Tesla Model S/X DC/DC Converter - Revision history

Asavage at 19:02, 22 April 2026

2026-04-22T19:02:19Z

← Older revision		Revision as of 19:02, 22 April 2026
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	The Tesla Model S/X '''GEN2''' DC-DC Converter is a popular candidate for EV conversions. It was first available in the Model S around Jan2014, and later in the Model X. It is located in the frunk area near the cowl.		The Tesla Model S/X '''GEN2''' DC-DC Converter is a popular candidate for EV conversions. It was first available in the Model S around Jan2014, and later in the Model X. It is located in the frunk area near the cowl.

	It is not to be confused with the earlier '''GEN1''' DC-DC Converter, whose casing was of a kidney-shape, was located in the RF fenderwell against the firewall, and it incorporated functions of the [[Tesla Model S Front HVJB\|front HVJB]]; it contains fuses for the coolant heater, cabin heater, and air-~~condition~~ compressor, and servicing these fuses was never supported by Tesla (though is frequently performed in the aftermarket), so it developed a reputation for being unreliable due to frequent replacement for blown fuses. Though the hardware connections are different between GEN1 & GEN2, they both use the same (5) wired connections with the same functions, and the CAN commands appear to (may be) the same.		It is not to be confused with the earlier '''GEN1''' DC-DC Converter, whose casing was of a kidney-shape, was located in the RF fenderwell against the firewall, and it incorporated functions of the [[Tesla Model S Front HVJB\|front HVJB]]; it contains fuses for the coolant heater, cabin heater, and air-conditioning compressor, and servicing these fuses was never supported by Tesla (though is frequently performed in the aftermarket), so it developed a reputation for being unreliable due to frequent replacement for blown fuses. Though the hardware connections are different between GEN1 & GEN2, they both use the same (5) wired connections with the same functions, and the CAN commands appear to (may be) the same.
	<br>		<br>
	Tesla DCDC weighs 3,3kg		Tesla DCDC weighs 3,3kg

Arber333 at 17:46, 30 October 2025

2025-10-30T17:46:48Z

← Older revision		Revision as of 17:46, 30 October 2025
Line 2:		Line 2:
	The Tesla Model S/X '''GEN2''' DC-DC Converter is a popular candidate for EV conversions. It was first available in the Model S around Jan2014, and later in the Model X. It is located in the frunk area near the cowl.		The Tesla Model S/X '''GEN2''' DC-DC Converter is a popular candidate for EV conversions. It was first available in the Model S around Jan2014, and later in the Model X. It is located in the frunk area near the cowl.

	It is not to be confused with the earlier '''GEN1''' DC-DC Converter, whose casing was of a kidney-shape, was located in the RF fenderwell against the firewall, and it incorporated functions of the [[Tesla Model S Front HVJB\|front HVJB]]; it contains fuses for the coolant heater, cabin heater, and air-condition compressor, and servicing these fuses was never supported by Tesla (though is frequently performed in the aftermarket), so it developed a reputation for being unreliable due to frequent replacement for blown fuses. Though the hardware connections are different between GEN1 & GEN2, they both use the same (5) wired connections with the same functions, and the CAN commands appear to (may be) the same.[[File:Tesladcdc.jpg\|thumb\|Tesla Model S GEN2 DC-DC Converter]]		It is not to be confused with the earlier '''GEN1''' DC-DC Converter, whose casing was of a kidney-shape, was located in the RF fenderwell against the firewall, and it incorporated functions of the [[Tesla Model S Front HVJB\|front HVJB]]; it contains fuses for the coolant heater, cabin heater, and air-condition compressor, and servicing these fuses was never supported by Tesla (though is frequently performed in the aftermarket), so it developed a reputation for being unreliable due to frequent replacement for blown fuses. Though the hardware connections are different between GEN1 & GEN2, they both use the same (5) wired connections with the same functions, and the CAN commands appear to (may be) the same.
			<br>
			Tesla DCDC weighs 3,3kg
			<br>
			[[File:Tesladcdc.jpg\|thumb\|Tesla Model S GEN2 DC-DC Converter]]
	==Wiring==		==Wiring==

Tom91: Categories

2024-12-20T16:59:30Z

Collin80: Updated status reporting section to better explain the entire message format

2023-10-24T01:24:52Z

Updated status reporting section to better explain the entire message format

← Older revision		Revision as of 01:24, 24 October 2023
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	The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:		The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:

	*Byte 2 = coolant inlet temp,		* Byte 0 = Status bits (bit 0 = Heater shorted, 1 = Over temperature, 2 = Output under voltage, 3 = Bias Fault, 4 = Input not OK, 5 = Output over voltage, 6 = Output current limited 7 = Heater open circuit)
			* Byte 1 = Status bits (bit 0 = Coolant request, 1 = Current thermal limit, 2 = Output voltage regulation fault, 3 = Calibration factor fault)

			*Byte 2 = coolant inlet temp (0.5C scale, -40 offset)
	*Byte 3 = input power (16 W/bit),		*Byte 3 = input power (16 W/bit),
	*Byte 4 = output current (1 A/bit),		*Byte 4 = output current (1 A/bit),
	*Byte 5 ~~/ 10~~ = output voltage (0.1 V/bit)		*Byte 5 = output voltage (0.1 V/bit)

	Note Status Reporting does not work if HW-EN line is not high.		Note Status Reporting does not work if HW-EN line is not high.

Asavage: /* Status Reporting (0x0210, 0d528) */ Found another DBC reference to 0x210 0d528, which also doesn't match other documentation. This'll need verification someday.

2023-04-01T03:15:24Z

Status Reporting (0x0210, 0d528): Found another DBC reference to 0x210 0d528, which also doesn't match other documentation. This'll need verification someday.

← Older revision		Revision as of 03:15, 1 April 2023
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	DBC ~~for 0x0210 0d'''528'''~~<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=/Samples/tesla_models_rwd.dbc&version=GBmaster</ref> (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):
			DBC example #1<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=/Samples/tesla_models_rwd.dbc&version=GBmaster</ref> for 0x0210 0d'''528''' (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):

	BO_ '''528''' DC_DC_Converter_Status: 7 CAN3		BO_ '''528''' DC_DC_Converter_Status: 7 CAN3
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	CM_ BO_ 528 "DC-DC Converter Status [10Hz]";		CM_ BO_ 528 "DC-DC Converter Status [10Hz]";


			DBC example #2<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=%2FSamples%2Ftesla_models.dbc&version=GBmaster</ref> for 0x0210 0d'''528''' (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):

			BO_ 528 DCDC_statusPartial: 2 ETH

			SG_ DCDC_outputCurrent: 0\|8@1+ (1,0) [0\|0] "A" X

			SG_ DCDC_outputVoltage: 8\|8@1+ (0.1,0) [0\|0] "V" X

	==References==		==References==

Asavage: /* Status Reporting (0x0210, 0d528) */ Added to achieve some indention on DBC example.

2023-04-01T03:09:31Z

Status Reporting (0x0210, 0d528): Added to achieve some indention on DBC example.

← Older revision		Revision as of 03:09, 1 April 2023
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	DBC for 0x0210 0d'''528'''<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=/Samples/tesla_models_rwd.dbc&version=GBmaster</ref> (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):		DBC for 0x0210 0d'''528'''<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=/Samples/tesla_models_rwd.dbc&version=GBmaster</ref> (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):

	BO_ '''528''' DC_DC_Converter_Status: 7 CAN3		BO_ '''528''' DC_DC_Converter_Status: 7 CAN3

	SG_ Inlet_Temperature: 16\|8@1- (0.5,40) [0\|0] "C" TBD		SG_ Inlet_Temperature: 16\|8@1- (0.5,40) [0\|0] "C" TBD

	SG_ Input_Power: 24\|8@1+ (16,0) [0\|0] "W" TBD		SG_ Input_Power: 24\|8@1+ (16,0) [0\|0] "W" TBD

	SG_ Output_Current: 32\|8@1+ (1,0) [0\|0] "A" TBD		SG_ Output_Current: 32\|8@1+ (1,0) [0\|0] "A" TBD

	SG_ Output_Voltage: 40\|8@1+ (0.1,0) [0\|0] "V" TBD		SG_ Output_Voltage: 40\|8@1+ (0.1,0) [0\|0] "V" TBD

	CM_ BO_ 528 "DC-DC Converter Status [10Hz]";		CM_ BO_ 528 "DC-DC Converter Status [10Hz]";

	==References==		==References==

Asavage: /* Status Reporting (0x0210, 0d528) */ Found a DBC that includes 0x0210 0d528 and added the lines for it, though they do not align with other documentation.

2023-04-01T03:03:31Z

Status Reporting (0x0210, 0d528): Found a DBC that includes 0x0210 0d528 and added the lines for it, though they do not align with other documentation.

← Older revision		Revision as of 03:03, 1 April 2023
Line 84:		Line 84:

	[[File:Telsa Model S DC-DC-Converter CAN 01b.png\|alt=Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|thumb\|600x600px\|Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|none]]The "CAN3" above refers to the specific CAN bus on the early Tesla Model S, which had (5) (later, (6)) CAN buses. CAN3 is the Powertrain CAN bus.		[[File:Telsa Model S DC-DC-Converter CAN 01b.png\|alt=Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|thumb\|600x600px\|Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|none]]The "CAN3" above refers to the specific CAN bus on the early Tesla Model S, which had (5) (later, (6)) CAN buses. CAN3 is the Powertrain CAN bus.


			DBC for 0x0210 0d'''528'''<ref>https://brianman.visualstudio.com/DBCTools/_git/DBCTools?path=/Samples/tesla_models_rwd.dbc&version=GBmaster</ref> (unverified, possibly wrong or incomplete as it does not match above, but firmware revisions change items frequently):

			BO_ '''528''' DC_DC_Converter_Status: 7 CAN3

			SG_ Inlet_Temperature: 16\|8@1- (0.5,40) [0\|0] "C" TBD

			SG_ Input_Power: 24\|8@1+ (16,0) [0\|0] "W" TBD

			SG_ Output_Current: 32\|8@1+ (1,0) [0\|0] "A" TBD

			SG_ Output_Voltage: 40\|8@1+ (0.1,0) [0\|0] "V" TBD

			CM_ BO_ 528 "DC-DC Converter Status [10Hz]";

	==References==		==References==

Asavage: /* CAN */ Added 0d (decimal) equivalents for the 0x MsgIDs, plus a brief explanation of where the 0d equivalent might be needed. Possibly useful if someone is using a search feature on the 0d vs 0h equivalent.

2023-04-01T01:23:27Z

CAN: Added 0d (decimal) equivalents for the 0x MsgIDs, plus a brief explanation of where the 0d equivalent might be needed. Possibly useful if someone is using a search feature on the 0d vs 0h equivalent.

← Older revision		Revision as of 01:23, 1 April 2023
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	=== CAN ===		=== CAN ===
	Two CAN MsgIDs are documented for this unit:		Two CAN MsgIDs are documented for this unit. When working with CAN, in some contexts, you need to know the hex (0x) or the decimal (0d) equivalent, eg DBC files and some CAN software requires 0d format, so both are given below:

	* 0x03D8 : Input: Commands to the unit (3 bytes)		* 0x03D8 (0d984) : Input: Commands to the unit (3 bytes)
	* 0x0210 : Output: Status Reporting from the unit (7 bytes)		* 0x0210 (0d528) : Output: Status Reporting from the unit (7 bytes)

	==== Commands (0x03D8) ====		==== Commands (0x03D8, 0d984) ====
	This CAN command payload is 3 bytes, and must be sent at 500ms intervals.		This CAN command payload is 3 bytes, and must be sent at 500ms intervals.

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	==== Status Reporting (0x0210)====		==== Status Reporting (0x0210, 0d528)====
	The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:		The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:

Asavage: /* Example */ Added a bit of color to the hex examples, to highlight the line-to-line transformation differences.

2023-04-01T00:28:24Z

Example: Added a bit of color to the hex examples, to highlight the line-to-line transformation differences.

← Older revision		Revision as of 00:28, 1 April 2023
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	* Subtract constant 9 from 14.4v = 5.4		* Subtract constant 9 from 14.4v = 5.4
	* Multiply 5.4 by constant 146 = 788.4		* Multiply 5.4 by constant 146 = 788.4
	* Convert 788.4 to hex = 0x0315 (expressed as individual bytes: 0x03 0x15)		* Convert 788.4 to hex = 0x0315 (expressed as individual bytes: <u><span style="color:red">0x03</span> <span style="color:blue">0x15</span></u>)
	* Convert to little-endian format = 0x15 0x03		*Convert to little-endian format = <u><span style="color:blue">0x15</span> <span style="color:red">0x03</span></u>
	* Add 4 to the second byte, to enable DC output = 0x15 ~~0x07~~		*Add 4 to the second byte, to enable DC output = <u>0x15 0x0<span style="color:red">7</span></u>
	* Pad with zero byte to assemble the required 3-byte payload: 0x15 0x07 0x00		*Pad with zero byte to assemble the required 3-byte payload: <u>0x15 0x07 <span style="color:red">0x00</span></u>
	* Prefix with the command MsgID 0x3D8 : '''0x03D8 0x15 0x07 0x00'''		*Prefix with the command MsgID 0x3D8 : '''<u>0x03D8 0x15 0x07 0x00</u>'''
	* Send the MsgID + data payload		* Send the MsgID + data payload

	==== Status Reporting (0x0210) ====
			==== Status Reporting (0x0210)====
	The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:		The data is comprised of 7 bytes, which is transmitted at 100ms (10Hz) intervals:

	* Byte 2 = coolant inlet temp,		*Byte 2 = coolant inlet temp,
	* Byte 3 = input power (16 W/bit),		*Byte 3 = input power (16 W/bit),
	* Byte 4 = output current (1 A/bit),		*Byte 4 = output current (1 A/bit),
	* Byte 5 / 10 = output voltage (0.1 V/bit)		*Byte 5 / 10 = output voltage (0.1 V/bit)

	Note Status Reporting does not work if HW-EN line is not high.		Note Status Reporting does not work if HW-EN line is not high.
Line 84:		Line 85:
	[[File:Telsa Model S DC-DC-Converter CAN 01b.png\|alt=Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|thumb\|600x600px\|Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|none]]The "CAN3" above refers to the specific CAN bus on the early Tesla Model S, which had (5) (later, (6)) CAN buses. CAN3 is the Powertrain CAN bus.		[[File:Telsa Model S DC-DC-Converter CAN 01b.png\|alt=Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|thumb\|600x600px\|Tesla Model S DC-DC Converter CAN information by Jason Hughes, (wk057), Jan2016.\|none]]The "CAN3" above refers to the specific CAN bus on the early Tesla Model S, which had (5) (later, (6)) CAN buses. CAN3 is the Powertrain CAN bus.

	== References ==		==References==
	[[Category:OEM]]		[[Category:OEM]]
	[[Category:Tesla]]		[[Category:Tesla]]
	[[Category:DC/DC]]		[[Category:DC/DC]]
			<references />

Asavage: /* HV */ Removed some extraneous boldface.

2023-04-01T00:19:23Z

HV: Removed some extraneous boldface.

← Older revision		Revision as of 00:19, 1 April 2023
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	~~'''~~Donor Harness:~~'''~~ Tesla OE/OEM Part Number: 1032804-00-A has two Blue DC-DC plugs.		Donor Harness: Tesla OE/OEM Part Number: 1032804-00-A has two Blue DC-DC plugs.
	[[File:PXL 20210514 092652934-min.jpg\|alt=Pinout for LV connector is written on the board\|thumb\|Pinout for LV connector is printed on the board.]]		[[File:PXL 20210514 092652934-min.jpg\|alt=Pinout for LV connector is written on the board\|thumb\|Pinout for LV connector is printed on the board.]]

← Older revision		Revision as of 16:59, 20 December 2024
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	==References==		==References==
	~~[[Category:OEM]]~~
	[[Category:Tesla]]		[[Category:Tesla]]
	[[Category:DC/DC]]		[[Category:DC/DC]]
	<references />		<references />