Circuit Description
This DTC is the second portion of DTC C1291. If DTC C1291 occurred
during an ignition cycle, DTC C1293 becomes a current malfunction during the
next ignition cycle, keeping TCS disabled until a brake switch on state
is seen. When a change is seen during an ignition cycle in which DTC C1293
is a current malfunction, DTC C1291 will clear itself at the end of the
current ignition cycle, and TCS will enable itself at the start of the next
ignition cycle. DTC C1293 alone indicates DTC C1291 occurred previously,
but is intermittent, or has been corrected.
Conditions for Setting the DTC
DTC C1293 is set when DTC C1291 was set in the previous or current ignition
cycle.
Action Taken When the DTC Sets
| • | A malfunction DTC is stored. |
| • | Traction Control indicator is turned on. |
| • | ABS remains functional. |
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC
function is used. |
| • | 100 ignition cycles have passed with no DTCs detected. |
Diagnostic Aids
| - | Stoplamp switch fuse open. |
| - | Stoplamp switch contacts open. |
| - | Stoplamp switch misadjusted. |
| - | Stoplamp switch fuse power feed circuit open. |
| • | It is very important that a thorough inspection of the wiring
and connectors be performed. Failure to carefully and fully inspect wiring
and connectors may result in misdiagnosis, causing part replacement with
reappearance of the malfunction. |
| • | An intermittent malfunction is most likely caused by a poor connection,
rubbed through wire insulation, or a wire that is broken inside the insulation. |
| • | Also, verify proper stoplamp switch operation using the Data List
of the scan tool. As the brake is applied, the data list should display the
stoplamp switch on within 1 inch of travel. |
