Adaptive Cruise, Pre-Collision And Collision Avoidance System Functionality Diagnostics (25-7042)

ADAPTIVE CRUISE, PRE-COLLISION AND COLLISION AVOIDANCE SYSTEM FUNCTIONALITY DIAGNOSTICS

TECHNICAL SERVICE BULLETIN

SUMMARY

This article is intended to aid in the warrantability for vehicles with difficulty resolving IPMA  or CCM  alignment and/or functionality concerns.

SERVICE INFORMATION

Adaptive cruise control and pre-collision assist systems can use a forward windshield camera only IPMA  or a combination of IPMA  and a CCM.  Make sure which system is present on the vehicle so the system evaluation is completed properly.

The forward collision system warning indicator will be illuminated when the vehicle is in transport mode. Prior to any diagnosis, make sure the vehicle is not in transport mode. For further information on transport mode, refer to WSM,  Section 419-10.

Using the FDRS  tool, check the PID  for "ALGN_OFF-CCM". A value greater than +/-3 degrees indicates a mounting issue with the CCM  , not necessarily a defective module. Check for CCM,  or mounting surface damage and aftermarket components (shown below).

CCM ALIGNMENT INCORRECT

If issue remains after addressing outside factors, perform the CCM  alignment procedure. Refer WSM  , Section 419-03, Cruise Control Radar Alignment.

Notes regarding radar drive alignment: 

1. The radar needs to see 150-200 stationary targets on either side of the road to identify the center of the lane. An incorrect speedometer reading will inhibit the radar from detecting stationary targets.
2. These targets increment as the vehicle is driving over 20 mph (33 km/h).
3. The faster it sees these targets the faster it will complete the process.
4. Loss of communication and internal fault DTCs  will prevent completion of the process.
5. Key cycles between initiation of the drive alignment and the drive will move the vehicle out of alignment mode.

LOCATIONS OF IPMA/SENSOR AND CCM SENSOR

IPMA  (near rear view mirror) forward windshield camera (Figure 1)

CCM  (in the front grille, either visible or behind bumper) RADAR sensor (Figure 2)

EXAMPLES OF NON-WARRANTABLE AND WARRANTABLE CONDITIONS

IPMA  /CCM  functions can be affected by several factors that are not indicative of defect.

Typical non-warrantable causes of IPMA  /CCM  conditions

IPMA  :

• Aftermarket Windshield
• Environmental factors such as sun position, glare, moisture, frost, snow, ice, and dust/dirt
• Aftermarket tinting or windshield banners/stickers
• Aftermarket accessories such as but not limited to snowplow, winch, bug guard, etc.
• Windshield not installed correctly. Refer to date coding to determine factory or aftermarket installation

CCM  :

• Vehicle squatting from cargo weight
• Modifications that affect vehicle ride height, stance, or speedometer such as but not limited to lift kit, lowering kit, leveling kit and/or incorrect tire size
• CCM  mounting hardware bent or damaged or improper CCM  mounting
• Incorrect front license plate/bracket mounting
• Aftermarket or incorrect bumper or grille
• Brush guard installed
• Snowplow or snowplow mounting hardware installed
• Other aftermarket accessories installed on front of vehicle
• Facia damaged, facia installed incorrectly, or aftermarket facia installed

Typical warrantable conditions

• Glass distortion can distort the camera's view and prevent camera alignment and functionality. Refer to glass logo to determine factory glass.
• IPMA  mounting and/or bracket off-center, not clocked properly or not secured to windshield

Aftermarket Windshield Installation. Refer To Glass Logos, One Aftermarket Example (Figure 3), One Factory Example (Figure 4) (Non-Warrantable)

Environmental Factors Such As Sun Position, Glare, Moisture, Frost, Snow, Ice, And Dust/Dirt (Non-Warrantable) (Figure 5)

Aftermarket Tinting Or Windshield Banners/Stickers (Non-Warrantable) (Figure 6)

Aftermarket Accessories Such As But Not Limited To Snowplow, Winch, Bug Guard (Non-Factory), Etc. (Non-Warrantable) (Figures 7-9)

Windshield Not Installed Correctly. Refer To Glass Logo To Determine Factory Or Aftermarket Installation (Non-Warrantable) (Figure 10)

Vehicle Squatting From Cargo Weight (Non-Warrantable) (Figure 11)

Modifications That Effect Vehicle Ride Height, Stance, Or Speedometer Such As But Not Limited To Lift Kit, Lowering Kit, Leveling Kit And/Or Incorrect Tire Size (Non-Warrantable) (Figures 12-13)

CCM  Mounting Hardware Bent Or Damaged Or Improper CCM  Mounting (Non-Warrantable) (Figure 14)

Aftermarket Or Incorrect Bumper Or Grille (Non-Warrantable) (Figure 15)

Brush Guard Installed (Non-Warrantable) (Figure 16)

Facia Damaged, Facia Installed Incorrectly, Or Aftermarket Facia Installed (Non-Warrantable) (Figure 17)

Glass Distortion Can Distort The Camera's View And Prevent Camera Alignment And Functionality. Refer To The Glass Logo To Determine Factory Glass. (Warrantable) (Figure 18)

IPMA  Mounting And/Or Bracket Off-Center, Not Clocked Properly Or Not Secured To Windshield (Warrantable) (Figure 19)

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