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Ignition System Check: Troubleshooting

TROUBLESHOOTING CHART

Step Action Value(s) Yes No
1
  1. Remove the spark plugs.
  2. Inspect for wet spark plugs, cracks, wear, improper gap, burned electrodes, or heavy deposits.
  3. Replace the spark plugs as needed.

Is the repair complete?		 - System OK Go to Step 2
2 Check for the presence of spark from all of the ignition wires while cranking the engine.
Is spark present from all of the ignition wires?		 - System OK Go to Step 3
3
  1. Measure the resistance of the ignition wires.
  2. Replace any ignition wire(s) with a resistance above the value specified.
  3. Check for the presence of spark from all of the ignition wires.

Is spark present from all of the ignition wires?		 30,000 Ω System OK Go to Step 4
4 Is spark present from at least one of the ignition wires, but not all of the ignition wires? - Go to Step 5 Go to Step 12
5
  1. Turn the ignition OFF.
  2. Disconnect the Electronic Ignition (EI) system ignition coil connector.
  3. While cranking the engine, measure the voltage at the EI system ignition coil connector terminal 1.

Does the voltage fluctuate within the values specified?		 0.2 - 2.0 V Go to Step 8 Go to Step 6
6 Check for an open in the wire from EI system ignition coil connector terminal 3 to the Engine Control Module (ECM) connector terminal E3/E19.
Is the problem found?		 - Go to Step 7 Go to Step 11
7
  1. Repair the wiring as needed.
  2. Connect the EI system ignition coil connector.
  3. Check for the presence of spark from all of the ignition wires.

Is spark present from all of the ignition wires?		 - System OK -
8 While cranking the engine, measure the voltage at the EI system ignition coil connector terminal 1.
Does the voltage fluctuate within the values specified?		 0.2 - 2.0 V Go to Step 10 Go to Step 9
9 Check for an open in the wire from EI system ignition coil connector terminal 1 to the ECM connector terminal E4/E20.
Is the problem found?		 - Go to Step 7 Go to Step 11
10
  1. Replace the EI system ignition coil.
  2. Connect the EI system ignition coil connector.
  3. Check for the presence of spark from all of the ignition wires.

Is spark present from all of the ignition wires?		 - System OK -
11
  1. Replace the ECM.
  2. Connect the EI system ignition coil connector.
  3. Check for the presence of spark from all of the ignition wires.

Is spark present from all of the ignition wires?		 - System OK -
12
  1. Turn the ignition OFF.
  2. Disconnect the Crankshaft Position (CKP) sensor connector.
  3. Measure the resistance between the CKP sensor terminals 1 and 2.

Is the resistance within the value specified?		 400 - 600 Ω Go to Step 13 Go to Step 14
13 Measure the resistance between following terminals.
  • Terminals 1 and 3 of CKP sensor
  • Terminals 2 and 3 of CKP sensor

Is the resistance within the value specified?		 400 - 600 Ω Go to Step 15 Go to Step 14
14 Replace the crankshaft position sensor.
Is the repair complete?		 - System OK -
15
  1. Turn the ignition ON.
  2. Measure the voltage between the CKP sensor connector terminals 1 and 3.

Is the voltage within the value specified?		 1.3 - 1.5 V Go to Step 21 Go to Step 16
16 Measure the voltage between the CKP sensor connector terminal 1 and ground.
Is the voltage within the value specified?		 1.3 - 1.5 V Go to Step 19 Go to Step 17
17 Check the wire between the CKP sensor connector terminal 1 and the ECM connector terminal E36 for an open or short.
Is the problem found?		 - Go to Step 18 Go to Step 10
18 Repair the wire between the CKP sensor connector terminal 1 and the ECM connector terminal E36.
Is the repair complete?		 - System OK -
19 Check the wire between the CKP sensor connector terminal 3 and ground for an open or short.
Is the problem found?		 - Go to Step 20 Go to Step 11
20 Repair the wire between the CKP sensor connector terminal 3 and ground.
Is the repair complete?		 - System OK -
21
  1. Turn the ignition ON.
  2. Measure the voltage between the CKP sensor connector terminals 2 and 3.

Is the voltage within the value specified?		 1.3 - 1.5 V Go to Step 25 Go to Step 22
22 Measure the voltage between the CKP sensor connector terminal 2 and ground.
Is the voltage within the value specified?		 1.3 - 1.5 V Go to Step 19 Go to Step 23
23 Check the wire between the CKP sensor connector terminal 2 and the ECM connector terminal E37 for an open or short.
Is the problem found?		 - Go to Step 24 Go to Step 11
24 Repair the wire between the CKP sensor connector terminal 2 and the ECM connector terminal E37.
Is the repair complete?		 - System OK -
25
  1. Turn the ignition OFF.
  2. Connect a test light between the EI system ignition coil connector terminal 2 and ground.
  3. Turn the ignition ON.

Is the test light ON?		 - Go to Step 28 Go to Step 26
26 Check for an open in the wiring between the EI system ignition coil connector, terminal 2 and the B (±).
Is the problem found?		 - Go to Step 27 -
27 Repair the open in the wiring between the EI system ignition coil connector terminal 2 and the battery positive.
Is the repair complete?		 - System OK -
28 Check for a damage in the terminal of the EI system ignition coil connector and repair as needed.
Is the repair complete?		 - System OK -
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