I039

I039 SSS SIGNAL FAULT

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The Speed-Sensitive Suspension (SSS) controller communicates with the IPC over CKT 370. Code I039 will set if CKT 370 (II12) is HI when vehicle speed is less than 5 mph, or if CKT 370 (II12) is LOW when vehicle speed is greater than 15 mph.

NOTICE: Code I039 will set during normal Computer Command Ride (CCR) diagnostic mode. If CCR diagnosis has been recently performed, clear code I039, test drive vehicle, and recheck for codes.

Possible causes of this code are:

^ CCR fault detected by the CCR control module

^ CCR diagnostic mode entered

^ Loss of IPC vehicle speed information

^ Open or short on CKT 370, CKT 818, or CKT 817

^ Faulty CCR control module

During the time the failure is present, the DIC will display "SERVICE RIDE CONTROL".

TEST DESCRIPTION

Test numbers refer to circled numbers on the diagnostic chart.

1. If E024 is stored, a vehicle speed sensor problem may be the source of this code.

2. If the speedometer does not function, an open or short on CKT 818 may be the fault. See inoperative speedometer diagnosis. Speedometer Inoperative or Inaccurate

3. The problem is not with the vehicle speed sensor or the IPC. SUSPENSION will diagnose the CCR system.


NOTES ON INTERMITTENTS

Intermittent code setting may be caused by wiring problems or speed related conditions. It may be helpful to retrieve snapshot data for I039 and record parameters ID60 (vehicle speed) and II12 (CCR input) to determine conditions at the time of the CCR fault.