Navigator 2WD V8-5.4L (2007)
a.
Yes, go to question 6.
b.
No, go to Diagnostic Service Procedure Step 1.
6.
Has the Stability Control Sensor Cluster been previously replaced?
a.
Yes, go to Diagnostic Service Procedure Step 6.
b.
No, go to question 7.
7.
Did the activation occur in less than 2 minutes after starting and driving the vehicle?
a.
Yes, go to Diagnostic Service Procedure Step 6.
b.
If no, go to Diagnostic Service Procedure Step 1.
DIAGNOSTIC SERVICE PROCEDURE
1.
Are after market accessories installed?
a.
Yes, repair sources of vibration (sub-woofer, modified center console). Proceed to Step 2.
b.
No, proceed to Step 2.
2.
Steering wheel angle (SWA) sensor inspection.
a.
Visually inspect the optical tone ring for contamination or debris.
(1)
Clean as necessary.
b.
Inspect the SWA connector for looseness. Reconnect as necessary.
(1)
Push, click, and pull to verify a good connection.
c.
Visually inspect around the area of the steering column/tone ring for signs of light entering the cabin, shining through the windshield
between the defroster grill and instrument panel (IP). Defroster grill variation may allow for slight gaps, enough to leak light.
(1)
Use IP colored foam to block any gaps (tape not recommended as it may loosen and fall off).
(2)
If no problems found with the SWA system, proceed to Step 3.
3.
Inspect mounting/torque of the bolts holding the stability control sensor cluster in position.
a.
Look for looseness of bolts or distortion of the sheet metal.
b.
Check the connector (pin push outs) and wiring (chafe) to the stability control sensor cluster.
c.
If no problems found with the stability control sensor cluster proceed to Step 4.
4.
Start engine and keep vehicle at a stand still. Monitor the YAW rate PID value for the Stability Control Sensor Cluster. Expected values: +/- 2.0
d/s YAW.
a.
If not within specification, replace the Stability Control Sensor Cluster per the Workshop Manual (WSM), Section 206-09: Vehicle
Dynamic Systems.
b.
If within specification, go to Step 5.
5.
Refer to Symptom Chart in the WSM, Section 206-09: Vehicle Dynamic Systems: Unintended ABS activation, ABS too sensitive, ABS activates
on a normal stop.
a.
If no problem found with the base brakes or wheel speed sensors, proceed to Step 6.
6.
If all steps above have no concern or are repaired and concern still exhibited, or you have been previously directed to this step, replace the ABS
module per the WSM, Section 206-09: Vehicle Dynamic Systems.
