Hino P0562 Fault Code
Technical Description
DCU receives electric power from battery.
Description Of Malfunction
Low voltage malfunction is detected in battery voltage (DCU power
circuit).
DTC Set Condition
DTC Detection Condition:
Starter switch ON.
Judgment Criteria:
Battery voltage is less than 9 V.
Reset Condition
After having restored to the normal conditions.
Indication, Warning Or System Control Regulation When The DTC Is Set
- MIL: ON
- DEF injection is stopped.
- NOx reduction quantity monitoring is aborted.
SYMPTOMS ON THE VEHICLE WHEN THE DTC IS SET
Symptoms on the Vehicle Due to Backup Control (Fail Safe Function):
NOx reduction function is prevented.
Pre – Inspection Work
Check if the battery voltage is in the normal range.
After – Inspection Work
- Clear all past DTCs.
- Check if no DTC is stored after test drive.
Possible Causes
- Battery terminal harness is disconnected.
- Battery is dead.
- Harness connection is faulty.
Inspection Procedure
Troubleshooting Steps
Step 1) Inspect the DCU 53P connector.
Check the connection of the DCU 53P connector (Looseness and poor contact).
Was any failure found?
| Yes – Connect securely, repair if needed.
Clear all past DTCs. Check if no DTC is stored after test drive. |
No – Go to Step 2. |
Step 2) Inspect the voltage of the DCU power supply.
- Set the starter switch to the “LOCK” position.
- Disconnect the DCU 53P connector.
- Connect the signal check harness and use the electrical tester to measure the voltage between the terminals of the DCU 53P vehicle-side connector.
| MEASUREMENT CONDITIONS | TESTER CONNECTIONS | STANDARD VALUES |
| Starter switch:
LOCK |
DCU 53P vehicle-side connector
+B3 – GND1 |
9 – 16 V |
Do the measurements meet the standard value?
| Yes – Go to Step 3. | No – Repair or replace the DCU power supply circuit (FUSE to DCU).
Clear all past DTCs. Check if no DTC is stored after test drive. |
Step 3) Check the DTC detected (DCU) [Diagnostic Tool].
- Connect the vehicle to the diagnostic tool.
- Set the starter switch to the “ON” position.
- Select [DCU] and check if the P0562 has been detected.
Has DTC P0562 been detected?
| Yes – Replace the DCU. (After replacing the DCU, perform a forced regeneration.)
Clear all past DTCs. Check if no DTC is stored after test drive. |
No – Procedure completed.
Clear all past DTCs. Check if no DTC is stored after test drive. |
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