C0161

DTC C0161








Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
- 100 ignition cycles pass with no DTCs detected.

Diagnostic Aids
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.

- Thoroughly inspect any circuitry that may be causing the complaint for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal-to-wiring connections
- Physical damage to the wiring harness

- Possible causes of this DTC are the following conditions:
- A signal circuit of the stop lamp switch is open
- The stop lamp switch is misadjusted
- Verify proper stop lamp switch operation using the data list of the scan tool. As the brake is applied, the data list displays the stop lamp switch ON within 2.54 cm (1 in) of travel
- All brake lamps are open
- All brake lamp ground are open
- Circuit has a wiring problem, terminal corrosion, or poor connections.
- Loose or corrosion, or poor connections

- If an intermittent malfunction exists refer to Testing for Intermittent and Poor Connections.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This DTC detects an open stoplamp switch signal circuit from the stoplamp side of the splice pack to the EBCM.
4. The EBCM sources 5 volts on the stoplamp switch signal circuit. This small voltage has a ground path through the stoplamp bulbs. This DTC sets if the path to ground is open.