Mitsubishi Diagnostics PDF Print E-mail


- DataLink Connector

- OBDII Pinout numbers

- 2007+ EvoX / RalliArt / Lancer, etc

- 1995-1997 DSM / 3000GT

- Mitsubishi GALANT

- Mitsubishi Trouble Codes Listing

Where to find the DataLink Connector

The 12pin male connector is only for reflashing/reprogramming the ecu, and is optional if you want to do datalogging.
The 16pin female OBDII connector is for datalogging and reflashing the ecu.

Mitsubishi DataLink Connector

OBDII Mitsubishi pinout:

16 pin OBDII diagnostics connector

OBDII Cable Plug

• Flashing Diagnostic AYC/ACD/EFI/ABS lights, yes it is normal - this is Mitsubishi Factory Diagnostics mode.
Disconnect pin1 to stop the flashing lights permanantly.  (pre 1998 ecus need flashing lights to even start EFI datalogging)
• Yes disconnecting pin9 on the EvoScan Cable with pliers is ecommended for Mitsubishi AYC/ACD usage (pin9 is only used for subaru reflashing)  (the reason for removing pin9 is because Mitsubishi ETACS and AYC/ACD ecus will not datalog until pin9 is removed from the 16pin end of the USB cable.)
• Diagnostic Flashing lights stop flashing when KPH/MPH > 0
• There is also option in the EvoScan Logging menu to "disable flashing lights" when datalogging.

1 EFI/ABS/AYC/ACD  (not used for Evo7+ EFI Diagnostics)  join this pin to Ground (pin4 or 5) with a paper clip to get self diagnosis flashing lights on the dash to read the trouble codes by way of Long (+10s) and short (+1s) flashing lights.
<< Pin1 Very important for mitsubishi diagnostics, ensure this is connected to EFI ECU pin 56 (evo4-8).
2 J1850 (+) line   (not used on Mitsubishi)
3 Suspension - ECS
4 Ground (chassis negative)
5 Ground (chassis negative)
6 Transmission - ELC-4/5AT
7 EFI/ABS/AYC/ACD К-Line (ISO 9141)  
<< Pin7 Very important for diagnostics, ensure this is connected to EFI ECU pin 85(evo9) or pin 62(evo4-8).
9 ETACS: Pulse signal only    (pin9 not needed for Mitsubishi OpenPort)
10 J1850 (-) line  (not used on Mitsubishi)
11 Air Conditioner - Full Auto AC
12 Air Bag – SRS
13 Cruise Control – ASC
14 Rear Diff - AYC (or Vehicle speed signal)
15 L-line (ISO 9141)  (not used on Mitsubishi)
16 Power Supply (+12V)

Mitsubishi 2007+ Diagnostics (EvoX / RalliArt / Lancer, etc):
4 Ground (chassis negative)
5 Ground (chassis negative)
6 CAN Bus High << Important for Diagnostics and Reflashing connection (EFI ECU pin 90)
7 EFI << only used for recovery mode reflashing. no diagnostics on this pin since CAN Bus introduced. (EFI ECU pin 80)
8 Reflash EEPROM Init Voltage (EFI ECU pin 103) << connect OpenPort 2.0 (pin12) direct to EFI Eci pin 103 for recovery mode reflash.
14 CAN Bus Low << Important for Diagnostics and Reflashing connection (EFI ECU pin 91)
16 Power Supply (+12V)

2001+ Mitsubishi 12pin Secondary Diagnostics Connector













21 Traction Control – TCL/4WD
22 Steering - 4WS/ECPS
25 ECU
26 ECU reprogramming (EFI Reflashing)  << Very important for Reflashing, ensure this is connected to EFI ECU pin 100.
27 Transmission ECU programming
32 Adapter identification

Mitsubishi Reflash connector.. note the pin in position 26.


12 pin 1989-1993 Mitsubishi Connector













connect pin 10 to gnd (12) for diagnostics mode

PIN 2 Electronic Power Steering
PIN 3 Active Electronic Control Suspension Output (ECS)
PIN 5 Auto Cruise Control
PIN 6 AT Transmission (ELC-4 A/T Control Unit)
PIN 7 Full Auto A/C (AirCon control unit)
PIN 8 SRS AirBag
PIN 9 ETACS unit
PIN 10 Data (switching input)
PIN 11 Simulated Speed Input (Speed sensor)
PIN 12 Ground (negative)

Logging with Evoscan for 1995-1997 DSM / 3000GT

3000GT Support FORUM:

1. The 1995/96 ECU's use a different address to log knock than the 1997+ ECU's, so you need to make sure that you set the address for "Knocksum" to 3E when logging a 1995 EPROM ECU. Otherwise you will just see a value that changes from 0 to 1.
Very simply, just Right-Click on the Knocksum line, click "Edit", then under "RequestID" change it to 3E, if not already. The correct address for 1997+ ECU's is 26.

2. Jeff at Keydiver doesn't like the formula EvoScan is using for the 4 fueltrim values. Its the same old formula everyone used for 1G fueltrims, which yielded the strange 81-140 values, which don't really tell you anything. Instead, change the old formula 0.78125*x to the new formula: (x/4)-32 for all 4 fueltrims, even though 2G's don't use the HIGH TRIM. This will make the values read true percentages of fuel being added or removed by the fueltrims.

3. For DSM, one of the items maybe incorrectly labeled the MDP Sensor as "EGR Temperature", way down the list. The 2G's don't use an EGRT temperature probe to check the EGR operation, they use the MDP Sensor, which reads in psia. So, Right-Click on the EGR Temperature line, change the formula to x*0.07353-0.0725, change the label to MDP Sensor, the LOGReference to MDPpsia, and the units to psia. This should make the value read correctly up to ~18.7 psia, which is about 4 psi.

4. Be sure you have selected "Hybrid DSM/3000GT/Eclipse" as the protocol.

5. If you are logging a 1995 or 1996 ECU, set the BAUD RATE to 10400. If you try anything faster, the ECU will randomly disconnect and attempt to reconnect
6. The 1995/96 protocol rides on top of the OBDII stuff, so it is VERY slow, only 7-9 samples per second. So, when logging you should only select 1-2 items at a time.

1992- 1995 Mitsubishi Galant / Lancer
All following info has been verified on my Mitsubishi Galant E33A (4G63 SOHC), but it should apply on other pre-OBDII ECUs as well. These apply to 12 pin datalogger EvoSCan USB Cables and also Evoscan 16pin USB Cables 1.3D/1.3R/1.3U
Use the Evoscan DataItem editor to modify requestID numbers as needed for your vehicle:

1990-93 MKI Mitsubishi 3000GT/GTO or Dodge Stealth
1990-94 Eagle Talon, Mitsubishi Eclipse, or Plymouth Laser
1991-92 Galant VR-4
1993 Mitsubishi Lancer GTI 16v
1989-92 Colt, Summit & Mirage (CSM)
1992-95 Mitsubishi Evo I, II & III* (*12-PIN OBDI ONLY)
Many 1990-1995 Mitsubishi vehicles fitted with a 12-PIN OBDI

The protocol is simple: request-reply. Request and reply are one-byte message.
To edit press Ctrl-E in EvoScan Add new items as needed. If the LogReference already exists you will need to edit the existing ones, duplicated logreference items are not permitted.
EvoScan DataItems




Accel Enrichment




Coolant Temp




deg F
Engine Speed




Fuel Trim High




Fuel Trim Low




Fuel Trim Middle




Injector Pulse Width




Oxygen Feedback Trim




Oxygen Sensor




Throttle Position




Air Flow Hz




Air Temperature




deg F
Air Volume








ISC Steps




Knock Sum




Timing Advance








EGR Temperature




deg F



x bit 4

Power Steering



x bit 8

AC Switch



x bit 16




x bit 32

Idle Switch



x bit 128

AC Clutch



x bit 32


Additional Sensors for use with OBDI:
RequestID:       DisplayName:
07    Coolant Temp
0C    Fuel Trim Low (LTFT)
0D    Fuel Trim Middle (LTFT)
0E    Fuel Trim High (LTFT)
0F    Oxygen Feedback Trim (STFT)
12    EGR Temp
13    Oxygen Sensor (Front)
14    Battery Voltage
15    Barometer Pressure
16    Idle Speed Control Position
17    Throttle Position
1A    Mass Air Flow
1D   Accelerator Enrichment
21    Engine RPM
26    Knock Sum
29    Injector Pulse Width
3A    Air Temperature
3E    Oxygen Sensor (Rear)

To run a custom request in Evoscan, press the start logger. during logging you can type a 2 letter custom request code inthe the custom request box at the bottom of the EvoScan main screen. Leave repeat unticked, unless you want to continually run the custom request.

Custom Request






Canister purge

Turn on fuel pump

Disable injector #6

Disable injector #5

Disable injector #4

Disable injector #3

Disable injector #2

Disable injector #1

F1 to F6 only work with engine stopped. After ECU any of theese commands it invokes corresponding relay/solenoid for about 6 seconds. After that it answers in the Response box with 0x00. If engine is running ECU returns 0xFF immediately as completed.
F7 to FC disable injector for about 6 seconds and returns a response of 0x00.
Diagnostic fault codes are stored as bitmaps in two 8-bit cells. There're two kinds: active and stored (accumulated).
You can use the windows calculator in programmer mode (Alt-3) to convert between hex (0x??) numbers (don't need to type the 0x part, just the ?? part) and you can use the calculator to then switch to the 8-bit binary (bin) numbers for trouble code bit analysis.

Also you can use the EvoScan DTC option "MUTII EFI" from the dropdown, and select DisplayDTC and it will do the conversion for you automatically and look up the diagnostic codes.  If your vehicle doesn't support

Custom Request:  CA   will clear the DTS / Diagnostic Trouble Code CEL (check engine light) fault memory.
38 (4C) Faults, low byte
39 (4D) Faults, high byte
3B (4A) Stored faults, low byte
3C (4B) Stored faults, high byte
CA Clear faults, returns 0x00
Bit #CodeFault
1 11 Oxygen sensor
2 12 Intake air flow sensor
3 13 Intake air temperature sensor
4 14 Throttle position sensor
5 15 ISC motor position sensor
6 21 Engine coolant temperature sensor
7 22 Engine speed sensor
8 23 TDC sensor
9 24 Vehicle speed sensor
10 25 Barometric pressure sensor
11 31 Knock sensor
12 41 Injector circuit
13 42 Fuel pump relay
14 43 EGR
15 44 Ignition coil
16 36 Ignition circuit

Mitsubishi Trouble Code Info

96 & later are OBD2 systems and require a scanner.

Accessing Diagnostic Trouble Codes

  • Turn ignition switch to OFF position
  • Locate Data Link Connector (DLC), next to fuse box.
  • Connect voltmeter positive lead to DLC terminal #1 and Negative lead to terminal #12 (ground).
  • Turn Ignition switch to ON position.
  • codes are read out by 12 volt pulses of voltmeter.
  • A constant repetition of short pulses is normal.
  • Signals will appear on voltmeter a long and short 12 volt pulses.
  • long pulses represent tens
  • short pulses represent ones (4 long pulses and 3 short pulses indicates code 43)


1994+ Mitsubishi Diagnostic Trouble Code Retrieval Without Scan Tool
Connect pin 1 (terminal 1) to ground (ground is pin 4 and/or pin 5) you can use a paper clip. and then count the flashes on the check engine light on the dashboard.

  1. Ground Data Link Connector terminal # 1.  pin4 and pin5 are ground. (so you can connect pin 1 and pin 4 with a paperclip or short wire)

  2. Set the ignition switch to "ON", the Malfunction Indicator (check engine) Lamp will illuminate for a particular duration and a certain number of times.
  3. Clear the trouble codes by disconnecting the vehicle battery negative terminal for 16 seconds or longer.
No Codes--normal
  • The Lamp will illuminate for 0.5 seconds, then stay Off for 0.5 seconds, this pattern will repeat until the ignition is turned OFF.
Code 13
  • The Lamp will illuminate one time for approximately 0.5 second. This will represent one unit of ten. There will be approximately a one second delay and then the Lamp will illuminate three times for approximately 0.2 seconds with 0.2 second delay between deflections. This will represent three units of one.
Code 23
  • The Lamp will illuminate two times for approximately 0.5 second with approximately 0.3 second delay between deflections. This will represent two units of ten. There will be approximately a one second delay and then the Lamp will illuminate three times for approximately 0.2 seconds with 0.2 second delay between deflections. This will represent three units of one..

Clearing Trouble Codes

Diagnostic trouble codes may be cleared by disconnecting the battery ground cable for at least 20 seconds. Reconnect negative battery cable and recheck codes to confirm the repair.

Diagnostic Codes


Without OBD-II
11 Oxygen sensor fault.
12 Airflow sensor fault.
13 Intake air temp sensor fault.
14 Throttle position sensor (TPS) fault.
15 Idle speed control (ISC) motor position sensor fault.
21 Coolant temp sensor fault.
22 Crankshaft position (CKP) sesnor fault.
23 Camshaft position (CMP) sensor fault.
24 Vehicle speed sensor (VSS) fault.
25 Barometric (BARO) pressure sensor fault.
31 Knock sensor fault.
32 MAP sensor faulty.
36 Ignition timing adjustment signal fault.
39 Oxygen (O2) sensor fault.
41 Injector(s) fault
42 Fuel pump fault.
43 EGR fault.
44 Ignition coil (cylinders #1 & #4) fault.
52 Ignition coil (cylinders #2 & #5) fault.
53 Ignition coil (cylinders #3 & #6) fault.
55 Idle air control (IAC) valve position sensor fault.
59 Rear Oxygen (O2) sesnor fault.
61 Transaxle control module torque reduction signal fault.
62 Variable Induction control (VIC) valve position sensor fault.
71 Traction control (TC) vacuum valve solenoid fault.
72 Traction Control (TC) vent valve solenoid fault.
Voltmeter or Test Light
1 Oxygen Sensor.
2 Ignition Signal.
3 Air Flow Sensor.
4 Pressure Sensor.
5 Throttle Position Sensor.
6 Idle Speed Control Motor Position Switch.
7 Engine Coolant Temperature Sensor.
86-88 4 Cyl.
Voltmeter or Test Light
10000 Oxygen Sensor.
01000 Crank Angle Sensor.
11000 Air Flow Sensor.
00100 Atmospheric Pressure Sensor.
10100 Throttle Position Sensor.
01100 Motor Position Sensor.
11100 Engine Coolant Temperature Sensor.
00010 No. 1 Cylinder TDC Sensor.
V6 and 89-95 4 Cyl.
(Exc. 95 Eclipse)
Voltmeter or Test Light
11 Oxygen Sensor.
12 Air Flow Sensor.
13 Intake Air Temperature Sensor.
14 Throttle Position Sensor.
15 Motor Position Sensor.
21 Engine Coolant Temperature Sensor.
22 Crank Angle Sensor.
23 TDC/CMP Sensor.
24 Vehicle Speed Sensor.
26 BARO Sensor.
31 Knock Sensor.
32 Manifold Absolute Pressure Sensor.
36 Ignition Timing Adjustment Signal.
39 Oxygen Sensor.
41 Injector.
42 Fuel Pump.
43 EGR.
44 Ignition Coil, 4 Cylinder.
44 Ignition Coil Power Transistor Unit, V6 Cylinders 1 & 4.
52 Ignition Coil Power Transistor Unit, V6 Cylinders 2 & 5.
53 Ignition Coil Power Transistor Unit, V6 Cylinders 3 & 6.
55 Idle Air Control Valve/Servo Valve Position Sensor.
59 Oxygen Sensor (Rear), 4 Cylinder.
59 Left hand Bank Heated Oxygen Sensor, V6.
61 Cable from Transaxle Control Unit, For Transmission
61 Torque Reduction Signal (A/T).
62 Induction Control Valve Position Sensor (Non Turbo).
69 Right hand Bank Heated Oxygen Sensor.
71 Traction Control Vacuum Solenoid.
72 Traction Control Ventilation Solenoid.


95-98 Eclipse (Non-Turbo) Retrieval Without Scan Tool


  1. Cycle the ignition key On-Off-On-Off-On within 5 seconds.


  1. Count the number of times the malfunction indicator lamp (check engine lamp) on the instrument panel flashes on and off. The number of flashes represents the trouble code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses (approx. 4 seconds) separate individual trouble codes.
  2. Repair the malfunction while referring to the inspection chart for diagnostic trouble codes.
  3. After disconnecting the battery cable from the battery (-) terminal for 10 seconds or more, reconnect the cable.
  4. Start the engine and run it at idle for about 15 minutes after the engine has warmed up.
95-98 Eclipse (Non-Turbo)
Check Engine/Light Scan Tool
11 Intermittent Loss Of Crankshaft Position Sensor.
11 Misfire Adaptive Numerator at Limit.
11 No Crankshaft Reference Signal at PCM.
11 Timing Belt Skipped 1 Tooth or More.
13 No Change In Manifold Absolute Pressure (MAP) From Start To Run.
14 5-Volt Supply Output Too Low.
14 Manifold Absolute Pressure (MAP) Sensor Voltage Too High.
14 Manifold Absolute Pressure (MAP) Sensor Voltage Too Low.
14 No 5 Volts To Manifold Absolute Pressure (MAP) Sensor.
15 No Vehicle Speed Sensor Signal.
16 Knock Sensor No. 1 Circuit.
17 Closed Loop Temperature Not Reached.
17 Engine Is Cold Too Long.
21 Downstream Heated Oxygen Sensor Heater Failure.
21 Downstream Heated Oxygen Sensor Shorted To Voltage.
21 Downstream Heated Oxygen Sensor Stays at Center.
21 Downstream Heated Oxygen Sensor Stays at Center.
21 Downstream Heated Oxygen Sensor Voltage Grounded.
21 Slow Upstream Heated Oxygen Sensor Circuit during Catalyst Monitor.
21 Upstream Heated Oxygen Sensor Heater Failure.
21 Upstream Heated Oxygen Sensor Response.
21 Upstream Heated Oxygen Sensor Shorted To B+.
21 Upstream Heated Oxygen Sensor Stays at Center.
21 Upstream Heated Oxygen Sensor Voltage Grounded.
22 Engine Coolant Temperature Sensor Voltage High.
22 Engine Coolant Temperature Sensor Voltage Low.
23 Intake Air Temperature Sensor Voltage High.
23 Intake Air Temperature Sensor Voltage Low.
24 No 5 Volts To Throttle Position Sensor.
24 Throttle Position Sensor Voltage Disagrees With Manifold Absolute Pressure.
24 Throttle Position Sensor Voltage High.
24 Throttle Position Sensor Voltage Low.
25 Idle Air Control Motor Circuits.
25 Target Idle Not Reached (plus or minus 200 RPM).
27 Injector No. 1 Control Circuit.
27 Injector No. 2 Control Circuit.
27 Injector No. 3 Control Circuit.
27 Injector No. 4 Control Circuit.
31 EVAP Leak Monitor Pinched Hose found.
31 EVAP Purge Flow Monitor Failure.
31 EVAP Solenoid Circuit.
31 EVAP Solenoid Switch or Mechanical Fault.
31 EVAP System Large Leak.
31 EVAP System Small Leak.
31 EVAP Vent Solenoid Circuit.
31 Engine Coolant Temp sensor voltage too high.
32 EGR Solenoid Circuit.
32 EGR System Failure.
33 A/C Clutch Relay Circuit.
35 High Speed Fan Control Relay Circuit.
35 High Speed Radiator Fan Relay Circuit.
35 Low Speed Fan Control Relay Circuit.
36 PAIR Solenoid Circuit - M/T.
36 Too Little or Too Much Secondary Air.
37 Park/Neutral Position Switch Failure.
41 Alternator Field Not Switching Properly.
42 Fuel Level Sensing Unit Voltage Too High.
42 Fuel Level Sensing Unit Voltage Too Low.
42 Fuel Level Unit No Change Over Miles.
42 Fuel Pump Relay Control Circuit.
42 MFI (ASID) Relay Control Circuit.
42 No MFI (ASD) Relay Output Voltage at PCM.
43 Cylinder No. 1 Misfire.
43 Cylinder No. 2 Misfire.
43 Cylinder No. 3 Misfire.
43 Cylinder No. 4 Misfire.
43 Ignition Coil No. 1 Primary Circuit.
43 Ignition Coil No. 2 Primary Circuit.
43 Multiple Cylinder Misfire.
44 Battery Temperature Sensor Voltage Too High.
44 Battery Temperature Sensor Voltage Too Low.
44 Battery Temperature Voltage out of limit.
45 EATX Controller Trouble Code Present.
46 Charging System Voltage Too High.
47 Charging System Voltage Too Low.
51 Fuel System Lean.
52 Fuel System Rich.
53 Internal Controller Failure.
53 PCM Failure - Serial Peripheral Interface Communications.
54 No Cam Signal at PCM.
61 BARO Pressure Out Of Range.
62 PCM Failure - Service Reminder Indicator Mile Not Stored.
63 PCM Failure - EEPROM Write Denied.
64 Catalytic Converter Efficiency Failure.
65 Power Steering Pressure Switch Failure.
66 No CCD Messages From TCM - A/T.
95 Eclipse (Turbo)
96-98 Vehicles
P0100 Volume Air Flow circuit.
P0105 BARO Pressure circuit.
P0110 Intake Air Temperature circuit.
P0115 Engine Coolant Temperature circuit.
P0120 Throttle Position circuit.
P0125 Excessive Time to Enter Closed Loop Fuel Control.
P0130 Heated Oxygen Sensor circuit Bank 1 Sensor 1.
P0135 Heated Oxygen Sensor Heater circuit Bank 1 Sensor 1.
P0136 Heated Oxygen Sensor circuit Bank 1 Sensor.
P0141 Heated Oxygen Sensor Heater circuit Bank 1 Sensor 2.
P0150 Heated Oxygen Sensor circuit Bank 2 Sensor 1.
P0155 Heated Oxygen Sensor Heater circuit Bank 2 Sensor 1.
P0156 Heated Oxygen Sensor circuit Bank 2 Sensor 2.
P0161 Heated Oxygen Sensor Heater circuit Bank 2 Sensor 2.
P0170 Fuel Trim Bank 1.
P0173 Fuel Trim Bank 2.
P0201 Injector circuit - Cylinder 1.
P0202 Injector circuit - Cylinder 2.
P0203 Injector circuit - Cylinder 3.
P0204 Injector circuit - Cylinder 4.
P0205 Injector circuit - Cylinder 5.
P0206 Injector circuit - Cylinder 6.
P0300 Random Misfire Detected.
P0301 Misfire Detected - Cylinder 1.
P0302 Misfire Detected - Cylinder 2.
P0303 Misfire Detected - Cylinder 3.
P0304 Misfire Detected - Cylinder 4.
P0305 Misfire Detected - Cylinder 5.
P0306 Misfire Detected - Cylinder 6.
P0325 Knock Sensor 1 circuit.
P0335 Crankshaft Position Sensor circuit.
P0340 Crankshaft Position Sensor circuit.
P0400 EGR Flow.
P0403 EGR Solenoid.
P0420 Catalytic Efficiency below threshold (Bank 1).
P0421 Warm-Up Catalyst Efficiency below threshold (Bank 1).
P0431 Warm-Up Catalyst Efficiency below threshold (Bank 2).
P0440 EVAP System.
P0442 EVAP System Leak Detected.
P0443 EVAP System Purge Control Valve circuit.
P0446 EVAP System Vent Control.
P0450 EVAP System Pressure Sensor.
P0455 EVAP Control System Leak Detected.
P0500 Vehicle Speed Sensor.
P0505 Idle Control System.
P0510 Closed Throttle Position Switch.
P0551 Power Steering Pressure Sensor circuit Range/Performance.
P0700 Transaxle Control System.
P0705 Transmission Range Sensor circuit (PRNDL - Input).
P0710 Transmission Fluid Temperature Sensor circuit.
P0715 Input/Turbine Speed Sensor circuit.
P0720 Output Speed Sensor circuit.
P0725 Engine Speed Input circuit.
P0740 Torque Converter Clutch System.
P0750 Shift Solenoid "A".
P0755 Shift Solenoid "B".
P0760 Shift Solenoid "C".
P0765 Shift Solenoid "D".
P1103 Turbocharger Wastegate Actuator.
P1104 Turbocharger Wastegate Solenoid.
P1105 Fuel Pressure Solenoid.
P1300 Ignition Timing Adjustment circuit.
P1400 Manifold Differential Pressure Sensor circuit.
P1500 Alternator FR Terminal circuit.
P1600 Serial Communication Link.
P1715 Pulse Generator Assembly.
P1750 Solenoid Assembly.
P1751 A/T Control Relay.
P1791 Engine Coolant Temperature Level Input circuit.
P1795 Throttle Position Input circuit to TCM.
Last Updated on Saturday, 17 May 2014 06:29
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