Component Tests and General Diagnostics

Charging System Indicator Circuit Troubleshooting

Charging system indicator stays on, no DTCs set

NOTE: If the 12 V battery voltage is too low to operate the starter motor, the charging system indicator may come on.

1. Turn the ignition switch to ON (II).

2. Check the DC-DC CONVERTER TEMPERATURE in the DATA LIST with the HDS.

Is there 201-257 °F (94-125 °C) indicated?

YES -

The system is OK at this time. The charging system indicator will go off when the DC-DC converter temperature decreases. If the temperature does not decrease even though time has passed, replace the DC-DC converter Service and Repair.

NO -

Go to step 3.

3. Do the gauge self-diagnostic function.

Does the charging system indicator flash?

YES -

Go to step 4.

NO -

Substitute a known-good gauge control module, and recheck. If the charging system indicator circuit is OK, replace the original gauge control module.

4. Turn the ignition switch to LOCK (0).

5. Turn the battery module switch OFF.

6. Remove the IPU cover.

7. Remove the PCU lid, the PCU busplate, and the PCU cover.

8. Check the connections at the high voltage terminals (A, B) on the DC-DC converter (C).





Are the connections OK?

YES -

Replace the DC-DC converter Service and Repair.

NO -

Repair the connections.

Charging system indicator blinks, no DTCs set

9. This indicator may blink after you start the vehicle in extremely cold weather -22 °F (-30 °C) or blow. It stops blinking when the battery module warms up.

Charging system indicator never comes on, no DTCs set

10. Turn the ignition switch to LOCK (0).

11. Connect the HDS to the DLC.

12. Turn the ignition switch to ON (II), and select the IMA SYSTEM.

Does the HDS communicate with the IMA system?

YES -

Go to step 4.

NO -

Do the DLC circuit troubleshooting.

13. Do the gauge self-diagnostic function.

Does the charging system indicator flash?

YES -

The system is OK at this time.

NO -

Substitute a known-good gauge control module, and recheck. If the charging system indicator circuit is OK, replace the original gauge control module.