P0A84
HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A84-123: Hybrid Battery Pack Cooling Fan 1
P0A84-123 - Hybrid Battery Pack Cooling Fan 1
DESCRIPTION
The speed of the battery cooling blower assembly (for upper side) is controlled by the hybrid vehicle control ECU in accordance with the HV battery temperature and SOC. Battery cooling blower assembly (for upper side) power is supplied when the FCTL terminal of the hybrid vehicle control ECU turns on the BATT FAN 1 relay. The hybrid vehicle control ECU sends command signals (SI0) to the battery cooling blower assembly (for upper side) to achieve the fan speed that corresponds to the HV battery temperature. Voltage (VM0) from the battery cooling blower assembly (for upper side) is used to monitor the operation of the battery cooling blower assembly (for upper side). The voltage is sent from the battery cooling blower assembly (for upper side) to the hybrid vehicle control ECU via the battery smart unit. Between the battery smart unit and the hybrid vehicle control ECU, serial communication is used.
WIRING DIAGRAM
CAUTION:
- Before inspecting the high-voltage system, 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 for 10 minutes, check the voltage at the terminals in 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.
INSPECTION PROCEDURE
PROCEDURE
1. CHECK FOR DTCS (DTC P0A1F-123 IS OUTPUT)
(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
B -- GO TO DTC CHART (P0A1F-123) Hybrid Battery System
A -- Continue to next step.
2. CHECK FUSES (BATT FAN 1 AND B-FAN RLY)
(a) Turn the power switch off.
(b) Remove the BATT FAN 1 fuse and B-FAN RLY fuse from the luggage room junction block.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE FUSE (BATT FAN 1 OR B-FAN RLY)
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR [B SIDE] - BATTERY)
(a) Install the BATT FAN 1 fuse and B-FAN RLY fuse.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
HINT
- For the removal and installation procedures related to the No. 1 battery pack wire connector inspection, Removal.
- Perform this inspection with the No. 1 battery pack wire connector connected.
NG -- INSPECT LUGGAGE ROOM JUNCTION BLOCK (BATT FAN 1 RELAY)
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR [A SIDE] - HYBRID VEHICLE CONTROL ECU)
(a) Disconnect the zR3 No. 1 battery pack wire connector.
HINT
For the removal and installation procedures related to the No. 1 battery pack wire connector inspection, Removal.
(b) Disconnect the A75 hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage (Check for +B short):
HINT
If the power switch is turned on (IG) under the conditions above, DTCs may be stored. In this case, use the Techstream to clear the DTCs.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR [B SIDE] - BATTERY COOLING BLOWER [FOR UPPER SIDE])
CAUTION:
Be sure to wear insulated gloves.
(a) Remove the HV battery Removal.
(b) Disconnect the z76 battery cooling blower assembly (for upper side) connector.
HINT
For the removal and installation procedures related to the battery cooling blower assembly (for upper side) connector inspection, Removal.
(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.
6. CHECK HARNESS AND CONNECTOR (NO. 1 BATTERY PACK WIRE CONNECTOR [B SIDE] - BATTERY COOLING BLOWER [FOR UPPER SIDE])
CAUTION:
Be sure to wear insulated gloves.
(a) 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.
7. CHECK HARNESS AND CONNECTOR (BATTERY COOLING BLOWER [FOR UPPER SIDE] - BATTERY SMART UNIT)
CAUTION:
Be sure to wear insulated gloves.
(a) Disconnect the z36 battery smart unit connector.
HINT
For the removal and installation procedures related to the battery smart unit connector inspection, Removal.
(b) 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 -- Continue to next step.
8. CHECK BATTERY COOLING BLOWER ASSEMBLY (for Upper Side) (VM0 VOLTAGE)
CAUTION:
Be sure to wear insulated gloves.
(a) Place the HV battery in the vehicle so that measurements can be made at the battery cooling blower assembly (for upper side) connector.
NOTICE:
Make sure all the covers are installed to the HV battery when placing it in the vehicle, and then remove the covers again after the HV battery is in place.
HINT
- Follow the installation procedures to the point where the HV battery is set in the vehicle Installation.
- Do not install the service plug grip.
(b) Reconnect all the connectors that were disconnected when the HV battery was removed.
(c) Connect the Techstream to the DLC3.
(d) Turn the power switch on (IG).
(e) Select the following menu items: Powertrain / Hybrid Control / Data List / VMF Fan Motor Voltage 1.
(f) Using a service wire, connect terminals z76-3 (SI0) and z76-4 (GND0) of the battery cooling blower assembly (for upper side) connector.
(g) While the battery cooling blower assembly (for upper side) is operating, compare the value in the data list ("VMF Fan Motor Voltage 1") with the voltage value that was actually measured at the battery cooling blower assembly (for upper side) connector.
Result
HINT
- Perform this inspection with the battery cooling blower assembly (for upper side) connector connected.
- If the power switch is turned on (IG) with the service plug grip removed, DTC P0A0D-350 for the interlock switch system will be set. If this DTC is output, clear the DTC using the Techstream Hybrid Battery System.
C -- REPLACE HYBRID VEHICLE CONTROL ECU Removal
B -- REPLACE BATTERY COOLING BLOWER ASSEMBLY (for Upper Side) Removal
A -- REPLACE BATTERY SMART UNIT Removal
9. INSPECT LUGGAGE ROOM JUNCTION BLOCK (BATT FAN 1 RELAY)
(a) Install the BATT FAN 1 fuse and B-FAN RLY fuse.
(b) Remove the luggage room junction block.
(c) Measure the resistance according to the value(s) in the table below.
HINT
The BATT FAN 1 relay is located inside the luggage room junction block.
Standard Resistance:
NG -- REPLACE LUGGAGE ROOM JUNCTION BLOCK (BATT FAN 1 RELAY)
OK -- Continue to next step.
10. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - HYBRID VEHICLE CONTROL ECU)
(a) Disconnect the A75 hybrid vehicle control ECU connector.
(b) Disconnect the LD luggage room junction block connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard Resistance (Check for short):
NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the terminals.
(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage (Check for +B short):
HINT
If the power switch is turned on (IG) under the conditions above, DTCs may be stored. In this case, use the Techstream to clear the DTCs Hybrid Battery System.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM JUNCTION BLOCK - NO. 1 BATTERY PACK WIRE CONNECTOR [A SIDE])
(a) Disconnect the zR3 No. 1 battery pack wire connector.
(b) Disconnect the LD luggage room junction block connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for open):
Standard resistance (Check for short):
NOTICE:
When taking measurements with an electrical tester, do not apply excessive force to the tester probes to avoid damaging the terminals.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Removal