Pinpoint Test B : The Pre-Collision Assist System Is Inoperative

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: The pre-collision assist system is offered as a camera-only option without ACC. Vehicles equipped without ACC uses object detection information from the forward-looking camera in the IPMA only. The HUD module is optional. Messages are displayed on the message center located in the IPC.

B1 PERFORM THE NETWORK TEST
- Using a diagnostic scan tool, perform the network test.
Do the CCM, IPMA and the HUD module pass the network test?

Yes GO to B2

No REFER to: Communications Network .

B2 CHECK THE IPMA (IMAGE PROCESSING MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, perform the IPMA self-test.

Are any IPMA Diagnostic Trouble Codes (DTCs) recorded?

Yes	DIAGNOSE all IPMA Diagnostic Trouble Codes (DTCs). If DTC C1A67:08 is recorded, GO to B6 For all other Diagnostic Trouble Codes (DTCs), REFER to: Lane Keeping System .

GO to B3

B3 CHECK THE CCM (CRUISE CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, perform the CCM self-test.

Are any CCM Diagnostic Trouble Codes (DTCs) recorded?

Yes	If DTC C1001:08 is present, GO to B6 If DTC C1132:4B is present, REFER to CCM DTC Chart . For all other CCM Diagnostic Trouble Codes (DTCs), REFER to: Cruise Control .

GO to B4

B4 CHECK THE HUD (HEAD UP DISPLAY) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, perform the HUD module self-test.
Are any HUD module Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to HUD DTC Chart .

No GO to B5

B5 CHECK THE MESSAGE CENTER FOR CORRECT OPERATION
- Check the IPC message center for correct operation.
Does the message center operate correctly?

Yes GO to B6

No REFER to: Instrumentation, Message Center and Warning Chimes .

B6 CHECK THE PRIVATE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect CCM C1897.

Disconnect IPMA C9224.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1897-2	Courtesy of FORD MOTOR COMPANY	Ground
C1897-3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit in question.

GO to B7

B7 CHECK THE PRIVATE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1897-2	Courtesy of FORD MOTOR COMPANY	Ground
C1897-3	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to B8

No	REPAIR the circuit in question.

B8 CHECK THE PRIVATE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1897-2	Courtesy of FORD MOTOR COMPANY	C1897-3

Is the resistance greater than 10, 000 ohms?

Yes

GO to B9

No	REPAIR the circuits.

B9 CHECK THE PRIVATE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1897-2	Courtesy of FORD MOTOR COMPANY	C9224-11
C1897-3	Courtesy of FORD MOTOR COMPANY	C9224-3

Are the resistances less than 3 ohms?

Yes

GO to B10

No	REPAIR the circuit in question.

B10 CHECK FOR CORRECT CCM (CRUISE CONTROL MODULE) OPERATION

Disconnect and inspect CCM connector and related in-line connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the CCM connector and related in-line connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, follow TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new CCM. REFER to: Cruise Control Module (CCM) . If the concern is still present, GO to B11

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

B11 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) OPERATION

Disconnect and inspect IPMA connector and related in-line connectors.

Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

Reconnect the IPMA connector and related in-line connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, follow TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new IPMA. REFER to: Image Processing Module A (IPMA) .

No	The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.