AT 261 – AT 261 – Lab 12-13c - Ignition System Diagnosis and service

Name: ______

Date: ______

Distributor Inspection and Removal

Tools Needed;

Tool Board

TDC Whistle

1 - Engine Number 1 - Honda

Hand-Crank the engine until it is at TDC for #1 Cylinder.

Remove and inspect the distributor.

Inspect the distributor binding or loose bearings.

Inspect the distributor O-Ring.

Reinstall the distributor and show the instructor that it is still pointed at cylinder number 1.

Is this sensor a Hall Effect, Photo, or Magnetic Pulse type sensor? ______

Based on your findings is this distributor OK? ______

2 - Engine Number 2 - Ford

Hand-Crank the engine until it is at TDC for #1 Cylinder.

Remove and inspect the distributor.

Inspect the distributor binding or loose bearings.

Inspect the distributor O-Ring.

Reinstall the distributor and show the instructor that it is still pointed at cylinder number 1.

Is this sensor a Hall Effect, Photo, or Magnetic Pulse type sensor? ______

Based on your findings is this distributor OK? ______

What was different about this distributor than the Honda/Acura design? ______

Distributor Sensor Testing

Tools Needed;

DVOM

Brass Feeler Gauges.

3 - Coil Number 1 -

Specs - Air Gap - .014" - ______OK / NOT OK

What wire colors are the CYP (Cam Sensor) sensor? ______

CYP (Cam Sensor) Sensor Resistance - 150 - 180 Ohms - ______OK / NOT OK

Set the meter on A/C volts and rotate the rotor CYP (Cam Sensor). Does the meter show a A/C voltage reading that increases in speed as the rotor is turned? ______

Can this distributor indicate TDC? ______

Is this sensor a Hall Effect, Photo, or Magnetic Pulse type sensor? ______

Based on your findings is this distributor OK? ______

4 - Coil Number 2 -

Specs - Air Gap - .016" - ______OK / NOT OK

What wire colors are the TDC sensor? ______

What wire colors are the CYP (Cam Sensor) sensor? ______

TDC Sensor Resistance - 200 - 240 Ohms - ______OK / NOT OK

CYP (Cam Sensor) Sensor Resistance - .400K - .500 Ohms - ______OK / NOT OK

Set the meter on A/C volts and rotate the rotor CYP (Cam Sensor). Does the meter show a A/C voltage reading that increases in speed as the rotor is turned? ______

Set the meter on A/C volts and rotate the rotor (TDC SENSOR). Does the meter show a A/C voltage reading that increases in speed as the rotor is turned? ______

Is this sensor a Hall Effect, Photo, or Magnetic Pulse type sensor? ______

Based on your findings is this distributor OK? ______

No Start Diagnosis

Tools needed;

DVOM

Factory Shop Manual

2002 Honda Accord

Customer States - No Start.

Verify if there is a no-spark condition present.

Inspect and check your ignition coil - Ensure the vehicle is off, and the distributor is not electrically connected.

Primary Windings ______ohms

Secondary Windings ______ohms

Follow the procedures on page 4-22 for diagnosis. Also use the schematic on page 4-18.

What are the wire color(s) and for the ICM

______

______

______

______

What is the wire color(s) that power the coil ______

Should there be power at the coil when the key is on? ______

What three fuses can cause a no-start condition? ______

What are the wire color(s) that ground the coil ______

What are the wire color(s) for the CYP (Cam Sensor) ______

Where do they go? ______

If at Step 4, and there is no battery voltage, what other components could be at fault? ______

What did you find was the problem at Step 5 ______

Hint the ECM is located under the radio, the connectors can be accessed from the passenger side floor.

Conclusions ______

NATEF TASKS - VIII. ENGINE PERFORMANCE

C. Ignition System Diagnosis and Repair

1. Diagnose ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns on vehicles with electronic ignition (distributorless) systems; determine necessary action. P-1

2. Diagnose ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns on vehicles with distributor ignition (DI) systems; determine necessary action. P-1

3. Inspect and test ignition primary circuit wiring and solid state components; perform necessary action. P-2

4. Inspect, test and service distributor. P-3

5. Inspect and test ignition system secondary circuit wiring and components; perform necessary action. P-2

6. Inspect and test ignition coil(s); perform necessary action. P-1

7. Check and adjust ignition system timing and timing advance/retard (where applicable). P-3

8. Inspect and test ignition system pick-up sensor or triggering devices; perform necessary action. P-1

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