P0A08-264 - DC / DC Converter Status Circuit
L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0A08-264: DC / DC Converter Status Circuit
P0A08-264 - DC / DC Converter Status Circuit
DESCRIPTION
For a description of the hybrid vehicle converter (DC/DC converter), P0A09.
WIRING DIAGRAM
INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. 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. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HV CONTROL ECU CONNECTOR)
(a) Turn the power switch off.
(b) Check the connections of the hybrid vehicle control ECU connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK FRAME WIRE (ENGINE ROOM R/B NO. 1 SIDE)
(a) Check that the nuts for the frame wire terminals are tightened to the specified torque, the frame wire terminals are connected securely, and there are no contact problems.
Torque:
12 N*m (124 kgf*cm, 9 ft.*lbf)
(b) Check for arc marks at the bolts for the frame wire.
Result:
(c) Turn the power switch off.
C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
4. CHECK FUSES
(a) Measure the resistance of the headlight system fuses, A/C blower system, defogger system, stop light system and power window system.
OK:
Below 1 Ohms
HINT
If any of the fuses is broken, replace the fuse and repair the shorted circuit.
NG -- REPAIR OR REPLACE SHORTED CIRCUIT AND REPLACE BROKEN FUSE
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (RESISTANCE VALUE OF NODD INSIDE HV CONTROL ECU)
(a) Disconnect the battery pack wire connector Components.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
OK -- Continue to next step.
6. CHECK FRAME WIRE (HYBRID VEHICLE CONVERTER SIDE)
(a) Check that the nut for the frame wire terminal is tightened to the specified torque, the frame wire terminal is connected securely, and there are no contact problems.
Torque:
9.0 N*m (92 kgf*cm, 80 in.*lbf)
(b) Check for arc marks at the bolts for the frame wire.
Result:
(c) Turn the power switch off.
C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
7. CHECK HYBRID VEHICLE CONVERTER (INSTALLATION CONDITION)
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) Check that the hybrid vehicle converter installation bolts, battery carrier sub-assembly installation bolts, battery carrier sub-assembly installation nuts and HV battery assembly installation bolt are tightened to the specified torque. Check that the hybrid vehicle converter installation bolts, battery carrier sub-assembly installation bolts, battery carrier sub-assembly installation nuts and HV battery assembly installation bolt are connected securely and that there are no contact problems.
Torque:
Bolt A
20 N*m (204 kgf*cm, 15 ft.*lbf)
Bolt B
8.2 N*m (82 kgf*cm, 71 in.*lbf)
Nut
8.2 N*m (82 kgf*cm, 71 in.*lbf)
(c) Check for arc marks at each nut and bolt.
Result:
HINT
Because the hybrid vehicle converter is grounded to the body, DTC P0A08-264 may be set if there are any contact or connection problems.
C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
8. CHECK CONNECTOR CONNECTION CONDITION (HV RELAY ASSEMBLY CONNECTOR)
CAUTION:
Be sure to wear insulated gloves.
(a) Turn the power switch off and remove the service plug grip L110 Hybrid Vehicle Control System.
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) Check the connections of the HV relay assembly connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
9. CHECK HV RELAY ASSEMBLY (ELECTRIC VEHICLE FUSE)
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is removed.
(b) Measure the resistance according to the the value(s) in the table below.
Standard resistance:
NG -- REPLACE ELECTRIC VEHICLE FUSE Components
OK -- Continue to next step.
10. CHECK HV RELAY ASSEMBLY (ELECTRIC VEHICLE FUSE)
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) Check that the bolts for the electric vehicle fuse are tightened to the specified torque, the electric vehicle fuse are connected securely, and there are no contact problems.
Torque:
4.5 N*m (46 kgf*cm, 40 in.*lbf)
(c) Check for arc marks at the bolts for the electric vehicle fuse terminals.
Result:
C -- CONNECT SECURELY
B -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
A -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (BATTERY PACK WIRE - HYBRID VEHICLE CONVERTER)
CAUTION:
Be sure to wear insulated gloves.
(a) Check that the service plug grip is not installed.
(b) Disconnect connector N1 from the hybrid vehicle converter Components.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
12. INSPECT HYBRID VEHICLE CONVERTER
(a) Connect all the disconnected connectors.
(b) Install the service plug grip.
(c) Measure the current output from the hybrid vehicle converter with the headlight position switch and blower motor switch in the HI position, and the rear window defogger turned on (*1).
(d) Measure the auxiliary battery voltage according to the value(s) in the table below when conditions (*1) are met.
Result:
NG -- REPLACE HYBRID VEHICLE CONVERTER Components
OK -- Continue to next step.
13. CHECK FOR INTERMITTENT PROBLEMS
(a) Check for intermittent problems L110 Hybrid Vehicle Control System.
YES -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
NO -- Continue to next step.
14. CHECK PACKAGE TRAY TRIM PANEL ASSEMBLY
HINT
For details about the hybrid vehicle converter cooling duct, refer to the description for DTC P0A08-101 P0A08.
(a) Check that the air intake grill of the package tray trim panel assembly is not clogged.
OK:
The air intake grill is not clogged.
NG -- REMOVE FOREIGN OBJECT
OK -- Continue to next step.
15. CHECK AIR DUCT (ALL)
HINT
For details about the hybrid vehicle converter cooling duct, refer to the description for DTC P0A08-101 P0A08.
(a) Check if the duct is installed correctly.
Result:
The duct is installed correctly.
(b) Check the duct for clogging.
Result:
The duct is not clogged.
NG -- REPAIR OR REPLACE AIR DUCT (ALL)
OK -- REPLACE HYBRID VEHICLE CONVERTER Components
16. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - BATTERY PACK WIRE CONNECTOR)
(a) Disconnect connector A54 from the hybrid vehicle control ECU.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
HINT
Turning the power switch on (IG) with the service plug grip removed causes an interlock switch system DTC (P0A0D-350) to be set.
Standard voltage:
(d) Turn the power switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components