Test M: The Charging System Warning Indicator Is Never On

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

M1:

M1-M3:

M3-M5:

Normal Operation
The charging system warning indicator is controlled by the instrument cluster based upon data received from the generator through circuit 904 (LG/RD). The instrument cluster sets DTC B1317 if the battery voltage exceeds 16.5 volts DC ± 0.5 volts DC, when the ignition switch is in the START/RUN position. The instrument cluster sets DTC B1318 if battery voltage drops to less than 9 volts DC ± 0.5 volts DC, when the ignition switch is in the START/RUN position.

Possible Causes
- circuit 904 (LG/RD) open
- charging system
- PCM
- instrument cluster