VALUES ON THE DIAGNOSIS TOOL CONSULT-III MONITOR ITEM

Monitor Item | Condition | Value/Status
FR WIPER HI | Other than front wiper switch HI | Off
Front wiper switch HI | On
FR WIPER LOW | Other than front wiper switch LO | Off
Front wiper switch LO | On
FR WASHER SW | Front washer switch OFF | Off
Front washer switch ON | On
FR WIPER INT | Other than front wiper switch INT | Off
Front wiper switch INT | On
FR WIPER STOP | Front wiper is not in STOP position | Off
Front wiper is in STOP position | On
INT VOLUME | Wiper intermittent dial is in a dial position 1 ‐ 7 | Wiper intermittent dial position
TURN SIGNAL R | Other than turn signal switch RH | Off
Turn signal switch RH | On
TURN SIGNAL L | Other than turn signal switch LH | Off
Turn signal switch LH | On
TAIL LAMP SW | Other than lighting switch 1ST and 2ND | Off
Lighting switch 1ST or 2ND | On
HI BEAM SW | Other than lighting switch HI | Off
Lighting switch HI | On
HEAD LAMP SW 1 | Other than lighting switch 2ND | Off
Lighting switch 2ND | On
HEAD LAMP SW 2 | Other than lighting switch 2ND | Off
Lighting switch 2ND | On
PASSING SW | Other than lighting switch PASS | Off
Lighting switch PASS | On
AUTO LIGHT SW | Other than lighting switch AUTO | Off
Lighting switch AUTO | On
FR FOG SW | NOTE： The item is indicated, but not monitored. | Off
RR FOG SW | NOTE： The item is indicated, but not monitored. | Off
DOOR SW-DR | Driver door closed | Off
Driver door opened | On
DOOR SW-AS | Passenger door closed | Off
Passenger door opened | On
DOOR SW-RR | NOTE： The item is indicated, but not monitored. | Off
DOOR SW-RL | NOTE： The item is indicated, but not monitored. | Off
DOOR SW-BK | NOTE： The item is indicated, but not monitored. | Off
CDL LOCK SW | Other than power door lock switch LOCK | Off
Power door lock switch LOCK | On
CDL UNLOCK SW | Other than power door lock switch UNLOCK | Off
Power door lock switch UNLOCK | On
KEY CYL LK-SW | NOTE： The item is indicated, but not monitored. | Off
KEY CYL UN-SW | NOTE： The item is indicated, but not monitored. | Off
KEY CYL SW-TR | NOTE： The item is indicated, but not monitored. | Off
HAZARD SW | Hazard switch is not pressed | Off
Hazard switch is pressed | On
REAR DEF SW | NOTE： The item is indicated, but not monitored. | Off
H/L WASH SW | NOTE： The item is indicated, but not monitored. | Off
TR CANCEL SW | Trunk lid opener cancel switch OFF | Off
Trunk lid opener cancel switch ON | On
TR/BD OPEN SW | Trunk lid opener switch OFF | Off
While the trunk lid opener switch is turned ON | On
TRNK/HAT MNTR | Trunk lid closed | Off
Trunk lid opened | On
RKE-LOCK | LOCK button of Intelligent Key is not pressed | Off
LOCK button of Intelligent Key is pressed | On
RKE-UNLOCK | UNLOCK button of Intelligent Key is not pressed | Off
UNLOCK button of Intelligent Key is pressed | On
RKE-TR/BD | TRUNK OPEN button of Intelligent Key is not pressed | Off
TRUNK OPEN button of Intelligent Key is pressed | On
RKE-PANIC | PANIC button of Intelligent Key is not pressed | Off
PANIC button of Intelligent Key is pressed | On
RKE-P/W OPEN | UNLOCK button of Intelligent Key is not pressed | Off
UNLOCK button of Intelligent Key is pressed and held | On
RKE-MODE CHG | LOCK/UNLOCK button of Intelligent Key is not pressed and held simultaneously | Off
LOCK/UNLOCK button of Intelligent Key is pressed and held simultaneously | On
OPTICAL SENSOR NOTE： For models without autolight system this item is not indicated. | Bright outside of the vehicle | Close to 5 V
Dark outside of the vehicle | Close to 0 V
REQ SW-DR | Driver door request switch is not pressed | Off
Driver door request switch is pressed | On
REQ SW-AS | Passenger door request switch is not pressed | Off
Passenger door request switch is pressed | On
REQ SW-RL | NOTE： The item is indicated, but not monitored. | Off
REQ SW-RR | NOTE： The item is indicated, but not monitored. | Off
REQ SW-BD/TR | Trunk lid opener request switch is not pressed | Off
Trunk lid opener request switch is pressed | On
PUSH SW | Push-button ignition switch (push switch) is not pressed | Off
Push-button ignition switch (push switch) is pressed | On
IGN RLY2 -F/B | Ignition switch in OFF or ACC position | Off
Ignition switch in ON position | On
ACC RLY -F/B | NOTE： The item is indicated, but not monitored. | Off
CLUCH SW | NOTE： The item is indicated, but not monitored. | Off
BRAKE SW 1 | The brake pedal is depressed when No. 7 fuse is blown | Off
The brake pedal is not depressed when No. 7 fuse is blown, or No. 7 fuse is normal | On
BRAKE SW 2 | The brake pedal is not depressed | Off
The brake pedal is depressed | On
DETE/CANCL SW | Shift lever in P position | Off
Shift lever in any position other than P | On
SFT PN/N SW | Shift lever in any position other than P and N | Off
Shift lever in P or N position | On
S/L -LOCK | Steering is unlocked | Off
Steering is locked | On
S/L -UNLOCK | Steering is locked | Off
Steering is unlocked | On
S/L RELAY-F/B | Ignition switch in OFF or ACC position | Off
Ignition switch in ON position | On
UNLK SEN-DR | Driver door is unlocked | Off
Driver door is locked | On
PUSH SW -IPDM | Push-button ignition switch (push-switch) is not pressed | Off
Push-button ignition switch (push-switch) is pressed | On
IGN RLY1 -F/B | Ignition switch in OFF or ACC position | Off
Ignition switch in ON position | On
DETE SW -IPDM | Shift lever in any position other than P | Off
Shift lever in P position | On
SFT PN -IPDM | Shift lever in any position other than P and N | Off
Shift lever in P or N position | On
SFT P -MET | Shift lever in any position other than P | Off
Shift lever in P position | On
SFT N -MET | Shift lever in any position other than N | Off
Shift lever in N position | On
ENGINE STATE | Engine stopped | Stop
While the engine stalls | Stall
At engine cranking | Crank
Engine running | Run
S/L LOCK-IPDM | Steering is unlocked | Off
Steering is locked | On
S/L UNLK-IPDM | Steering is locked | Off
Steering is unlocked | On
S/L RELAY-REQ | Steering lock system is not the LOCK condition and the changing condition from LOCK to UNLOCK | Off
Steering lock system is the LOCK condition or the changing condition from LOCK to UNLOCK | On
VEH SPEED 1 | While driving | Equivalent to speedometer reading
VEH SPEED 2 | While driving | Equivalent to speedometer reading
DOOR STAT-DR | Driver door is locked | LOCK
Wait with selective UNLOCK operation (5 seconds) | READY
Driver door is unlocked | UNLOCK
DOOR STAT-AS | Passenger door is locked | LOCK
Wait with selective UNLOCK operation (5 seconds) | READY
Passenger door is unlocked | UNLOCK
ID OK FLAG | Steering is locked | Reset
Steering is unlocked | Set
PRMT ENG STRT | The engine start is prohibited | Reset
The engine start is permitted | Set
PRMT RKE STRT | NOTE： The item is indicated, but not monitored. | Reset
KEY SW -SLOT | Intelligent Key is not inserted into key slot | Off
Intelligent Key is inserted into key slot | On
RKE OPE COUN1 | During the operation of Intelligent Key | Operation frequency of Intelligent Key
RKE OPE COUN2 | NOTE： The item is indicated, but not monitored. | —
CONFRM ID ALL | The key ID that the key slot receives is not recognized by any key ID registered to BCM. | Yet
The key ID that the key slot receives is recognized by any key ID registered to BCM. | Done
CONFIRM ID4 | The key ID that the key slot receives is not recognized by the fourth key ID registered to BCM. | Yet
The key ID that the key slot receives is recognized by the fourth key ID registered to BCM. | Done
CONFIRM ID3 | The key ID that the key slot receives is not recognized by the third key ID registered to BCM. | Yet
The key ID that the key slot receives is recognized by the third key ID registered to BCM. | Done
CONFIRM ID2 | The key ID that the key slot receives is not recognized by the second key ID registered to BCM. | Yet
The key ID that the key slot receives is recognized by the second key ID registered to BCM. | Done
CONFIRM ID1 | The key ID that the key slot receives is not recognized by the first key ID registered to BCM. | Yet
The key ID that the key slot receives is recognized by the first key ID registered to BCM. | Done
TP 4 | The ID of fourth Intelligent Key is not registered to BCM | Yet
The ID of fourth Intelligent Key is registered to BCM | Done
TP 3 | The ID of third Intelligent Key is not registered to BCM | Yet
The ID of third Intelligent Key is registered to BCM | Done
TP 2 | The ID of second Intelligent Key is not registered to BCM | Yet
The ID of second Intelligent Key is registered to BCM | Done
TP 1 | The ID of first Intelligent Key is not registered to BCM | Yet
The ID of first Intelligent Key is registered to BCM | Done

TERMINAL LAYOUT
PHYSICAL VALUES

Terminal No. (Wire color) | Description | Condition | Value (Approx.)
Signal name | Input/ Output
+ | –
1 (GR) | Ground | Battery power supply | Input | Ignition switch OFF | Battery voltage
2 (R) | Ground | P/W power supply (BAT) | Output | Ignition switch OFF | Battery voltage
3 (W) | Ground | P/W power supply (RAP) | Output | Ignition switch ON | Battery voltage
4 (R) | Ground | Interior room lamp power supply | Output | After passing the interior room lamp battery saver operation time | 0 V
Any other time after passing the interior room lamp battery saver operation time | Battery voltage
5 (G) | Ground | Passenger door UNLOCK | Output | Passenger door | UNLOCK (Actuator is activated) | Battery voltage
Other than UNLOCK (Actuator is not activated) | 0 V
7 (Y) | Ground | Step lamp | Output | Step lamp | ON | 0 V
OFF | Battery voltage
8 (V) | Ground | All doors, fuel lid LOCK | Output | All doors, fuel lid | LOCK (Actuator is activated) | Battery voltage
Other than LOCK (Actuator is not activated) | 0 V
9 (G) | Ground | Driver door, fuel lid UNLOCK | Output | Driver door, fuel lid | UNLOCK (Actuator is activated) | Battery voltage
Other than UNLOCK (Actuator is not activated) | 0 V
11 (R) | Ground | Battery power supply | Input | Ignition switch OFF | Battery voltage
13 (B) | Ground | Ground | — | Ignition switch ON | 0 V
14 (P) | Ground | Push-button ignition switch illumination ground | Output | Tail lamp | OFF | 0 V
ON | NOTE： When the illumination brightening/dimming level is in the neutral position
15 (Y) | Ground | ACC indicator lamp | Output | Ignition switch | OFF (LOCK indicator is not illuminated) | Battery voltage
ACC or ON | 0 V
17 (W) | Ground | Turn signal RH (Front) | Output | Ignition switch ON | Turn signal switch OFF | 0 V
Turn signal switch RH | 6.5 V
18 (O) | Ground | Turn signal LH (Front) | Output | Ignition switch ON | Turn signal switch OFF | 0 V
Turn signal switch LH | 6.5 V
19 (V) | Ground | Room lamp timer control | Output | Interior room lamp | OFF | Battery voltage
ON | 0 V
20 (SB) | Ground | Turn signal RH (Rear) | Output | Ignition switch ON | Turn signal switch OFF | 0 V
Turn signal switch RH | 6.5 V
23 (G) | Ground | Trunk lid open | Output | Trunk lid | Open (Trunk lid opener actuator is activated) | Battery voltage
Close (Trunk lid opener actuator is not activated) | 0 V
25 (V) | Ground | Turn signal LH (Rear) | Output | Ignition switch ON | Turn signal switch OFF | 0 V
Turn signal switch LH | 6.5 V
30 (O) | Ground | Trunk room lamp | Output | Trunk room lamp | ON | 0 V
OFF | Battery voltage
34 (P) | Ground | Trunk room antenna (-) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
35 (L) | Ground | Trunk room antenna (+) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
38 (R) | Ground | Rear bumper antenna (-) | Output | When the trunk lid opener request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
39 (BR) | Ground | Rear bumper antenna (+) | Output | When the trunk lid opener request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
47 (Y) | Ground | Ignition relay (IPDM E/R) control | Output | Ignition switch | OFF or ACC | Battery voltage
ON | 0 V
50 (R) | Ground | Trunk room lamp switch | Input | Trunk room lamp switch | OFF (Trunk is closed) | 11.8 V
ON (Trunk is open) | 0 V
52 (SB) | Ground | Starter relay control | Output | Ignition switch ON | When shift lever is in P or N position | Battery voltage
When shift lever is not in P or N position | 0 V
61 (W) | Ground | Trunk lid opener request switch | Input | Trunk lid opener request switch | ON (Pressed) | 0 V
OFF (Not pressed) | 1.0 V
64 (O) | Ground | Intelligent Key warning buzzer (Engine room) | Output | Intelligent Key warning buzzer (Engine room) | Sounding | 0 V
Not sounding | Battery voltage
67 (G) | Ground | Trunk lid opener switch | Input | Trunk lid opener switch | Pressed | 0 V
Not pressed | 11.8 V
72 (R) | Ground | Room antenna 2 (-) (Center console) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
73 (G) | Ground | Room antenna 2 (+) (Center console) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
74 (SB) | Ground | Passenger door antenna (-) | Output | When the passenger door request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
75 (BR) | Ground | Passenger door antenna (+) | Output | When the passenger door request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
76 (V) | Ground | Driver door antenna (-) | Output | When the driver door request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
77 (LG) | Ground | Driver door antenna (+) | Output | When the driver door request switch is operated with ignition switch OFF | When Intelligent Key is in the antenna detection area |
When Intelligent Key is not in the antenna detection area |
78 (Y) | Ground | Room antenna 1 (-) (Instrument panel) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
79 (BR) | Ground | Room antenna 1 (+) (Instrument panel) | Output | Ignition switch OFF | When Intelligent Key is in the passenger compartment |
When Intelligent Key is not in the passenger compartment |
80 (GR) | Ground | NATS antenna amp. | Input/Output | During waiting | Ignition switch is pressed while inserting the Intelligent Key into the key slot. | Just after pressing ignition switch. Pointer of tester should move.
81 (L) | Ground | NATS antenna amp. | Input/Output | During waiting | Ignition switch is pressed while inserting the Intelligent Key into the key slot. | Just after pressing ignition switch. Pointer of tester should move.
82 (R) | Ground | Ignition relay [fuse block (J/B)] control | Output | Ignition switch | OFF or ACC | 0 V
ON | Battery voltage
83 (Y) | Ground | Remote keyless entry receiver communication | Input/Output | During waiting |
When operating either button on Intelligent Key |
87 (BR) | Ground | Combination switch INPUT 5 | Input | Combination switch | All switches OFF (Wiper intermittent dial 4) | 1.4 V
Any of the conditions below with all switches OFF

- Wiper intermittent dial 1
- Wiper intermittent dial 2
- Wiper intermittent dial 6
- Wiper intermittent dial 7

1.3 V
88 (V) | Ground | Combination switch INPUT 3 | Input | Combination switch | All switches OFF (Wiper intermittent dial 4) | 1.4 V
Lighting switch HI (Wiper intermittent dial 4) | 1.3 V
Lighting switch 2ND (Wiper intermittent dial 4) | 1.3 V
Any of the conditions below with all switches OFF

- Wiper intermittent dial 1
- Wiper intermittent dial 2
- Wiper intermittent dial 3

1.3 V
89 (BR) | Ground | Push-button ignition switch (push switch) | Input | Push-button ignition switch (push switch) | Pressed | 0 V
Not pressed | Battery voltage
90 (P) | Ground | CAN ‐ L | Input/ Output | — | —
91 (L) | Ground | CAN ‐ H | Input/ Output | — | —
92 (LG) | Ground | Key slot illumination | Output | Key slot illumination | OFF | Battery voltage
Blinking | 6.5 V
ON | 0 V
93 (V) | Ground | ON indicator lamp | Output | Ignition switch | OFF (LOCK indicator is not illuminated) | Battery voltage
ON or ACC | 0 V
95 (O) | Ground | ACC relay control | Output | Ignition switch | OFF | 0 V
ACC or ON | Battery voltage
96 (SB) | Ground | A/T shift selector (detention switch) power supply | Output | — | Battery voltage
97 (L) | Ground | Steering lock condition No. 1 | Input | Steering lock | LOCK status | 0 V
UNLOCK status | Battery voltage
98 (R) | Ground | Steering lock condition No. 2 | Input | Steering lock | LOCK status | Battery voltage
UNLOCK status | 0 V
99 (G) | Ground | Shift lever P position switch | Input | Shift lever | P position | 0 V
Any position other than P | Battery voltage
100 (W) | Ground | Passenger door request switch | Input | Passenger door request switch | ON (Pressed) | 0 V
OFF (Not pressed) | 1.0 V
101 (V) | Ground | Driver door request switch | Input | Driver door request switch | ON (Pressed) | 0 V
OFF (Not pressed) | 1.0 V
102 (O) | Ground | Blower fan motor relay control | Output | Ignition switch | OFF or ACC | 0 V
ON | Battery voltage
103 (LG) | Ground | Remote keyless entry receiver power supply | Output | Ignition switch OFF | Battery voltage
106 (P) | Ground | Steering lock unit power supply | Output | Ignition switch | OFF or ACC | Battery voltage
ON | 0 V
107 (LG) | Ground | Combination switch INPUT 1 | Input | Combination switch (Wiper intermittent dial 4) | All switches OFF | 1.4 V
Turn signal switch LH | 1.3 V
Turn signal switch RH | 1.3 V
Front wiper switch LO | 1.3 V
Front washer switch ON | 1.3 V
108 (R) | Ground | Combination switch INPUT 4 | Input | Combination switch | All switches OFF (Wiper intermittent dial 4) | 1.4 V
Lighting switch AUTO (Wiper intermittent dial 4) | 1.3 V
Lighting switch 1ST (Wiper intermittent dial 4) | 1.3 V
Any of the conditions below with all switches OFF

- Wiper intermittent dial 1
- Wiper intermittent dial 5
- Wiper intermittent dial 6

1.3 V
109 (Y) | Ground | Combination switch INPUT 2 | Input | Combination switch (Wiper intermittent dial 4) | All switches OFF | 1.4 V
Lighting switch PASS | 1.3 V
Lighting switch 2ND | 1.3 V
Front wiper switch INT | 1.3 V
Front wiper switch HI | 1.3 V
110 (G) | Ground | Hazard switch | Input | Hazard switch | Pressed | 0 V
Not pressed | 1.1 V
111 (Y) | Ground | Steering lock unit communication | Input/Output | Steering lock | LOCK status | Battery voltage
LOCK or UNLOCK |
For 15 seconds after UNLOCK | Battery voltage
15 seconds or later after UNLOCK | 0 V
113 (P) | Ground | Optical sensor | Input | Ignition switch ON | When bright outside of the vehicle | Close to 5 V
When dark outside of the vehicle | Close to 0 V
116 (SB) | Ground | Stop lamp switch 1 | Input | — | Battery voltage
118 (P) | Ground | Stop lamp switch 2 | Input | Stop lamp switch | OFF (Brake pedal is not depressed) | 0 V
ON (Brake pedal is depressed) | Battery voltage
119 (SB) | Ground | Driver side door lock actuator (Unlock sensor) | Input | Driver door | LOCK status (Unlock sensor switch OFF) | 11.8 V
UNLOCK status (Unlock sensor switch ON) | 0 V
121 (R) | Ground | Key slot switch | Input | When Intelligent Key is inserted into key slot | Battery voltage
When Intelligent Key is not inserted into key slot | 0 V
123 (BR) | Ground | IGN feedback | Input | Ignition switch | OFF or ACC | 0 V
ON | Battery voltage
124 (LG) | Ground | Passenger door switch | Input | Passenger door switch | OFF (When passenger door closes) | 11.8 V
ON (When passenger door opens) | 0 V
128 (P) | Ground | Door lock and unlock switch LOCK | Input | Door lock and unlock switch (power window main switch or power window sub-switch) | NEUTRAL position | 11.8 V
LOCK position | 0 V
129 (O) | Ground | Trunk lid opener cancel switch | Input | Trunk lid opener cancel switch | CANCEL | 1.1 V
ON | 0 V
131 (BR) | Ground | Door lock and unlock switch UNLOCK | Input | Door lock and unlock switch (power window main switch or power window sub-switch) | NEUTRAL position | 11.8 V
LOCK position | 0 V
133 (W) | Ground | Push-button ignition switch illumination | Output | Push-button ignition switch illumination | ON (When tail lamps OFF) | 5.5 V
ON (When tail lamps ON) | NOTE： The pulse width of this wave is varied by the illumination brightening/dimming level.
OFF | 0 V
134 (GR) | Ground | LOCK indicator lamp | Output | LOCK indicator lamp | ON | 0 V
OFF | Battery voltage
137 (L) | Ground | Receiver and sensor ground | Input | Ignition switch ON | 0 V
138 (Y) | Ground | Receiver and sensor power supply | Output | Ignition switch | OFF | 0 V
ACC or ON | 5.0 V
140 (BR) | Ground | Shift lever P/N position | Input | Shift lever | P or N position | 12 V
Except P and N positions | 0 V
141 (G) | Ground | Security indicator | Output | Security indicator | ON | 0 V
Blinking | 11.3 V
OFF | Battery voltage
142 (O) | Ground | Combination switch OUTPUT 5 | Output | Combination switch (Wiper intermittent dial 4) | All switches OFF | 0 V
Lighting switch 1ST | 10.7 V
Lighting switch HI
Lighting switch 2ND
Turn signal switch RH
143 (P) | Ground | Combination switch OUTPUT 1 | Output | Combination switch | All switches OFF (Wiper intermittent dial 4) | 0 V
Front wiper switch HI (Wiper intermittent dial 4) | 10.7 V
Any of the conditions below with all switches OFF

- Wiper intermittent dial 1
- Wiper intermittent dial 2
- Wiper intermittent dial 3
- Wiper intermittent dial 6
- Wiper intermittent dial 7

144 (G) | Ground | Combination switch OUTPUT 2 | Output | Combination switch | All switches OFF (Wiper intermittent dial 4) | 0 V
Front washer switch ON (Wiper intermittent dial 4) | 10.7 V
Any of the conditions below with all switches OFF

- Wiper intermittent dial 1
- Wiper intermittent dial 5
- Wiper intermittent dial 6

145 (L) | Ground | Combination switch OUTPUT 3 | Output | Combination switch (Wiper intermittent dial 4) | All switches OFF | 0 V
Front wiper switch INT | 10.7 V
Front wiper switch LO
Lighting switch AUTO
146 (SB) | Ground | Combination switch OUTPUT 4 | Output | Combination switch (Wiper intermittent dial 4) | All switches OFF | 0 V
Lighting switch 2ND | 10.7 V
Lighting switch PASS
Turn signal switch LH
150 (GR) | Ground | Driver door switch | Input | Driver door switch | OFF (When driver door closes) | 11.8 V
ON (When driver door opens) | 0 V
151 (G) | Ground | Rear window defogger relay control | Output | Rear window defogger | Active | 0 V
Not activated | Battery voltage