FSM says :
"Front Fog Lamps - The optional front fog lamps are requested when the left multi-function switch control knob is pulled outward to the front fog lamps detent position. The SCM reads the resistor multiplexed input from the left multi-function switch and sends an electronic
exterior lighting switch status message over the LIN data bus to the EMIC, which relays an electronic
exterior lighting switch request message over the CAN data bus to other electronic modules in the vehicle. The switch control knob incorporates an internal cam mechanism that will only allow the front fog lamps to be selected while the headlamp ON position is also selected, and will automatically move the control knob to the front fog lamps OFF position when the control knob is rotated to deselect the headlamps."
Also:
"FRONT FOG LAMPS
The front fog lamps have a path to ground at all times through their connection to the engine compartment wire harness. The engine compartment wire harness has takeouts with eyelet terminals that are secured by nuts to ground studs on the front end sheet metal within the engine compartment. The Steering Control Module (SCM) monitors a hard wired multiplex input from the left multi-function switch to determine whether the fog lamps are selected, then sends an electronic
front fog lamp switch status message to the EMIC over the Local Interface Network (LIN) data bus and the EMIC relays an electronic
front fog lamp request message to the TIPM over the CAN data bus.
When the TIPM receives a
front fog lamp request message it then controls front fog lamp operation by controlling a battery voltage output through high side drivers on right and left fog lamp feed circuits. The TIPM also sends the appropriate electronic message back to the EMIC to illuminate or extinguish the front fog lamp indicator. In certain markets where required, the TIPM will automatically de-energize the front fog lamps any time the headlamp high beams are selected.
The TIPM also provides a battery saver (load shedding) feature for the front fog lamps, which will turn these lamps OFF if they are left ON for more than about eight minutes with the ignition switch in the LOCK position or if there is a charging system failure."
Each front fog lamp shares a reflector with the headlamp and is adjusted in concert with the headlamp for the same side of the vehicle."
I think this means that the Fog Light option needs to be added to the TIPM/PCM configuration data to get OEM function. It alsot implies that there are no relays, a driver circuit in the TIPM provides power to the fogs and monitors for bulb failures.
It looks like the cable harness is different. You may have to bypass the switch and power the lights throught your own relay/swit
FSM says :
"Front Fog Lamps - The optional front fog lamps are requested when the left multi-function switch control knob is pulled outward to the front fog lamps detent position. The SCM reads the resistor multiplexed input from the left multi-function switch and sends an electronic exterior lighting switch status message over the LIN data bus to the EMIC, which relays an electronic exterior lighting switch request message over the CAN data bus to other electronic modules in the vehicle. The switch control knob incorporates an internal cam mechanism that will only allow the front fog lamps to be selected while the headlamp ON position is also selected, and will automatically move the control knob to the front fog lamps OFF position when the control knob is rotated to deselect the headlamps."
Also:
"FRONT FOG LAMPS
The front fog lamps have a path to ground at all times through their connection to the engine compartment wire harness. The engine compartment wire harness has takeouts with eyelet terminals that are secured by nuts to ground studs on the front end sheet metal within the engine compartment. The Steering Control Module (SCM) monitors a hard wired multiplex input from the left multi-function switch to determine whether the fog lamps are selected, then sends an electronic front fog lamp switch status message to the EMIC over the Local Interface Network (LIN) data bus and the EMIC relays an electronic front fog lamp request message to the TIPM over the CAN data bus.
When the TIPM receives a front fog lamp request message it then controls front fog lamp operation by controlling a battery voltage output through high side drivers on right and left fog lamp feed circuits. The TIPM also sends the appropriate electronic message back to the EMIC to illuminate or extinguish the front fog lamp indicator. In certain markets where required, the TIPM will automatically de-energize the front fog lamps any time the headlamp high beams are selected.
The TIPM also provides a battery saver (load shedding) feature for the front fog lamps, which will turn these lamps OFF if they are left ON for more than about eight minutes with the ignition switch in the LOCK position or if there is a charging system failure."
Each front fog lamp shares a reflector with the headlamp and is adjusted in concert with the headlamp for the same side of the vehicle."
I think this means that the Fog Light option needs to be added to the TIPM/PCM configuration data to get OEM function. It alsot implies that there are no relays, a driver circuit in the TIPM provides power to the fogs and monitors for bulb failures.
It looks like the cable harness is different. You may have to bypass the switch and power the lights throught your own relay/switch.
Thank you.
ch.
