Hino P0562 Fault Code: Battery voltage – Out Of Range (Out Of Range Low)
16/01/2025
DESCRIPTION OF MALFUNCTION
Excessive low voltage has been detected in the ECU power supply
DTC SET CONDITION
Judgment Criteria:
- Engine ECU power supply voltage is 10 V or less.
- Failure timer is more than 3 second
RESET CONDITION
After restoration to normal condition
INDICATION, WARNING OR SYSTEM CONTROL REGULATION WHEN THE DTC IS SET
- MIL: ON
- SVS light: OFF
PRE-INSPECTION WORK
Check that the battery voltage is in the normal range.
AFTER-INSPECTION WORK
- Clear all past DTC.
- Check that no DTC is detected after test drive.
POSSIBLE CAUSES
- Fusible Link, FUSE: Fusing, irregular contact, partial engagement
- Connectors, harnesses and terminals: Disconnection, irregular contact, looseness
- Battery: Over discharge, service life
- Alternator: Power generation failure
- ECU: Malfunction
INSPECTION PROCEDURE
TROUBLESHOOTING STEPS
Step 1: Inspect the fuse or fusible link
Check for fusing or improper fit
Were any failures found?
| Yes | Connect the fusible link properly or replace. Clear all past DTCs. Check that no DTC is detected after test drive |
| No | Go to Step 2 |
Step 2: Inspect the connection of the battery cable.
Check if the battery cable is properly installed (tightly fastened).
- Each battery terminal
- Alternator terminal
Were any failures found?
| Yes | Connect properly. If necessary, repair the cable. Clear all past DTCs. Check that no DTC is detected after test drive. |
| No | Go to Step 3 |
Step 3: Inspect the alternator
- Start the engine
- Use the electrical tester to measure the voltage between the alternator B terminal and ground
| MEASUREMENT CONDITIONS | TESTER CONNECTIONS | STANDARD VALUES |
| Engine idling | Alternator B – Ground | P0562: 13.5V or more |
| P0563: 14.6V or less |
Do the measurements meet the standard value?
| Yes | Go to Step 4 |
| No | Repair or replace the alternator. Clear all past DTCs. Check that no DTC is detected after test drive. |
Step 4: Inspect the engine ECU power supply
- Set the starter switch to the “LOCK” position.
- Connect the signal check harness to the engine ECU.
- Start the engine.
- Use the electrical tester to measure the voltage between the terminals of the engine ECU (signal check harness).
| MEASUREMENT CONDITIONS | TESTER CONNECTIONS | STANDARD VALUES |
| Engine idling | VB1(V18) – PGD1(V39)
VB2(V38) – PGD2(V59) VB3(V58) – PGD3(V79) VB4(V78) – PGD4(V80) |
10 – 16 V |
Do the measurements meet the standard value?
| Yes | Go to Step 5 |
| No | Check the engine ECU wire harness (power supply circuit). Repair or replace parts as needed. Clear all past DTCs. Check that no DTC is detected after test drive. |
Step 5: Check the DTC detected (Engine ECU) [Diagnostic Tool]
- Connect the vehicle to the diagnostic tool
- Set the starter switch to the “ON” position
- Select [Engine] and check if the DTC P0562 or P0563 has been detected
Has DTC P0562 or P0563 been detected?
| Yes | Replace the engine ECU. Clear all past DTCs. Check that no DTC is detected after test drive |
| No | Procedure completed. Clear all past DTCs. Check that no DTC is detected after test drive |
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