THEORY OF OPERATION
The Shift Lever Assembly (SLA) controller (Electronic Shift Module - ESM) monitors ignition voltage. The DTC will set if the monitored battery voltage drops below 6.0 volts and a temporary limp in will be activated. If the voltage rises above 9.0 volts, normal operations is resumed.
The Shift Lever Assembly monitors ignition voltage. The DTC will set, if the monitored battery voltage rises above 16.0 volts.
The Shift Lever Assembly (SLA) Electronic Shift Module (ESM) performs various internal tests to verify proper controller operation. This DTC indicates that there is an issue with the Shifter's internal processor.
The brake switch signal must be active before the shift lever can be moved out of the park position. The Shifter Lever Assembly (SLA) Electronic Shift Module (ESM) receives two brake switch signals. The first signal is a CAN C Bus message sent to the shifter lever assembly. The second signal is a hard wired brake switch signal to the shifter lever assembly from the WIN. The CAN C Bus message is the primary brake switch signal and the hard wired signal serves as the backup brake switch signal. These two brake switch signals are compared against each other to verify proper brake switch operation.
The brake switch signal must be active before the shift lever can be moved out of the park position. The Shifter Lever Assembly (SLA) Electronic Shift Module (ESM) receives two brake switch signals. The first signal is a CAN C Bus message sent to the shifter lever assembly. The second signal is a hard wired brake switch signal to the shifter lever assembly from the WIN. The CAN C Bus message is the primary brake switch signal and the hard wired signal serves as the backup brake switch signal. These two brake switch signals are compared against each other to verify proper brake switch operation.
The AutoStick® Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick® selection is then sent over the CAN C bus to the TCM to engage the requested gear.
The AutoStick® Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick® selection is then sent over the CAN C bus from the Electronic Shift Module (ESM) to the TCM to engage the requested gear.
Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module (ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to communicate the MIL status to the Engine Controller.
For CAN BUS diagnostic procedures. Refer to DIAGNOSIS AND TESTING.
Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module (ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to communicate the MIL status to the Engine Controller.
Refer to DIAGNOSIS AND TESTING and perform the U0100-Lost Communication with ECM/PCM diagnostic procedure.
Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module (ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to communicate the MIL status to the Engine Controller.
Refer to DIAGNOSIS AND TESTING and perform the U0121-Lost Communication with Anti-Lock Brake Module diagnostic procedure.
Some controllers communicate with other controllers over the CAN C BUS. The Electronic Shift Module (ESM) continuously monitors BUS activity and reads the messages it needs. The CAN C BUS is also used to communicate the MIL status to the Engine Controller.
Refer to DIAGNOSIS AND TESTING and perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure.