Test Equipment
Following test equipment should be used in DI 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
- Ignition Intermittent Analyzer (077-00075)
- 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
- 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 voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
- When making measurements on a wiring harness or connector, perform a wiggle test while measuring.
- 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.
- 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.
- 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 (2.0L)»(ref-23208) article.
Note. Start all diagnostics with QUICK TEST. See the appropriate TESTS W/CODES - EEC-IV (2.0L) article. Following tests are dependent on results and diagnostic trouble codes received during QUICK TEST.
| Application | Pinpoint Test/Step |
|---|---|
| No Start & No Codes Present | AA/1 |
| No Start & Code 211 Or 212 Present (PIP At PCM Fault) | AA/1 |
| Vehicle Runs Normal Until SPOUT | AAA/1 |
| Code 212 (Engine Runs, IDM Missing | B/1 |
| Code 213 (Timing Incorrect, SPOUT Open, Poor Fuel Economy Or Poor Driveability) | C/1 |
DISTRIBUTOR IGNITION PINPOINT TEST INDEX
Remote-Mounted ICM System Wiring Diagram (Probe). Scheme 1
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
- WARNING: DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously.
A6
Check PIP Signal
A7
Check SPOUT Signal
- Fig. 6: 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
- 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
- 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
Following equipment should be used in these test procedures.
- EI Diagnostic Cable (Rotunda 007-00059)
- Spark Tester (Neon Bulb Type)
- Volt-Ohmmeter (Rotunda 007-00001)
- Remote Starter Switch
- 2 Breakout Boxes (T83L-50-EEC-IV)
- Spark Tester (D81P-6666-A)
- Inductive Timing Light
- Test Light (LED Type) Or Logic Probe (LED Type)
Following information should be noted during testing
- 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.
- When checking voltage drop to Ground, circuit must have a voltage drop of less than one volt.
- Battery voltage, COIL PWR or VPWR is any voltage reading within 2 volts of actual battery voltage.
- Spark timing will vary at idle due to feedback spark strategy used to control idle speed.
- DO NOT connect positive lead of diagnostic cable or CKP-CKP sensor tee until directed to do so.
- DO NOT use incandescent light to test CKP+, CKP-, IDM, PIP or SPOUT circuits.
- 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 capital letters; 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 measurement is being taken at ICM, for example: J31 (PIP I). When the letter "S" follows the circuit ID, it implies measurement is being taken at Crankshaft Position Sensor (CKP); for example: J33 (PIP S).
- When the letter "C" follows the circuit identification, it implies measurement is being taken at the coil.
| Result | Pinpoint Test/Step | |
|---|---|---|
| No Start | ||
| No Codes/Codes Not Listed | A/1 | |
| Continuous Memory Code 211 | A/3 | |
| MIL Stays On During Engine Cranking | A/1 | |
| Engine Runs | ||
| Code 212 | B/1 | |
| Code 213 | C/1 | |
| Code 215 Or 216 | D/1 | |
EI PINPOINT TEST INDEX
EI Diagnostic Cable Diagram. Scheme 2
Identifying EI Circuits. Scheme 3
Identifying EI System Connector Terminal & Component. Scheme 4
ICM Pin Voltage Chart. Scheme 5
EI Signal Diagram. Scheme 6
| WARNING | DO NOT connect PCM to EI diagnostic cable. If PCM is connected to diagnostic cable, PCM may be damaged. Some tests may require a second breakout box to be connected to PCM 60 -pin connector. When a second breakout box is used, ensure PCM is disconnected. |
| WARNING | DO NOT bring a fluorescent trouble light (drop light) close to vehicle ignition system wiring. If key is on and CKP sensor is disconnected, light may cause ICM to fire ignition coil. |
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 the appropriate TESTS W/CODES - EEC-IV (2.0L) article.
PINPOINT TEST A - NO START
Pinpoint Test A
A1
No Start
A2
Check For Spark
A3
Check Spark Plugs & Wires
A4
Check Vehicle Performance
A5
Check PWR GND To ICM
A6
Check VPWR To ICM
A7
Check CKP (+) Bias At ICM
A8
Check CKP (+) Bias
A9
Check CKP (-) Bias (CKP Disconnected)
A10
Check CKP (-) For Short To Ground
A11
Check CKP (-) For Short To Power
A12
Check PIP At ICM
A13
Check For PIP Continuity To PCM
A14
Check IGN GND At ICM (PCM Disconnected)
A15
Check IGN GND Continuity To PCM (PCM Disconnected)
- NOTE: There is a 1000-ohm resistor built into the EI diagnostic wiring harness between J47 and Ignition Ground (IGN GND) circuit.
- Fig. 12: Checking IGN GND Continuity To PCM
A16
Check PWR GND At ICM
A17
Check PIP Signal At ICM (PIP Disconnected)
A18
Check PIP For Short To Ground
A19
Check PIP For Short To Power
A20
Check CKP Signal At ICM
A21
Check ICM Signal
A22
Check CKP Circuit Resistance
A23
Check CKP (+) Continuity (Resistance High)
A24
Check CKP (-) Continuity (Resistance High)
A25
Check CKP Air Gap & Trigger Wheel
A26
Check CKP (+) For Short To CKP (-)
A27
Check CKP (+) For Short To Ground
A28
Check CKP (+) For Short To Power
A29
Check CKP Resistance
PINPOINT TEST B - CODE 212: IDM FAILURE
Pinpoint Test B
B1
Check For IDM Signal At ICM
B2
Check For IDM Open
B3
Check IDM Output From ICM
B4
Check For IDM Short In PCM (PCM Disconnected)
B5
Check For IDM Short To Power In Harness
B6
Check For IDM Short To Ground
PINPOINT TEST C - CODE 213 OR LACK OF POWER OR
POOR FUEL ECONOMY
Pinpoint Test C
C1
Check Base Ignition Timing
C2
Check For Spark Angle Advance
C3
Check SPOUT At ICM
C4
Check SPOUT For Short In ICM
C5
Check SPOUT For Short To Power In Harness
C6
Check SPOUT For Short To Ground In Harness
C7
Check SPOUT Continuity To ICM
C8
Inspect CKP Sensor/Trigger Wheel
PINPOINT TEST D - CODE 215 OR 216
Pinpoint Test D
D1
Check For Spark
D2
Check Spark Plugs & Wires
D3
Check For Power At Coil
D4
Check C1 Voltage At Coil Pack
D5
Check C2 Voltage At Coil Pack
D6
Check C1 Voltage At ICM
D7
Check C2 Voltage At ICM
D8
Check C1 At Coil Connector
D9
Check C2 At Coil Connector
D10
Check C1 At Coil Connector While Cranking Engine
D11
Check C2 At Coil Connector While Cranking Engine
D12
Check C1 For Short To Ground
D14
Check C2 For Short To Ground (Coil Disconnected)
D15
Check C2 Circuit (Coil & ICM Disconnected)
D16
Check C1 For Short To Power
D17
Check C2 For Short To Power