Component Tests and General Diagnostics

2UR-FSE CHARGING: CHARGING SYSTEM: ON-VEHICLE INSPECTION

1. CHECK AUXILIARY BATTERY

(a) Check that the auxiliary battery cables are connected to the correct terminals.

HINT
If they are not, connect them properly.

(b) Check the auxiliary battery for damage and deformation. If severe damage, deformation or leakage is found, replace the auxiliary battery.

2. CHECK AUXILIARY BATTERY VOLTAGE

(a) Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.

(b) Measure the auxiliary battery voltage according to the value(s) in the table below.

Result:





3. RECHARGE AUXILIARY BATTERY

(a) Recharge the auxiliary battery.

HINT
* Recharge the auxiliary battery according to the charger's instructions.
* Apply the appropriate charging current according to the type of auxiliary battery as shown in the table below.






(b) Turn the power switch off and turn on the high beam headlights for 30 seconds. This will remove the surface charge from the auxiliary battery.

(c) Measure the auxiliary battery voltage according to the value(s) in the table below.

Result:





4. CHECK AUXILIARY BATTERY TERMINAL, FUSIBLE LINK AND FUSE

(a) Check that the auxiliary battery terminals are not loose or corroded.

HINT
If the terminals are corroded, clean them.

(b) Measure the resistance of each fusible link and fuse for the auxiliary battery charging system.

Standard resistance:

Below 1 Ohms

HINT
If any of the results is not as specified, replace the fusible link or fuse as necessary.

5. CHECK AMD TERMINAL

CAUTION:
Be sure to wear insulated gloves.

(a) Check that the service plug grip is not installed.

NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

(b) Check that the AMD terminal is connected securely and that there are no contact problems.

HINT
If there are any arc marks, replace the affected parts.

(c) Check that the nuts for the AMD terminal are tightened to the specified torque.

HINT
If there are no arc marks and the AMD terminal connection is faulty, connect the AMD terminal securely.

(d) Install the service plug grip.

6. CHECK DC/DC CONVERTER FUNCTION

(a) Connect an AC/DC 400 A probe to the positive auxiliary battery cable.





Text in Illustration





(b) Turn the power switch on (READY) and leave the vehicle as is until the electric current flowing into the auxiliary battery becomes 10 A or less.

(c) With the power switch on (READY), set the headlight position switch and blower motor switch to the HI position, and then turn the rear window defogger on.

(d) Measure the current and voltage according to the value(s) in the table below.





Text in Illustration





Result:





HINT
* If the values are not as specified, replace the DC/DC converter assembly.
* Some vehicle models have a hybrid vehicle converter with a built-in DC/DC converter. In this case, replace the hybrid vehicle converter.