8/9/2019 codigo de diagnostico 2121-7

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Shutdown SIS

Previous Screen

Product: TRACK-TYPE TRACTOR

Model: D8T TRACK-TYPE TRACTOR KPZ

Configuration: D8T TRACK-TYPE TRACTOR KPZ00001-UP (MACHINE) POWERED BY C15 Engine

TroubleshootingD8T, D9T, D10T and D11T Track-Type Tractors

Media Number -RENR8056-08 Publication Date -01/07/2011 Date Updated -19/07/2011

i03213972

MID 113 - CID 2121 - FMI 07

SMCS - 1435-038-FWD

Conditions Which Generate This Code:

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Illustration 1 g01640476

Schematic of the Forward Switch

This diagnostic code is recorded when status of the direction switch is wrong. When the switch is in

REVERSE, the Normally Open circuit is grounded and the Normally Closed circuit is open. When theswitch is in FORWARD or NEUTRAL, the Normally Open circuit is open and the Normally Closed

circuit is grounded. A diagnostic code is recorded when the status of the direction switch does notmatch the signal from the position sensor (direction selector). There will be no backup system for the

 position sensor (direction selector) if the sensor fails.

Test Step 1. CHECK THE DIRECTION SWITCH.

A. Check the screws that hold the direction switch to the console. Tighten any loose screws.

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B. If the problem persists, loosen the screws on the direction switch and rotate the switch slightly.

C. Tighten the screws. Change the direction of the machine and then determine if the diagnosticcode is still present.

D. If the problem still exists, loosen the screws on the direction switch. Rotate the switch in the

opposite direction slightly.

E. Tighten the screws. Change the direction of the machine and then determine if the diagnostic

code is still present.

F. Determine if the CID 2121 FMI 07 is present.

Expected Result:

The CID 2121 FMI 07 diagnostic code is present.

Results:

• OK - The CID 2121 FMI 07 diagnostic code is present.

Repair: The problem has not been corrected. The direction switch may have failed. Replace the

direction switch. Exit this procedure and perform the diagnostic code procedure again. If the problem persists, the ECM may have failed. Prior to replacing an ECM, always contact your

dealership for possible consultation with Caterpillar. This consultation may greatly reduce

repair time. See the Troubleshooting, "Electronic Control Module (ECM) - Replace".

STOP

• NOT OK - The CID 2121 FMI 07 diagnostic code is not present.

Repair: The problem does not exist at this time. The initial problem was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and

reconnected. Resume normal machine operation.

STOP

Copyright 1993 - 2014 Caterpillar Inc.

All Rights Reserved.

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Thu Dec 11 13:37:41 UTC-0430 2014

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