Pinpoint Test Q: The Powertrain Malfunction (Wrench) Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test Q: The Powertrain Malfunction (Wrench) Warning Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the powertrain malfunction data from the PCM and the transmission status from the Transmission Control Module (TCM) over the High Speed Controller Area Network (HS-CAN) communication bus. When a fault condition exists in the PCM, the PCM sends a request to the IPC (Instrument Panel Cluster) to illuminate the powertrain malfunction (wrench) warning indicator. When a fault occurs in the transmission, the TCM (Transmission Control Module) sends a request to the IPC (Instrument Panel Cluster) to illuminate the powertrain malfunction (wrench) warning indicator.

If the powertrain malfunction (wrench) warning indicator request message is missing from the PCM or TCM (Transmission Control Module) for 5 seconds or less, the powertrain malfunction (wrench) warning indicator remains in the last indication mode (on or off) based upon the last known good request received. If the powertrain malfunction (wrench) warning indicator request message is missing from the PCM for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0100:00 and defaults the powertrain malfunction (wrench) warning indicator on. If the powertrain malfunction (wrench) warning indicator request message is missing from the TCM (Transmission Control Module) for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0101:00 and defaults the powertrain malfunction (wrench) warning indicator on.

NOTE: If U0100:00 sets in the IPC (Instrument Panel Cluster) other symptoms may also be present such as an inoperative speedometer, tachometer or odometer.

This pinpoint test is intended to diagnose the following:

- ETC (Electronic Throttle Control) concern

- Transmission concern

- IPC (Instrument Panel Cluster)

PINPOINT TEST Q : THE POWERTRAIN MALFUNCTION (WRENCH) WARNING INDICATOR IS NEVER/ALWAYS ON

Q1 CARRY OUT THE IPC (Instrument Panel Cluster) POWERTRAIN MALFUNCTION (WRENCH) INDICATOR ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) powertrain malfunction (wrench) warning indicator (EMS_FAULT) active command. Command the powertrain malfunction (wrench) warning indicator on and off while observing the powertrain malfunction (wrench) warning indicator.

Does the powertrain malfunction (wrench) warning indicator illuminate when commanded on, and turn off when commanded off?

Yes
GO to Q2.

No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

Q2 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded IPC (Instrument Panel Cluster) DTCs from the self-test.

Is DTC U0100:00 or DTC U0101:00 recorded?

Yes
For DTC U0100:00, GO to Pinpoint Test AM Pinpoint Test AM: DTC U0100:00 and P1607:87.

For DTC U0101:00, GO to Pinpoint Test AN Pinpoint Test AN: DTC U0101:00.

No
GO to Q3.

Q3 RETRIEVE THE RECORDED DTCs FROM THE PCM KOEO (Key ON Engine OFF) SELF-TEST

- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.

Are any DTCs recorded?

Yes
REFER to Computers and Control Systems Information.

No
REFER to Automatically Shifted Manual Transmission/Transaxle to diagnose TCM (Transmission Control Module) DTCs.