DESCRIPTION
The hybrid vehicle control ECU transmits and receives signals via CAN communication to and from the battery ECU assembly.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
---|---|---|---|---|---|
U011187 | Lost Communication with Hybrid/EV Battery Energy Control Module "A" Missing Message | The hybrid vehicle control ECU cannot receive signals from the battery ECU assembly (1 trip detection logic) |
| Comes on | Master Warning Light: Comes on |
MONITOR DESCRIPTION
If the hybrid vehicle control ECU detects a problem with CAN communication with the ECU, it will illuminate the MIL and store a DTC.
MONITOR STRATEGY
Related DTCs | U0111 (INF U011187): Lost communication with BECM (Battery bus) verify communication |
Required sensors/components | Main: Battery ECU assembly 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
Hybrid vehicle control ECU | DTC U0111 (INF U011187) is not detected |
CONFIRMATION DRIVING PATTERN
HINT:
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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
CAUTION:
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HINT:
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
*a | Without waiting for 10 minutes |
NOTICE:
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PROCEDURE
1. | CHECK DTC OUTPUT (HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery / Trouble Codes.
(d) Check and record any hybrid control system DTCs and freeze frame data. Check for DTCs.
Powertrain > HV Battery > Trouble Codes Result | Proceed to |
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DTCs related to Hybrid Battery System are not output. | A |
DTCs related to Hybrid Battery System are output. | B |
(e) Turn the power switch off.
B | GO TO DTC CHART (HYBRID BATTERY SYSTEM) |
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2. | CHECK BATTERY ECU ASSEMBLY (IGCT VOLTAGE) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery hose.
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(c) Disconnect the y16 battery ECU assembly connector.
NOTICE:
Before disconnecting the connector, check that it is not loose or disconnected.
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Measure the voltage according to the value(s) in the table below. Standard Voltage:
NOTICE:
HINT: As there might be an intermittent malfunction in the battery ECU assembly power source circuit, inspect the following even if the measured voltage is as specified:
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(f) Turn the power switch off.
(g) Disconnect the cable from the negative (-) auxiliary battery terminal.
(h) Reconnect the y16 battery ECU assembly connector.
(i) Install the No. 1 HV battery hose.
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY ECU ASSEMBLY POWER SOURCE CIRCUIT) |
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3. | CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY ECU ASSEMBLY) |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Disconnect the G59 hybrid vehicle control ECU connector.
NOTICE:
(c) Remove the No. 1 HV battery hose.
Click here
(d) Disconnect the y16 battery ECU assembly connector. NOTICE:
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(e) Measure the resistance according to the value(s) in the table below. Standard Resistance:
NOTICE: Make sure that each connector between the battery ECU assembly and hybrid vehicle control ECU is not loose or disconnected and its terminals are not deformed or corroded. |
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(f) Connect the cable to the negative (-) auxiliary battery terminal.
(g) Turn the power switch on (IG).
(h) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
y16-25 (CA1H) - Body ground | Power switch on (IG) | Below 1 V |
y16-26 (CA1L) - Body ground | Power switch on (IG) | Below 1 V |
NOTICE:
(i) Turn the power switch off.
(j) Disconnect the cable from the negative (-) auxiliary battery terminal.
(k) Reconnect the y16 battery ECU assembly connector.
(l) Install the No. 1 HV battery hose.
(m) Reconnect the G59 hybrid vehicle control ECU connector.
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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4. | CHECK HYBRID VEHICLE CONTROL ECU |
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
NOTICE:
After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.
(b) Remove the No. 1 HV battery hose.
Click here
(c) Disconnect the y16 battery ECU assembly connector. NOTICE: Before disconnecting the connector, check that it is not loose or disconnected. | |
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Turn the power switch on (IG).
(f) Measure the voltage according to the value(s) in the table below. Standard Voltage:
NOTICE:
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(g) Turn the power switch off.
(h) Disconnect the cable from the negative (-) auxiliary battery terminal.
(i) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
y16-25 (CA1H) - y16-26 (CA1L) | Power switch off | 108 to 132 Ω |
(j) Reconnect the y16 battery ECU assembly connector.
(k) Install the No. 1 HV battery protector.
OK | REPLACE BATTERY ECU ASSEMBLY |
NG | REPLACE HYBRID VEHICLE CONTROL ECU |