Steering Wheel and Column Electrical Components - System Operation and Component Description
System Operation
System Diagram - Push Button Ignition Switch
Network Message Chart - Push Button Ignition Switch
GWM Module Network Input Messages
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
Ignition status | BCM | This message informs the GWM of the current ignition status; off, run, start, unknown or invalid. |
PCM Module Network Input Messages
Broadcast Message | Originating Module | Message Purpose |
|---|---|---|
Ignition status | BCM | This message informs the PCM of the current ignition status; off, run, start, unknown or invalid. |
Push Button Ignition Switch
The push button ignition switch is used to control the ignition mode.
There are 2 circuits the BCM monitors from the ignition switch to change the ignition mode. One circuit is monitored for voltage and the other for a ground signal. When the START/STOP button is pressed, one circuit routes battery voltage to the BCM while a voltage signal from the BCM on the second circuit is routed to ground, indicating a request to change the ignition state. Changing the ignition state from the OFF mode works in conjunction with the PATS. The BCM must recognize a valid programmed key before it changes the ignition mode out of OFF. Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01B Passive
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