ECUs and PIDs Discovered on the Prius

The name of the data item in the section heading is what I think the THHS might display.  The names are taken from Richard's post 5299, matched by guesswork to the filenames of data captures.  Some can be verified against pictures Richard took of the THHS screen.

Explanation of Table

ECU - address of ECU having this information item
PID - parameter ID to obtain this information item
Size - size of data part of response, excluding service ID and PID octets
Data - location in the response of data octets for this item, 1 = first octet, etc.
Format - how Mini-Scanner converts the data to real-world units
Ver - first version of Mini-Scanner firmware supporting this information item

Battery ECU, address = 0xD5, data rate 10.4 kbit/s

The table entry is the number of data items obtained via the PID (discovered so far).  The link takes you to what we know about the data items from Richard's August 2003 captures.  A dash indicates that it has been confirmed that the ECU does not respond to a request for this PID.  An empty box indicates work to be done.  A question mark indicates a valid PID, but we don't know what it does.

Items from Richard's post 5299 for which we don't yet have PIDs (Battery ECU):

• NORMAL STATUS
• PRE ONBOARD CH
• ONBOARD CHARGE
• OFF AVE CHG ST
• COOLING FAN LO
• COOLING FAN MID
• COOLING FAN HI
• ONB CHARGE TIME
• IG ON HOUR <- this would be nice to have

In "ecupids.txt", Richard mentions these currently not understood PIDs:

62, 63, 64, 98, C3, E1

In "allpids.txt", Richard also tabulated responses at these PIDs:

00, 20 (but not 40) 60, 80, A0, C0, E0 (supported PID maps)
01, 1C, 61, 70, 71, 73, 74, 82, 84, 85, 87, 89, 8A, 8C, 90, EC (but no B?)

Aux Bat Volt, PID = 0xB7

Richard gets 0xB1 (177) in capture "bat-aux-bat-volt-13.828v"
-> 13.828V (?? to three places ??) on THHS (no picture)

Batt Inside Air, PID = 0xB2

Richard gets 0x47 (71) in capture "bat-bat-inside-air-31_c" -> 31°C on THHS (no picture)

Batt Temp 1, 2 and 3, PID = 0xD0

Batt Temp 1

Richard gets 0x4C, 0x49, 0x49 (76, 73, 73) in capture "bat-ib-bat-temp-1-36_c" -> 36°C on THHS (no picture)

Batt Temp 2

Richard gets 0x4C, 0x49, 0x49 (76, 73, 73) in capture "bat-bat-temp-2-33_c" -> 33°C on THHS (no picture)

Batt Temp 3

Richard gets 0x4C, 0x49, 0x49 (76, 73, 73) in capture "bat-bat-temp-3-33_c" -> 33°C on THHS (no picture)

Batt Temp 4, PID = 0xD1

Richard gets 0x47 (71) in capture "bat-bat-temp-4-31_c" -> 31°C on THHS (no picture)

Battery Lo Time, PID = 0x97

Richard gets 0x00, 0x00 in capture "bat-batter-lo-times-0" -> 0 on THHS (no picture)

However, the name of the item given in Richard's post #5299, "Battery Lo Time", suggests that it might be a timer rather than a counter.  Also, the name "Battery Too Hi#" suggests a battery (block?) number.  Pictures of the THHS are not available for these items.

Battery Too Hi#, PID = 0xB4

Richard gets 0x00, 0x00 in capture "bat-battery-too-hi-times" -> 0 on THHS (no picture)

CCtl, EQC0 DF Relay, and EQTR Charge St PID = 0xC2

CCtl

Richard gets 0x08 in capture "bat-cctl-on" -> "on" on THHS (no picture)

TO DO - Try to figure out what it means.  Cruise control?  Climate Control?

EQC0 DF Relay

Richard gets 0x08 in capture "bat-eqc0-df-relay-off" -> "off" on THHS (no picture)

EQTR Charge St

Richard gets 0x08 in capture "bat-eqtr-charge-stat-off" -> "off" on THHS (no picture)

cooling-fan-hi-cmd-on, PID = 0x??

Richard's capture "bat-cooling-fan-hi-cmd-on" contains many PIDs

In among the mode 1 requests and responses, there are messages like this:
    0x84 0xD5 0xF1 0x30 0x81 0x08 0x08 0x0B
    0x82 0xF1 0xD5 0x70 0x81 0x39
It looks as if the THHS is sending two octets of data to PID 0x81 of the battery ECU.  Towards the beginning of the file, the second data octet is often 0x00.

Richard's post #5299 lists COOLING FAN LO, COOLING FAN MID and COOLING FAN HI.  Presumably, these are yet to be discovered.

DC Inhibit Time, PID = 0x99

Richard gets 0x00, 0x00 in capture "bat-dc-inhibit-times-0" -> 0 on THHS (no picture)

Again, the name of the item given in Richard's post #5299, "DC Inhibit Time", suggests that it might be a timer rather than a counter.  Would it really be 16 bits if it were a counter?  Could someone run up a steep hill and figure this out?

Delta SoC, PID = 0xBC

Richard gets 0x28 (40) in capture "bat-delta-soc-20" -> 20 on THHS (no picture)

TO DO - figure out what it means.  I always seem to get 40, just like Richard.

DTC, PID = 0x9C

Richard gets 0x00, 0x34 in capture "bat-dtc-cnt-0" -> 0 on THHS (no picture)

Ok, the count might be the first octet?  So, what's the second octet?

ECU Code, PID = 0xD3

Richard gets 0x34, 0x37, 0x30, 0x33, 0x30, 0x41 in capture "bat-ecu-code-47030A" -> 47030A on THHS (no picture)

Et Off Chr Hr, PID = 0x9A

Richard gets 0x00 in capture "bat-et-off-chr-hr-0.00hr" -> 0.00hr on THHS (no picture)

IB Main Battery, PID = 0xA3

Richard gets 0x32, 0x9F to 0x32, 0xA3 in capture "bat-ib-main-bat-1.54" -> 1.54 on THHS (no picture)

Ig Off Hour, PID = 0x9B

Richard gets 0x00, 0x07 in capture "bat-ig-off-7hr" -> 7hr on THHS (no picture)

Need to park for a couple of weeks to find out if this is 8 bits or 16 bits.  Where is Ig On Hour?

off-av-cg-relay-cmd, PID = 0x??

Richard's capture "bat-off-av-cg-relay-cmd" contains many PIDs (no picture).

Perhaps it was a command from the THHS to the car.  The capture contains this:
    0x84 0xD5 0xF1 0x30 0x83 0x01 0x01 0xFF
    0x82 0xF1 0xD5 0x70 0x83 0x3B
The second octet is zero at the beginning of the file.

Sblw Fan St Rqs, PID = 0xC1

Richard gets 0x00 in capture "bat-sblw-fan-stat-rqs-off" -> "off" on THHS (no picture)

Vmf Fan Voltage, PID = 0xB5

Richard gets 0x00 and 0x82 to 0xB2 (130 to 178) in capture "bat-vmf-fan-voltage-10v-13v-0v-3-digits" -> "10v-13v-0v-3-digits" on THHS (no picture).

WIn, PID = 0xB9

Richard gets 0x32 (50) in capture "bat-wIn--20.0kW" -> -20.0kW on THHS (no picture)

WOut, PID = 0xBA

Richard gets 0x69 (105) in capture "bat-wOut-21.0kW" -> 21.0kW on THHS (no picture)

Engine ECU, address = 0x10, data rate 10.4 kbit/s

ac-clutch-sig, PID = 0xEF

Richard gets various in capture -> ???? on THHS

cyl1, 2, 3 and 4 PID = 0xE9

cyl1

Richard gets 0x00, 0x00, 0x00, 0x00 in capture -> ???? on THHS

cyl2-4, PID = 0xE9 (should this be three separate items?)

Richard gets 0x00, 0x00, 0x00, 0x00 in capture -> ???? on THHS

etcs-mag-clutch, PID = 0xB3

Richard gets 0x05, 0x00, 0x1F, 0x00, 0x0?, 0x00 in capture -> ???? on THHS

evap-vsv, PID = 0xEF

Richard gets (various) in capture -> ???? on THHS

fuel-pump, PID = 0xEF

Richard gets (various) in capture -> ???? on THHS

ign-advance, PID = 0x0E

Richard gets 0x96 to 0x98 in capture -> (not recorded) on THHS

ignition-cnt, PID = 0xEB

Richard gets (various) in capture -> (not recorded) on THHS

injector, PID = 0xE4

Richard gets 0x0C and 0x21 to 0x25 (12 and 33 to 37) in capture -> 1.5_4.2-4.6ms on THHS

mil-on-run-dist, PID = 0x21

Richard gets 0x00, 0x00 in capture -> (not recorded) on THHS

misfire-load-g_rev, PID = 0xE2

Richard gets 0x00, 0x00 in capture -> (not recorded) on THHS

misfire-rpm, PID = 0xE2

Richard gets 0x00, 0x00 in capture -> (not recorded) on THHS

o2_rl_b1_s2, PID = 0xF2

Richard gets 0x00, 0x00, 0x00, 0x00 in capture -> (not recorded) on THHS

throttle-close-duty, PID = 0xB2

Richard gets various, for example 0x00 0x00 0x8? 0x2? 0x?? 0x00, in capture -> 0% on THHS

throttle-motor-on, PID = 0xB3

Richard gets 0x05 0x00 0x1F 0x00 0x0? 0x00  in capture -> (not recorded) on THHS

throttle-open-duty, PID = 0xB2

Richard gets various, for example 0x00 0x00 0x8? 0x2? 0x08 0x00, in capture -> 8-14% on THHS

Throttle Pos, PID = 0x11

Richard gets 0x28 to 0x30 (40 to 48) in capture -> 18-to-14% on THHS

throttle-pos2, PID = 0xB2

Richard gets (various) in capture -> 2.90_2.76_2.70-2.92v on THHS

throttle-target, PID = 0xB2

Richard gets (various) in capture -> 0.76-0.82v on THHS

vvt-ctrl-b1, PID = 0xEF

Richard gets (various) in capture -> (not recorded) on THHS

Hybrid Vehicle ECU, address = 0x16, data rate 10.4 kbit/s

Acc Sensor Main, PID = 0xD5

Richard gets 0x24 in capture -> 0.70 volts on THHS

Acc Sensor Sub, PID = 0xD5

Richard gets 0x4A/0x4B in capture -> 1.47 volts on THHS

Aux Bat, PID = 0xD8

Richard gets 0xAE (174) in capture -> 13.64 volts on THHS (no picture)

† Mini-Scanner gets this data from the Battery ECU, PID 0xB7.

Cell Temp Max, PID = 0xD6

Richard gets 0x26 (38) in capture -> 38 on THHS (no picture)

Cell Temp Min, PID = 0xD6

Richard gets 0x22 (34) in capture -> 34 on THHS (no picture)

Coolant Temp, PID = 0x05

Richard gets 0x7E (126) in capture -> 86°C on THHS (IMG_0853.JPG)

† Mini-Scanner gets this data from the Engine ECU, PID 0x05.

Dchg Rqsr SoC, PID = 0xCB

Richard gets 0x00, 0x00 in capture "hv-dchg-rqst-soc-0W" -> 0W on THHS (IMG_0862.JPG)

Drive Condition, PID = 0xCC

Richard gets 0x00 in capture -> 0 on THHS (IMG_0862.JPG)

ECU Type HV, PID = 0xFE

Richard gets 0x01 in capture -> unknown on THHS (no picture)

Engine Spd, PID = 0xC7

Richard gets values around 0x05, 0xA0 in capture -> 1440 on THHS (no picture)

† Mini-Scanner gets this data from the Engine ECU.

Intake Air, PID = 0x0F

Richard gets 0x6A in capture -> 66 on THHS (but IMG_0847.JPG shows 62°C)

† Mini-Scanner gets this data from the Engine ECU.

Inverter Temp MG1 and MG2, PID = 0xCD

Inverter Temp MG1

Richard gets 0x6D-0x6E (109-110) in capture -> 59-60 on THHS (but IMG_0862.JPG shows 58°C)

Inverter Temp MG2

Richard gets 0x68-0x81 (104-129) in capture -> 59-79 on THHS (but IMG_0862.JPG shows 55°C)

Mcyl Ctrl Prw, PID = 0xC8

Richard gets 0x00,0x00 to 0xFF,0x84 in capture -> -496 N.m on THHS (no picture)

MG1 Curr V, PID = 0xD0

Richard gets ??? in capture -> ???? on THHS

I have not been able to get steady readings from these items and suspect that they are the instantaneous currents and not rectified and smoothed values.  TO DO - check when MG2 is stalled (stationary car).

MG1 Curr W, PID = 0xD0

Richard gets ??? in capture -> ???? on THHS

MG1 Rev, PID = 0xC4

Richard gets 0x10,0x52 - 0x11,0x43 (4178-4419) in capture -> ~4300 on THHS (no picture)

MG1 Trq, PID = 0xC4

Richard gets 0xFF,0xDB - 0xFF,0xEB (-37  to -21) in capture -> ~-4.00 N.m on THHS (no picture)

MG2 Curr V, PID = 0xCF

Richard gets ??? in capture -> ???? on THHS

MG2 Curr W, PID = 0xCF

Richard gets ??? in capture -> ???? on THHS

MG2 Rev, PID = 0xC2

Richard gets 0xFF,0xFE - 0x00,0x02 (-1 to +2) in capture -> ±2 r.p.m. on THHS (no picture)

MG2 Trq, PID = 0xC2

Richard gets 0xFF,0x98 - 0xFF,0xCC (-104  to -52) in capture -> ~-10.00 N.m on THHS (no picture)

Power Rqst, PID = 0xC5

Richard gets 0x01, 0x0C (268) in capture -> 2680W on THHS (no picture ???)

Pwr Resource IB, PID = 0xD2

Richard gets 0x00,0x00 to 0x00,0x03 in capture -> 0 to 6A on THHS

So, why 16 bits?  Is first octet used for something else?

Power Resource VM, PID = 0xD1

Richard gets 0x98 to 0x9B in capture -> 304 to 306V on THHS

Regen Exec Trq, PID = 0xC3

Richard gets 0x00 in capture -> 0.00 N.m on THHS

Regen Rqst Trq, PID = 0xC3

Richard gets 0x00 in capture -> 0.00 N.m on THHS

Shift Sensor 1, PID = 0xD4

Richard gets 0x01 in capture -> prndbu? on THHS

This item has been supported and documented since Mini-Scanner firmware version 0.10.

Shift Sensor 2, PID = 0xD3

Richard did not capture, but this item has been supported since Mini-Scanner firmware version 0.10.  Of course, I don't know that the offset and scaling are correct, especially since the accelerator pedal sensors apparently have an offset of 1, so you need to subtract one before dividing by 50.

SoC, PID = 0xC9

Richard gets 0x90 to 0x8F in capture "hv-soc-56.05" -> 56.05 on THHS.

† Mini-Scanner gets this data from the Battery ECU and divides by 2.

Tachometer, PID = 0x

Richard did not capture.

Target Engine Spd, PID = 0xC6

Richard gets up to 0x07, 0x4B in capture -> ~1700 r.p.m. on THHS

Temp MG1, PID = 0xCE

Richard gets 0x6C (108) in capture -> 58 on THHS (but IMG_0862.JPG shows 60°C)

Temp MG2, PID = 0xCE

Richard gets 0x6C-0x6D (108-109) in capture -> 58-59 on THHS (but IMG_0862.JPG shows 57°C)

Vehicle Speed, PID = 0xD7

Richard gets 0xFF to 0x00 in capture -> -1 to 0 m.p.h. on THHS (IMG_0847.JPG)

† Mini-Scanner gets this data in km/hr using PID 0x0D.

WIn Ctrl Pwr, PID = 0xCA

Richard gets 0x83 in capture -> 20000W on THHS (no picture)

WOut Ctrl Pwr, PID = 0xCA

Richard gets 0x83 in capture -> 20960W on THHS (no picture)

XTest Sw Sig, PID = 0xEC

Richard gets 0x00 in capture -> "normal" on THHS (no picture)