Test T

PINPOINT TEST T: THE CHARGING SYSTEM WARNING INDICATOR IS NEVER ON

Test T1-T2:

Normal Operation
The charging system warning indicator is controlled by the instrument cluster based upon data received from the PCM over the CAN, using circuits 3125 (RD/YE) and 3126 (TN/YE). The instrument cluster will set DTC B1317 if the battery voltage, when in the START/RUN position, exceeds 16.5 volts DC ± 0.5 volts DC. The instrument cluster will set DTC B1318 if battery voltage, when in the START/RUN position, drops below 9 volts DC ± 0.5 volts DC.

Possible Causes
- charging system
- PCM
- instrument cluster