Diagnostic Routine T

Diagnostic Routine T

Diagnostic Overview

The Malfunction Indicator Lamp (MIL) Is Never or Always On

Normal Operation and Fault Conditions

NOTE: If DTC (Diagnostic Trouble Code) U0100:00 sets in the IPC (Instrument Panel Cluster), other observable symptoms can be an inoperative speedometer, tachometer or odometer.

REFER to Malfunction Indicator Lamp (MIL) .

If the engine MIL (Malfunction Indicator Lamp) request message is missing or invalid for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the MIL (Malfunction Indicator Lamp) to its last state (on or off) based upon the last known good message received.

If the engine MIL (Malfunction Indicator Lamp) request message is missing for 5 seconds or longer, the BCM (Body Control Module) and the IPC (Instrument Panel Cluster) set DTC (Diagnostic Trouble Code) U0100:00. If the engine MIL (Malfunction Indicator Lamp) request message is missing, the IPC (Instrument Panel Cluster) defaults the MIL (Malfunction Indicator Lamp) on.

Pinpoint Test

1. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform the IPC (Instrument Panel Cluster) self-test.

Are any DTC (Diagnostic Trouble Code) recorded?







2. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) SELF-TEST

1. Using a scan tool, perform the PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

Are any PCM (Powertrain Control Module) DTCs (Diagnostic Trouble Codes) recorded?







3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE BCM (Body Control Module) SELF-TEST

1. Using a scan tool, perform the BCM (Body Control Module) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?







4. CHECK THE MIL (Malfunction Indicator Lamp) USING THE DEALER TEST MODE

1. Ignition OFF.

2. Enter the Dealer Test Mode. REFER to Dealer Test Mode .

3. Scroll to LED test.

4. Monitor the MIL (Malfunction Indicator Lamp) indicator.

Does the MIL (Malfunction Indicator Lamp) illuminate?