DESCRIPTION
Auxiliary battery power is supplied to the BATT terminal of the hybrid vehicle control ECU in order to store DTCs and freeze frame data. Even if the ignition switch is turned off, back-up power is supplied.
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
---|---|---|---|---|---|---|
P056014 | System Voltage (BATT) Circuit Short to Ground or Open |
Malfunction in the hybrid vehicle control ECU back-up power source circuit (1 trip detection logic) |
| Comes on |
Master Warning: Comes on |
SAE Code: P0562 |
MONITOR DESCRIPTION
If a period of time has elapsed with a low voltage at the BATT terminal of the hybrid vehicle control ECU, the hybrid vehicle control ECU will determine that a malfunction has occurred in the back-up power supply system, and it will store a DTC. The MIL will illuminate the next time the ignition switch ON.
MONITOR STRATEGY
Related DTCs | P0562 (INF P056014): System voltage range check (Low voltage) |
Required sensors/components | Main: Back-up power source circuit Sub: Hybrid vehicle control ECU |
Frequency of operation | Continuous |
Duration | TMC's intellectual property |
MIL operation | Immediately |
Sequence of operation | None |
TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored |
TMC's intellectual property |
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
Auxiliary battery voltage | Between 9 and 14 V |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
Click here
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
PROCEDURE
1. | CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) |
(a) Check the connector connections and contact pressure of the relevant terminals for the hybrid vehicle control ECU connectors. Click here OK: The connectors are connected securely and there are no contact pressure problems. |
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NG | ![]() | CONNECT SECURELY |
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2. | CHECK HARNESS AND CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU) |
(a) Turn the ignition switch off.
(b) Measure the voltage according to the value(s) in the table below.
*a | Component with harness connected (Hybrid Vehicle Control ECU) |
- | - |
Standard Voltage:
Tester Connection | Condition |
Specified Condition |
---|---|---|
I249-13 (BATT) - I249-1 (E1) |
Ignition switch off |
11 to 14 V |
OK | ![]() | REPLACE HYBRID VEHICLE CONTROL ECU |
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3. | CHECK FUSE (ECU-B NO. 2) |
(a) Remove the ECU-B NO. 2 fuse from the power distribution box assembly.
(b) Check if there is an open circuit in the ECU-B NO. 2 fuse in the power distribution box assembly.
OK:
There is no open circuit in the ECU-B NO. 2 fuse.
(c) Install the ECU-B NO. 2 fuse.
OK | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE OF HYBRID VEHICLE CONTROL ECU) |
NG | ![]() | REPLACE FUSE (ECU-B NO. 2) |