Code No. P1A4E: Power Supply Of Main Battery Cooling Fan Relay Abnormal (short circuits to earth system)

TROUBLE JUDGMENT

Check Condition

The electric motor switch is "ON" position or while the main battery is charged.

Judgement Criterion

While the main battery cooling fan relay output is turned ON, the output status signal of the main battery cooling fan relay is turned OFF (during the stop).

FAIL-SAFE AND BACKUP FUNCTION

Not available

PROBABLE CAUSES

The main battery cooling fan relay is failed.
Short circuits to earth of main battery cooling fan relay circuit; poor contact of connector
The BMU is failed.

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-115X main battery cooling fan relay connector

Q. Is the check result normal?

	Go to Step 2 .

	Repair.

STEP 2. Check the main battery cooling fan relay itself.

Check the main battery cooling fan relay itself (Refer to ).

Q. Is the check result normal?

	Go to Step 3 .

	Replace the main battery cooling fan relay.

STEP 3. Connector check: C-107 BMU connector

Q. Is the check result normal?

	Go to Step 4 .

	Repair.

STEP 4. Check harness between A-115X (terminal No. 2) main battery cooling fan relay connector and C-107 (terminal No. 12) BMU connector.

note

Before checking harness, check intermediate connector B-01, and repair if necessary.

Check output line for short circuit to earth.

Q. Is the check result normal?

	Go to Step 5 .

	Repair.

STEP 5. M.U.T.-III diagnosis code.

Q. Is the diagnosis code set?

	Replace the BMU.

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).