Pinpoint Test V: The Powertrain Malfunction (Wrench) Warning Indicator Is Never/Always On
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test V: 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 over the High Speed Controller Area Network (HS-CAN) communication bus. The PCM monitors the Electronic Throttle Control (ETC) system status and transmission status. When a fault condition exists in the ETC system or in the transmission, the PCM provides the IPC with a message to turn the powertrain malfunction (wrench) indicator on.
If the ETC or transmission message is missing for less than 5 seconds, the IPC defaults the powertrain malfunction (wrench) indicator to the last on/off state, based upon the last known good ETC or transmission message received.
If the ETC or transmission message is missing for greater than 5 seconds, the IPC sets DTC U0100:00 and defaults the powertrain malfunction (wrench) warning indicator on. If the transmission message is missing for greater than 5 seconds, the IPC sets DTC U0100:87 and defaults the powertrain malfunction (wrench) indicator on.
If the AWD status message is missing for greater than 5 seconds, the IPC sets DTC U0102:00 and defaults the powertrain malfunction (wrench) warning indicator on.
NOTE: If U0100:87 is set in the IPC, other symptoms can also be present such as an inoperative speedometer, tachometer or temperature gauge.
This pinpoint test is intended to diagnose the following:
- ETC concern
- Transmission concern
- PCM
- IPC
PINPOINT TEST V: THE POWERTRAIN MALFUNCTION (WRENCH) WARNING INDICATOR IS NEVER/ALWAYS ON
-------------------------------------------------
V1 CHECK THE POWERTRAIN MALFUNCTION (WRENCH) OFF INDICATOR USING THE IPC DEALER TEST MODE
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC Dealer Test Mode.
- Scroll down to the tELtAL tESt (base IPC) or TELLTALE TEST (message center IPC) display.
- Monitor the powertrain malfunction (warning) indicator.
- Is the powertrain malfunction (warning) indicator illuminated?
Yes
GO to V2.
No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.
-------------------------------------------------
V2 RETRIEVE THE RECORDED PCM DTCs FROM THE KOEO SELF-TEST
- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
Yes
For DTC U0100:87, GO to Pinpoint Test AQ. Pinpoint Tests AQ: DTC U0100:87
For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes
No
GO to V3.
-------------------------------------------------
V3 RETRIEVE THE RECORDED PCM DTCs FROM THE KOEO SELF-TEST
- Check for recorded PCM DTCs from the Key ON Engine OFF (KOEO) self-test.
- Are any DTCs recorded?
Yes
DIAGNOSE all PCM DTCs first. REFER to Computers and Control Systems Information.
No
INSTALL a new PCM. REFER to Computers and Control Systems . TEST the system for normal operation.
-------------------------------------------------