1. Disconnect the negative battery cable..
2. Disconnect the connector..
3. Verify the resistance between bass-box terminals.

If not within the specification, replace the bass-box.

0.9—1.1 ohms
Auxiliary Jack/Usb Port Removal/Installation
Bass Box Removal/InstallationEngine Tune Up [Mzr 2.0, Mzr 2.5]
NOTE:
If the accelerator pedal is depressed continuously for a specified time,
the engine speed may decrease to the idle speed. This is due to the fuel cut
control operation, which prevents overheating, and it does not indicate a malfunction.
Engine Tune-up Preparation
1. Verify ...
TCM Inspection [FS5 A EL]
NOTE:
The TCM terminal voltage can vary with conditions when measuring and changes
due to age deterioration on the vehicle, causing false diagnosis. Therefore
a comprehensive inspection of the input and output systems, and the TCM is necessary
to determine where the malfunction occu ...
Headlight Leveling Switch Inspection
1. Disconnect the negative battery cable..
2. Remove the headlight leveling switch..
3. Verify that the resistance and continuity between the headlight leveling switch
terminals is as indicated in the table.
If not as indicated in the table, or if the resistance is not within the
...