Circuit Description
The climate control panel (CCP) provides a switched ground to the circuit from the key cylinder halo light. The halo light is supplied voltage at all times. The CCP samples the voltage on the circuit from the halo light to determine the state of the input.
Conditions for Running the DTC
| • | The CCP is powered. |
| • | DTC B1327 is not current. |
Conditions for Setting the DTC
The DTC sets if the CCP senses no voltage on the circuit from the halo light for a period longer than 2 seconds.
Action Taken When the DTC Sets
The CCP disables the internal switch that controls the halo light.
Conditions for Clearing the DTC
The DTC will be cleared from the CCP when it receives a new power mode signal over the class 2 communications system. If the CCP senses no voltage on the halo light circuit the DTC will reset after 2 seconds.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Lighting System Diagnostic System Check | -- | ||
Does the ignition key cylinder lamp turn ON and OFF with each command? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | ||
3 |
Does the test lamp turn ON and OFF with each command? | -- | ||
4 | Test the ignition key cylinder lamp battery positive voltage circuit for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
5 | Test the ignition key cylinder lamp control circuit for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | ||
6 | Inspect for poor connections at the ignition key cylinder lamp bulb. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
7 | Inspect for poor connections at the climate control panel (CCP). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | ||
8 | Replace the ignition key cylinder lamp bulb. Refer to Ignition Lock Cylinder Bulb Replacement . Did you complete the replacement? | -- | -- | |
9 | Replace the CCP module. Refer to Control Assembly Replacement in HVAC Systems - Manual Did you complete the replacement? | -- | -- | |
10 | Operate the system in order to verify the repair. Did you find and correct the condition? | -- | System OK |
