Pinpoint Test A: The Pedestrian Alert System Is Inoperative
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
See Pedestrian Alert System description. REFER to: Pedestrian Alert System - System Operation and Component Description .
The PACM receives a hot at all times voltage from the BJB. The PACM receives the ignition status message for the RUN/START or ACC input from the BCM through the GWM over the HS-CAN3.
Possible Sources
- Fuse
- Communication concern
- PACM
- A1 PERFORM THE NETWORK TEST FOR ALL MODULES
- Using a diagnostic scan tool, perform a network test.
Do all equipped modules pass the network test?
Yes GO to A2 No - A2 PERFORM THE PACM (PEDESTRIAN ALERT CONTROL MODULE) MODULE SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the PACM module self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs) from the PACM module self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to DTC Chart: PACM. No GO to A3 - A3 CHECK THE SOUNDER OPERATION
- Install a known good sounder. REFER to: Pedestrian Alert System Speaker .
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NOTE: Make sure the vehicle is operating in electric mode (engine not running).
Operate the vehicle in a forward range between 0-30 km/h (0-8 mph) and verify whether the pedestrain alert system sounder operates.
Does the pedestrian alert system sounder operate?
Yes INSTALL a new sounder. REFER to: Pedestrian Alert System Speaker . No REINSTALL the original sounder. INSTALL a new PACM. REFER to: Pedestrian Alert Control Module (PACM) .