Pinpoint Test AI: The Powertrain Malfunction (Wrench) Message Center Warning Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Test AI: The Powertrain Malfunction (Wrench) Message Center Warning Indicator Is Never/Always On
Normal Operation
The Instrument Panel Cluster (IPC) receives the wrench message center warning indicator data from the PCM for the Electronic Throttle Control (ETC) status and the Transmission Control Module (TCM) (part of the PCM) for the transmission status over the High Speed Controller Area Network (HS-CAN) communication bus. When a fault condition exists in the ETC (Electronic Throttle Control) system or the transmission, the PCM provides the IPC (Instrument Panel Cluster) with a message to turn on the powertrain malfunction (wrench) message center warning indicator.
If the ETC (Electronic Throttle Control) or transmission data is missing for less than 5 seconds from the PCM or TCM (Transmission Control Module), the IPC (Instrument Panel Cluster) defaults the powertrain malfunction (wrench) message center warning indicator to the last on/off state, based upon the last known good message received.
If the ETC (Electronic Throttle Control) message is missing or invalid for greater than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0100:00 and defaults the powertrain malfunction (wrench) message center warning indicator ON.
If the transmission status message is missing or invalid for greater than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0101:00 and defaults the powertrain malfunction (wrench) message center warning indicator ON.
NOTE: If U0100:00 is set in the IPC (Instrument Panel Cluster) other symptoms may also be present such as an inoperative speedometer, tachometer or temperature gauge.
This pinpoint test is intended to diagnose the following:
- ETC (Electronic Throttle Control) concern
- Transmission concern
- IPC (Instrument Panel Cluster)
PINPOINT TEST AI : THE POWERTRAIN MALFUNCTION (WRENCH) MESSAGE CENTER WARNING INDICATOR IS NEVER/ALWAYS ON
AI1 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 AU. Pinpoint Test AU: DTC U0100:00
For DTC U0101:00, GO to Pinpoint Test AV. Pinpoint Test AV: DTC U0101:00
No
GO to AI2.
AI2 VERIFY THE OPERATION OF THE ENGINE OVER-TEMPERATURE MESSAGE CENTER INDICATOR
- Ignition OFF.
- Disconnect: In-Line C219.
- Ignition ON.
- NOTE: If multiple warnings are present, the message center indicators rotate through each of the warnings. Allow the displays to rotate through each display while determining whether the powertrain malfunction (wrench) and over-temperature message center indicators are active.
Observe the message center or integrated display area of the IPC (Instrument Panel Cluster) with the PCM connected and disconnected.
Does the engine over-temperature message center warning indicator remain off when the PCM is connected and become active with the PCM disconnected?
Yes
GO to AI3.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.
AI3 RETRIEVE THE RECORDED DTCs FROM THE PCM AND TCM (Transmission Control Module) KOEO (Key ON Engine OFF) SELF-TEST
- Check for recorded PCM and TCM (Transmission Control Module) DTCs from the Key ON Engine OFF (KOEO) self-test.
Are any ETC (Electronic Throttle Control) DTCs recorded?
Yes
REFER to Computers and Control Systems Information.
No
For transmission DTCs, REFER to Automatic Transmission/Transaxle &/or Transmission Control Systems.