CORE AS-HYDRAULIC OIL COOLER 2746523 - Caterpillar

Illustration 1 g02388518
(1) 373-4609 Spark Tester
Illustration 2 g02309455
Table 4
Troubleshooting Test Steps Values Results
3. Check for Spark at the Coil Output, Using the Spark Indicator
A. Assemble the 373-4609 Spark Tester as shown in Illustration 1.
Ensure that the alligator clip is secured to a good ground source.
B. Install the spark indicator as shown in illustration 2.
C. Use the "Aftertreatment #1 Ignition Transformer Primary Override" on Cat ET to turn ON the ARD ignition system. Check for spark in the spark indicator.
Spark
Result: Spark is present in the indicator.
Proceed to Test Step 4.
Result: Spark is not present in the indicator.
Repair: Replace the ignition coil. Inspect the connector terminals. If terminal damage/erosion is found, repair the ground from the coil housing to the chassis. Also, inspect the ground wire from the coil to the ARD head.
Proceed to Test Step 8.
Illustration 3 g02478839
Table 5
Troubleshooting Test Steps Values Results
4. Check for Spark to the Spark Plug
A. Assemble the 373-4609 Spark Tester as shown in Illustration 3.
B. Install the spark plug indicator between the spark plug and the end of the spark plug wire.
C. Use the "Aftertreatment #1 Ignition Transformer Primary Override" on Cat ET to turn ON the ARD ignition system. Check for spark in the spark indicator.
Spark
Result: Spark is present in the indicator.
Repair: Replace the spark plug.
Proceed to Test Step 8.
Result: Spark is not present in the indicator.
Repair: Replace the ignition wire.
Proceed to Test Step 8.
Illustration 4 g01395281
Information for the ignition circuit.
Table 6
Troubleshooting Test Steps Values Results
5. Replace the Ignition Wire
A. Replace the ignition wire between the ignition coil and the ARD combustion head.
B. Use the "Aftertreatment #1 Ignition Transformer Primary Override" on Cat ET to turn on the ARD ignition system.
Ignition Wire
Result: The ignition wire was replaced and the 3484–5 or 2465–5 is no longer active.
Proceed to Test Step 8.
Result: The ignition wire was replaced and the 3484–5 or 2465–5 remains active.
Proceed to Test Step 6.
6. Check for Voltage at the Ignition Coil
A. Disconnect the connector from the ignition coil.
Not all connectors may be shown in the illustration above, refer to the electrical schematic.
B. Turn the keyswitch to the "ON" position.
C. Establish communication between Cat ET and the ECM