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Pinpoint Test D

  1. Check For Spark During Cranking  Using a spark tester, check for spark at all spark plug wires with engine running. If spark is consistent on all spark plug wires, go to PINPOINT TEST E, step 1. If spark us not consistent, go to step 2.
  2. Check For Spark At Right Plug Wires During Cranking  If spark is present on all right side spark plug wires, go to step 3. If spark is not present on all right side spark plug wires, go to step 10.
  3. Left Spark Fault, Isolate Plugs & Wires  If spark was missing from both cylinder Nos. 1 and 4 or both cylinder Nos. 2 and 3, go top step 5. If not go to step 4.
  4. Check Left Side Spark Plugs & Wires  Check left spark plug wires for insulation damage, looseness, shorting or damage. Remove and check left spark plugs for damage, wear, carbon deposits and proper plug gap. If spark plugs and wires are okay, reinstall plugs and wires and go to step 5. If spark plugs or wires are defective, service or replace damaged component. Remove test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  5. Left Spark Fault, Check Module Output  With key off, install diagnostic cable. Connect diagnostic cable to breakout box. Use 2.3L overlay. Disconnect diagnostic cable connector from DIS module vehicle harness connector (pin Nos. 7-12). Connect a jumper wire between IGND S (J55) and BAT (J60). Connect a jumper wire between DPI (J54) and IGND S (J55). If spark was missing from cylinder Nos. 1 and 4, connect LED test light positive lead to VBAT D (J5) and negative lead to LC3D (J3). If spark was missing from cylinder Nos. 2 and 3, connect LED test light positive lead to VBAT D (J5) and negative lead to LC4D (J6). Crank engine and observe test light. If test light blinks continuously, go to step 6. If test light does not blink, replace DIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  6. Left Spark Fault, Check Left Coil Pack VBAT  Turn key off and remove jumper wires. Reconnect diagnostic cable connector to DIS module harness (pin Nos. 7-12). Connect LED test light positive lead to BAT L (J15) and negative lead to BAT (J60). Turn key on and observe test light. If test light is on, go to step 7. If test light is not on, locate and repair open circuit in left coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  7. Left Spark Fault, Isolate Left Coil Pack  Turn key off and disconnect HEGO sensor. Disconnect diagnostic cable from left coil pack. If spark was missing from cylinder Nos. 1 and 4 in step 3, connect LED test light positive lead to BAT+ (J57) and negative lead to LC3C (J30). If spark was missing from cylinder Nos. 2 and 3 in step 3, connect LED test light positive lead to BAT+ (J57) and negative lead to LC4C (J28). Crank engine and observe test light. If test light blink continuously. replace left coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If test light does not blink, go to step 8.
  8. Check For Open  Turn key off and disconnect diagnostic cable connector from DIS module (pin Nos. 7-12). Set DVOM to 20-ohm scale. If spark was missing from cylinder Nos. 1 and 4, measure resistance between LC3D (J3) and LC3C (J30). If spark was missing from cylinder Nos. 2 and 3, measure resistance between LC4D (J6) and LC4C (J28). If resistance is less than 5 ohms, go to step 9. If resistance is 5 ohms or more, locate and repair open circuit between left coil pack and DIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  9. Check For Shorts  If spark was missing from cylinder Nos. 1 and 4, measure resistance between LC3D (J3) and BAT (J57). If spark was missing from cylinder Nos. 2 and 3, measure resistance between LC4D (J6) and BAT (J57). If resistance is less than 10 k/ohms, locate and repair short VBAT between DIS module and coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If resistance is 10 k/ohms or more, locate and repair short to ground. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  10. Check Module Output  Turn key off and disconnect HEGO sensor. Install diagnostic cable and disconnect diagnostic cable from DIS module harness (pin Nos. 7-12). Connect diagnostic cable to breakout box and select 2.3L DIS overlay. Connect jumper wire between IGNDS (J55) and BAT (J60) at breakout box. If spark was missing from cylinder Nos. 1 and 4, connect LED test light positive lead to RC1D (J18) and negative lead to BAT+ (J57). If spark was missing from cylinder Nos. 2 and 3, connect LED test light positive lead to RC2D (J10) and negative lead to BAT+ (J57). Crank engine and observe test light. If test light blinks continuously, go to step 11. If test light does not blink, replace DIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  11. Isolate Right Coil Pack  Turn key off and disconnect diagnostic cable from right coil pack. If spark was missing from cylinder Nos. 1 and 4, connect LED test light positive lead to RC1C (J23) and negative lead to BAT+ (J57). If spark was missing from cylinder Nos. 2 and 3, connect LED test light positive lead to RC2C (J24) and negative lead to BAT+ (J57). Crank engine and observe test light. If test light blinks continuously, replace right coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If test light did not blink, go to step 12.
  12. Check For Open  Turn key off and disconnect diagnostic cable connector from DIS module (pin Nos. 7-12). Set DVOM to 20-ohm scale. If spark was missing from cylinder Nos. 1 and 4, measure resistance between RC1D (J18) and RC1C (J23). If spark was missing from cylinder Nos. 2 and 3, measure resistance between RC2D (J10) and RC1C (J23). If resistance is less than 5 ohms, go to step 13. If resistance is 5 ohms or more, locate and repair open circuit between right coil pack and DIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  13. Check For Shorts  Disconnect HEGO sensor. If spark was missing from cylinder Nos. 1 and 4, measure resistance between RC1D (J18) and BAT (J60). If spark was missing from cylinder Nos. 2 and 3, measure resistance between RC2D (J10) and BAT (J60). If resistance is less than 10 k/ohms, locate and repair short to ground between DIS module and coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If resistance is 10 k/ohms or more, locate and repair short to VBAT. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.


  1. Check For VBAT Open To Coil  With ignition off and ECA connected, install EDIS diagnostic cable to BOB, EDIS module, and coil pack. Do not connect VR sensor tee. Use EDIS "6" overlay (if available). Connect EDIS diagnostic cable negative lead to battery. Set EDIS diagnostic cable box switch to "4/6 cylinder" position. Set DVOM on 20-volt DC scale. With KOEO, measure voltage between VBATC (5) and BAT (7) at BOB. If DC voltage is 10.5 volts or more, go to step 2. If voltage is less than 10.5, repair open VBAT to EDIS module circuit. Remove test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  2. Verify Vehicle Operating Mode  If vehicle will crank and start, go to step 4. If vehicle will not crank and start, go to step 3.
  3. Check C1, C2, C3 In Sequence At Coil Pack During Cranking  With ignition off and ECA connected, set DVOM on 20-volt AC scale, crank engine and measure voltage between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If stabilized AC voltage reading is less than .2 volt, replace coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If voltage is .2 volt or more, go to step 5.
  4. Check C1, C2, C3 In Sequence At Coil Pack With Engine Running  With ignition off and ECA connected, set DVOM on 20-volt AC scale, crank engine and measure voltage between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If stabilized AC voltage reading is less than 1.0 volt, replace coil pack. Remove all test equipment, and reconnect all components. Clear Continuous Memory Codes, and rerun Quick Test. If voltage is 1.0 volt or more, go to step 5.
  5. Check C1, C2, C3 In Sequence At Coil Pack - KOEO Coil Fault  With ignition off and ECA disconnected, set DVOM on 20-volt DC scale. With KOEO, measure voltage between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If each DC voltage reading is 10.5 volts or more, go to step 6. If voltage is less than 10.5 volts, go to step 10.
  6. Check C1, C2, C3 In Sequence At EDIS Module - KOEO Coil Fault  With ignition off and ECA disconnected, set DVOM on 20-volt DC scale. With KOEO, measure voltage between BAT (7) and each coil C1E (53), C2E (55), C3E (54) at BOB. If each DC voltage reading is 10.5 volts or more, go to step 7. If voltage is less than 10.5 volts, repair open circuit. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  7. Check C1, C2, C3 In Sequence At Coil Pack - Isolate Coil  With ignition off and ECA disconnected, disconnect coil pack from coil tee. Leave EDIS diagnostic cable connected to vehicle harness connector. Set DVOM on 20-volt DC scale. With KOEO, measure voltage between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If each DC voltage reading is less than .5 volt, go to step 9. If voltage is .5 volt or more, go to step 8.
  8. Check C1, C2, C3 In Sequence At Coil Pack - Isolate EDIS Module  With ignition off and ECA disconnected, disconnect EDIS module from EDIS module tee. Leave EDIS diagnostic cable connected to vehicle harness connector. Set DVOM on 20-volt DC scale. With KOEO, measure voltage between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If each DC voltage reading is less than .5 volt, replace EDIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If voltage is .5 volt or more, repair short circuit. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  9. Check C1, C2, C3 Coil Primary  With ignition off and ECA disconnected, reconnect coil pack to coil tee. Set DVOM on 20-ohm scale. Measure resistance between VBATC (5) and each coil C1C (3), C2C (6), C3C (10) at BOB. If each resistance reading is .8 ohms or more, replace EDIS module. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test. If resistance reading less than .8 ohm, replace coil pack. Remove all test equipment and reconnect all components. Clear Continuous Memory Codes and rerun Quick Test.
  10. Check C1, C2, C3 Short To Ground In Coil Pack  With ignition off and ECA disconnected, set DVOM on 2-k/ohm scale. Measure resistance between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If each resistance reading is less than 1200 ohms, go to step 11. If resistance reading is 1200 ohms or more, replace coil pack. Remove all test equipment, and reconnect all components. Clear Continuous Memory Codes, and rerun Quick Test.
  11. Check C1, C2, C3 Short To Ground In Harness  With ignition off and ECA disconnected, disconnect EDIS coil tee from coil pack and vehicle harness connector. Disconnect EDIS module from EDIS module tee, leaving EDIS cable connected to vehicle harness connector. Set DVOM on 2-k/ohm scale. Measure resistance between BAT (7) and each coil C1C (3), C2C (6), C3C (10) at BOB. If any resistance reading is less than 5 ohms, repair short. Remove all test equipment, and reconnect all components. Clear Continuous Memory Codes, and rerun Quick Test. If any resistance reading is 5 ohms or more, replace EDIS module. Remove all test equipment, and reconnect all components. Clear Continuous Memory Codes, and rerun Quick Test.
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