TURBOCHARGER 4820236 - Caterpillar

Illustration 5 g01241517
Typical view of the diagnostic connector from the wire side
(A) Switched battery +
(B) Battery ground (GND)
(D) Data link +
(E) Data link -
Disconnect the wires from pin A and pin B of the diagnostic connector.
If the diagnostic connector is mounted on the engine, perform the following steps:
Disconnect the wires from P2:53 and P2:54.
Fabricate a jumper wire in order to connect pin A of the diagnostic connector to P2:53.
Fabricate a jumper wire in order to connect pin B of the diagnostic connector to P2:54.
If the diagnostic connector is mounted off the engine, perform the following step:
Fabricate a jumper wire in order to connect pin "A" of the diagnostic connector to battery+ and pin "B" to the battery-.
Connect the electronic service tool to the diagnostic connector that is on the engine harness or on the application.
Turn the keyswitch to the ON position. Expected Result:The power lamp should illuminate on the communications adapter. The power lamp on the communications adapter may illuminate when the keyswitch is in any position.Results:
The power lamp is illuminated - The fault is in the harness.Repair: Repair the faulty harness or replace the faulty harness.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOP
The power lamp is not illuminated. - Repair: Proceed to Test Step 6.Test Step 5. Check the Data Link Connections
Turn the keyswitch to the OFF position.
Disconnect the communications adapter from the diagnostic connector.
If the diagnostic connector is installed on the application, disconnect connector P1 from the ECM. Check the resistance between P1:8 and pin "D" on the diagnostic connector. If the diagnostic connector is installed on the engine, disconnect P2 from the ECM. Check the resistance between P2:28 and pin "D" on the diagnostic connector.
If the diagnostic connector is installed on the application, check the resistance between P1:9 and pin "E" on the diagnostic connector. If the diagnostic connector is installed on the engine, check the resistance between P2:20 and pin "E" on the diagnostic connector. Results:
The resistance is less than 10 Ohms - Proceed to Test Step 6.
The resistance is greater than 10 Ohms. - Repair: Perform the following repair:Repair the connectors and/or the harness, or replace the connectors and/or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are correctly connected.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOPTest Step 6. Change the Electronic Service Tool Components
If another electronic engine is available, connect the electronic service tool to the other engine. Ensure that the same cables are used.
Turn the keyswitch to the ON position. Determine if the electronic service tool operates correctly on the other engine.
If another engine is not available, obtain a replacement communications adapter and a replacement set of cables. Ensure that the set of cables for the electronic service tool are a complete set.
Install the replacement communications adapter and the set of cables for the electronic