Up to 08/2009
HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: U029A-123: Lost Communication with Hybrid Battery Pack Sensor Module
U029A-123 - Lost Communication with Hybrid Battery Pack Sensor Module
DESCRIPTION
The battery smart unit detects the HV battery conditions (voltage, current, and temperature) and the battery cooling fan voltage, and sends the detected signals to the power management control ECU via the serial communication system.
MONITOR DESCRIPTION
If a malfunction in communication line between the battery smart unit and power management control ECU (HV CPU) is detected, the power management control ECU (HV CPU) illuminates the MIL and sets a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
CONFIRMATION DRIVING PATTERN
* Connect the Techstream to the DLC3.
* Turn the power switch on (IG) and turn the Techstream on.
* Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
* Turn the power switch off.
* Turn the power switch on (READY) and after a few seconds, turn the power switch off. [A]
* Repeat [A] 3 times. [B]
* Turn the power switch on (IG) and turn the Techstream on.
* Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]
* Check that permanent DTCs are cleared.
* If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.
HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.
WIRING DIAGRAM
INSPECTION PROCEDURE
CAUTION:
* If the battery cover is removed, install it before turning the power switch on (IG) or (READY). If the power switch is turned on (IG) or (READY) with the battery cover removed, U029A-123 may be set.
* Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
* After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.
HINT
At least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
NOTICE:
After the power switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 60 seconds before disconnecting the cable from the negative (-) battery terminal.
PROCEDURE
1. CHECK HARNESS AND CONNECTOR (IGCT VOLTAGE) P0AFC
NG -- CHECK FUSE (IGCT NO. 3)
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BATTERY SMART UNIT)
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the F97 connector from the power management control ECU Removal.
(c) 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.
(d) Remove the battery cover Removal.
(e) Remove the battery smart unit.
HINT
Disconnect only the z30 connector of the battery smart unit.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(g) Connect the cable to the negative (-) battery terminal.
(h) Turn the power switch on (IG).
(i) Measure the voltage according to the value(s) in the table below
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.
Standard Voltage:
NOTICE:
* If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream Hybrid Battery System.
* If the power switch is turned on (IG) with the connector removed from the sensor, DTC will be stored. If DTC is output, clear the DTC using the Techstream Hybrid Battery System.
(j) Connect the F97 connector to the power management control ECU Installation.
(k) Install the battery smart unit Installation.
(l) Install the battery cover.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK WAVEFORM
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Disconnect the cable from the negative (-) battery terminal.
(b) 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.
(c) Remove the battery cover Removal.
(d) Remove the battery smart unit.
HINT
Do not disconnect the battery smart unit connector.
(e) Connect the cable to the negative (-) battery terminal.
(f) Connect an oscilloscope between the battery smart unit terminals specified in the table below, and measure the waveform.
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.
* If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be stored. If this DTC is output, clear the DTC using the Techstream Hybrid Battery System.
Text in Illustration
(g) Turn the power switch off.
(h) Disconnect the cable from the negative (-) battery terminal.
(i) Install the battery smart unit Installation.
(j) Install the battery cover.
(k) Connect the cable to the negative (-) battery terminal.
NG -- REPLACE BATTERY SMART UNIT Components
OK -- REPLACE POWER MANAGEMENT CONTROL ECU Components
4. CHECK FUSE (IGCT NO. 3) P0AFC
NG -- REPLACE FUSE (IGCT NO. 3)
OK -- Continue to next step.
5. CHECK RELAY (IGCT MAIN) P0AFC
NG -- REPLACE RELAY (IGCT MAIN)
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (IGCT MAIN RELAY - BATTERY SMART UNIT)
CAUTION:
Be sure to wear insulated gloves and protective goggles.
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Remove the IGCT MAIN relay from the engine room relay block No. 2.
Text in Illustration
(c) 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.
(d) Remove the battery cover Removal.
(e) Remove the battery smart unit.
HINT
Disconnect only the z30 connector of the battery smart unit.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(g) Install the IGCT MAIN relay to the engine room relay block No. 2.
(h) Install the battery smart unit Installation.
(i) Install the battery cover.
(j) Connect the cable to the negative (-) battery terminal.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- CHECK AND REPAIR POWER SOURCE CIRCUIT