code 212	B
Code 214	C
Code 215, 216 Or 217	D
Code 49 Or 213	E
Misfire Under Load	F
Intermittent Miss Or Stall	G

3.0L SHO & 3.8L SC DIS PINPOINT TEST INDEX

DIS Diagnostic Cable & DIS Module Terminal Pins (3.0L SHO & 3.8L SC). Scheme 162

Scheme 162: DIS Diagnostic Cable & DIS Module Terminal Pins (3.0L SHO & 3.8L SC)

DIS System Pin Voltage Chart (3.0L SHO & 3.8L SC). Scheme 163

Scheme 163: DIS System Pin Voltage Chart (3.0L SHO & 3.8L SC)

DIS System Wiring Diagram (3.0L SHO). Scheme 164

Scheme 164: DIS System Wiring Diagram (3.0L SHO)

DIS System Wiring Diagram (3.8L SC). Scheme 165

Scheme 165: DIS System Wiring Diagram (3.8L SC)

DIS Signal Diagram (3.0L SHO & 3.8L SC). Scheme 166

Scheme 166: DIS Signal Diagram (3.0L SHO & 3.8L SC)

DIS Components & Circuits (3.0L SHO & 3.8L SC). Scheme 167

Scheme 167: DIS Components & Circuits (3.0L SHO & 3.8L SC)

WARNING

DO NOT connect ECA to DIS diagnostic cable; 60-pin connector on this harness may be connected to an additional breakout box only. If ECA is connected to DIS diagnostic cable, ECA may be damaged.