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Tilt Sensor Test Screen

CASIO G-SHOCK TILT SENSOR DIAGNOSTIC MODE
All Casio models with the auto-illumination feature use a basic tilt sensor to determine the position of the watch face. If you’re having problems with your Auto-EL, you may have a faulty tilt sensor. Luckily, Casio engineers have built in a tilt-sensor diagnostic mode that you can use to diagnose potential problems.
To access the tilt-sensor diagnostic screen:
- In timekeeping mode, press buttons (A), (B) and © simultaneously
- The screen will display TLT
- The display will show ‘8888’ when the sensor is activated
- Press any button to return to normal
Solar Panel Test

CASIO G-SHOCK SOLAR SENSOR DIAGNOSTIC MODE
G-Shock models with the “tough solar” designation use special batteries and an array of small solar panels to stay charged. If you’re having problems charging your watch even when it’s exposed to direct sunlight, you may have damaged your solar panels. To test if your solar panels are functional, you can use the built in solar diagnostic mode.
To access the solar diagnostic screen:
- In timekeeping mode, press buttons (A), (B) and (D) simultaneously
- The screen will display SLR
- The display will show ‘8888’ when the solar cell is receiving light
- Press any button to return to normal
If the battery is completely charged, the solar panels may not accept additional sunlight.
Solar Panel Test

CASIO G-SHOCK SOLAR SENSOR DIAGNOSTIC MODE
G-Shock models with the “tough solar” designation use special batteries and an array of small solar panels to stay charged. If you’re having problems charging your watch even when it’s exposed to direct sunlight, you may have damaged your solar panels. To test if your solar panels are functional, you can use the built in solar diagnostic mode.
To access the solar diagnostic screen:
- In timekeeping mode, press buttons (A), (B) and (D) simultaneously
- The screen will display SLR
- The display will show ‘8888’ when the solar cell is receiving light
- Press any button to return to normal
If the battery is completely charged, the solar panels may not accept additional sunlight.
Power Saving Mode

CASIO G-SHOCK POWER SAVING MODE
Another great feature buried in the Casio G-Shock manual is the ability to automatically conserve power when not in use. The power-saving feature will automatically turn off the display after 60-70 minutes of inactivity. In this sleep mode, all other functions of the watch (including alarm and radio sync) remain active. After 6 or 7 days of inactivity, the watch will go into “deep sleep” mode which turns off auto-receive, beeps and tones, illumination, and display.
To turn on power saving mode:
- In time-keeping mode, hold down button (A) until the city code starts to flash
- Press © nine times until power settings screen appears (will display PS)
- Press (D) to toggle on or off
- Press (A) again to set and exit
Auto-Illuminator

G-SHOCK AUTO ILLUMINATOR MODE ACTIVATED
This is probably one of the better-known hidden features of the Casio G-Shock, but still one that many people don’t realize exists. Most G-Shocks with the backlight illumination feature actually have an “auto-illumination” mode, a nifty feature that automatically illuminates the watch when it is tilted towards your face 15 degrees. Although this feature is known to drain your battery faster, it’s smart enough to disable itself if the watch falls below full charge. Additionally, the feature will only remain active for six hours before needing to be re-activated manually.
To turn on auto-illumination:
- Hold down button (B) for 3 seconds
- The wording “A. El” will appear on the dial if successful
- Hold down button (B) for 3 seconds to manually disable, otherwise it will self-disable after 6 hours.