Pinpoint Test P : The IPMB (Image Processing Module B) Does Not Respond To The Diagnostic Scan Tool

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

Refer to MODULE COMMUNICATIONS NETWORK for schematic and connector information. Refer to Wiring PARKING AID for schematic and connector information.
Normal Operation and Fault Conditions

The IPMB communicates on the HS-CAN2.

Possible Sources
- Fuse
- Wiring, terminals and connector
- IPMB
Visual Inspection and Pre-checks
- Verify BJB fuse 25 (10A) is OK.

P1 CHECK THE IPMB (IMAGE PROCESSING MODULE B) VOLTAGE SUPPLY CIRCUITS FOR AN OPEN

Ignition OFF.

Disconnect: IPMB C3676B.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3676B-1	Courtesy of FORD MOTOR COMPANY	Ground
C3676B-14	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes

GO to P2

No	VERIFY BJB fuse 25 (10A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the OEM ELECTRICAL WIRING DIAGRAM INTRODUCTION to identify the possible causes of the circuit short.

P2 CHECK THE IPMB (IMAGE PROCESSING MODULE B) GROUND CIRCUITS FOR AN OPEN

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3676B-13	Courtesy of FORD MOTOR COMPANY	Ground
C3676B-26	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances less than 3 ohms?

Yes

GO to P3

No	REPAIR the circuit in question.

P3 CHECK THE HS-CAN2 (HIGH-SPEED CONTROLLER AREA NETWORK 2) CIRCUITS BETWEEN THE IPMB (IMAGE PROCESSING MODULE B) AND THE GWM (GATEWAY MODULE A) FOR AN OPEN

Disconnect: IPMB C3676A.

Disconnect GWM C2431.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3676A-18	Courtesy of FORD MOTOR COMPANY	C2431-18
C3676A-9	Courtesy of FORD MOTOR COMPANY	C2431-17

Are the resistances less than 3 ohms?

Yes

GO to P4

No	REPAIR the circuit in question.

P4 CHECK FOR CORRECT IPMB (IMAGE PROCESSING MODULE B) OPERATION

Ignition OFF.

Disconnect and inspect all the IPMB 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 IPMB 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 service articles: TSB, GSB, SSM or FSA If a service article exists for this concern, DISCONTINUE this test and FOLLOW service article instructions. If no service articles address this concern, INSTALL a new IPMB. REFER to: Image Processing Module B (IPMB) .

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.