Code No. C2005:
Power supply low voltage 1 (VP) Code No. C2006: Power supply low voltage 2 (VP)
HIGH VOLTAGE POWER SUPPLY CONTROL SYSTEM
OPERATION
The EV-ECU control power supply is applied to the EV-ECU via a fuse with the power switch
set to the ON position.
DIAGNOSIS CODE SET CONDITIONS
When the control power supply voltage of 10 V or less
continues, the diagnosis code No. C2005 will be set.
When the control power supply voltage of 8.5 V or less continues, the diagnosis
code No. C2006 will be set.
PROBABLE CAUSES
The electric motor switch is left in the ACC or ON position,
not used for long time
Malfunction of the auxiliary battery
Damaged wiring harness or connector(s)
Malfunction of the DC-DC converter
Malfunction of the EV-ECU
DIAGNOSIS PROCEDURE
STEP 1. ?Check whether the diagnosis code is set.
Check if the diagnosis code No. P0A09 for other systems is set to the EV-ECU.
Q.
Is the diagnosis code set?
Carry out troubleshooting for the diagnosis code P0A09. (Refer to .)
Go to Step 2.
STEP 2. Auxiliary battery check
Refer to GROUP 54A - Battery Test .
Q.
Is the check result normal?
Go to Step 3.
Charge the auxiliary battery. (Refer to GROUP 54A - Charge .)
Or, replace the auxiliary battery. (Refer to GROUP 54A - Battery Removal and Installation .)
STEP 3. Connector check: E-01 on board charger/DC-DC converter
connecter, fusible link (No. 26)
Q.
Is the check result normal?
Go to Step 4.
Repair the damaged connector.
STEP 4. Check the wiring harness between E-01 on board charger/DC-DC
converter connector terminal No. 1 and the fusible link (No. 26).
Check the power supply line for open circuit.
Q.
Is the check result normal?
Go to Step 5.
Repair the wiring harness.
STEP 5. Voltage measurement at A-08X EV control relay (relay box)
connecter
(1)Disconnect the EV control relay, and measure the voltage at the wiring harness
side.
(2)Turn the electric motor switch to the "ON" position.
(3)Measure the voltage between the A-08X EV-ECU connector terminal No. 4 and the body
earth. OK: Battery voltage
Q.
Is the check result normal?
Go to Step 8.
Go to Step 6.
STEP 6. Connector check: A-08X EV control relay (relay box) connecter
Q.
Is the check result normal?
Go to Step 7.
Correct or replace the relay box.
STEP 7. Check the wiring harness between A-08X EV control relay (relay
box) connector terminal No. 4 and the relay box fuse (No. 7).
Check the power supply line for open circuit.
Q.
Is the check result normal?
Go to Step 8.
Repair the wiring harness.
STEP 8. EV control relay check
Check the EV control relay. (Refer to .)
Q.
Is the check result normal?
Go to Step 9.
Replace the EV control relay.
STEP 9. Connector check: C-111 EV-ECU, B-27 intermediate, A-08X EV
control relay (relay box) connecter
Q.
Is the check result normal?
Go to Step 10.
Repair the damaged connector.
STEP 10. Check the wiring harness between A-08X EV control relay (relay
box) connector terminal No. 1 and C-111 EV-ECU connector terminal No. 120.
Check the power supply line for open circuit.
Q.
Is the check result normal?
Go to Step 11.
Repair the wiring harness.
STEP 11. M.U.T.-III actuator test and service data
Perform the actuator test (refer to ), and check
the service data of the EV control relay (refer to ).
Actuator test
Item No. 2 : 12 V DC DC shutdown
Data list
Item No. 83 : Control power supply voltage
OK: The voltage value varies between 3.7 V and 3.9 V / 3.3 V and 3.5 V
depending on activation / deactivation of the DC-DC converter.
Q.
Is the check result normal?
Go to Step 12.
Carry out the troubleshooting for the EV-ECU diagnosis code P0A09. (Refer to .)
STEP 12. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
(3)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Replace the EV-ECU. (Refer to .) Then go to
Step 13.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction .)
STEP 13. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the "LOCK" (OFF) position to the "ON" position.
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Carry out troubleshooting for the diagnosis code P0A09. (Refer to 
.)
Go to Step 2.