DTC U0073, U1900, U2516

id0902e6902600

DTC

U0073

CAN system communication error

U1900

U2516

CAN system wiring harness open and short circuit

DETECTION CONDITION

Warning
• Detection conditions are for understanding DTC outline before performing inspection. Performing inspection with only detection conditions may cause injury due to operating error or damage the system. When performing inspection, always follow inspection procedure.
• CAN system related harness malfunction
• Related module communication error

POSSIBLE CAUSE

• Open or short circuit in wiring harness
• Malfunction of connectors between PCM, ABS (ABS/TCS) HU/CM or DSC HU/CM and Instrument cluster
• PCM malfunction
• ABS (ABS/TCS) HU/CM malfunction (with ABS (ABS/TCS))
• DSC HU/CM malfunction (with DSC)
• Instrument cluster malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
DETERMINING THE LOCATION OF A MALFUNCTION
• Determine the malfunctioning part of the CAN system.
• Is the malfunctioning part the wiring harness C or the instrument cluster?
Yes
Go to Step 4.
No
Go to next step.
2
DETERMINING THE LOCATION OF A MALFUNCTION
• Is the malfunctioning part the wiring harness B or the ABS (ABS/TCS) HU/CM? (with ABS (ABS/TCS))
• Is the malfunctioning part the wiring harness B or the DSC HU/CM? (with DSC)
Yes
Go to Step 8.
No
Go to next step.
3
DETERMINING THE LOCATION OF A MALFUNCTION
• Is the malfunctioning part the wiring harness A or the PCM?
Yes
Go to Step 12.
No
Troubleshooting completed.
4
INSPECT INSTRUMENT CLUSTER CONNECTOR
• Disconnect negative battery cable.
• Disconnect instrument cluster connector.
• Is poor connection detection bars of instrument cluster connector okay?
Yes
Go to next step.
No
Replace wiring harness.
5
• Is vehicle equipped with DSC?
Yes
Go to next step.
No
Go to Step 7.
6
INSPECT WIRING HARNESS BETWEEN DSC HU/CM AND INSTRUMENT CLUSTER
• Disconnect DSC HU/CM connector.
• Inspect following wiring harness between DSC HU/CM and instrument cluster terminals for short to ground, short power supply, and open circuit:
- AF-2W (CAN_L)
- AG-2X (CAN_H)
• Is wiring harness okay?
Yes
Replace instrument cluster, then go to Step 16.
No
Replace wiring harness.
7
INSPECT WIRING HARNESS BETWEEN ABS (ABS/TCS) HU/CM AND INSTRUMENT CLUSTER
• Disconnect ABS (ABS/TCS) HU/CM connector.
• Inspect following wiring harness between ABS (ABS/TCS) HU/CM and instrument cluster terminals for short to ground, short power supply, and open circuit:
- R-2W (CAN_L)
- O-2X (CAN_H)
• Is wiring harness okay?
Yes
Replace instrument cluster, then go to Step 16.
No
Replace wiring harness.
8
INSPECT ABS (ABS/TCS) HU/CM OR DSC HU/CM CONNECTOR
• Disconnect negative battery cable.
• Disconnect ABS (ABS/TCS) HU/CM or DSC HU/CM connector.
• Is poor connection detection bars of ABS (ABS/TCS) HU/CM or DSC HU/CM connector okay?
Yes
Go to next step.
No
Replace wiring harness.
9
• Is vehicle equipped with DSC?
Yes
Go to next step.
No
Go to Step 11.
10
INSPECT WIRING HARNESS BETWEEN DSC HU/CM AND INSTRUMENT CLUSTER
• Disconnect instrument cluster connector.
• Inspect following wiring harness between DSC HU/CM and instrument cluster terminals for short to ground, short power supply, and open circuit:
- AF-2W (CAN_L)
- AG-2X (CAN_H)
• Is wiring harness okay?
Yes
Replace DSC HU/CM, then go to Step 16.
No
Replace wiring harness.
11
INSPECT WIRING HARNESS BETWEEN ABS (ABS/TCS) HU/CM AND INSTRUMENT CLUSTER
• Disconnect instrument cluster connector.
• Inspect following wiring harness between ABS (ABS/TCS) HU/CM and instrument cluster terminals for short to ground, short power supply, and open circuit:
- R-2W (CAN_L)
- O-2X (CAN_H)
• Is wiring harness okay?
Yes
Replace ABS (ABS/TCS) HU/CM, then go to Step 16.
No
Replace wiring harness.
12
INSPECT PCM CONNECTOR
• Disconnect negative battery cable.
• Disconnect PCM connector.
• Is poor connection detection bars of PCM connector okay?
Yes
Go to next step.
No
Replace wiring harness.
13
• Is vehicle equipped with DSC?
Yes
Go to next step.
No
Go to Step 15.
14
INSPECT WIRING HARNESS BETWEEN PCM AND DSC HU/CM
• Disconnect negative battery cable.
• Disconnect DSC HU/CM connector.
• Inspect following wiring harness between PCM and DSC HU/CM terminals for short to ground, short power supply, and open circuit:
- 2R-AF (CAN_L)
- 2U-AG (CAN_H)
• Is wiring harness okay?
Yes
Replace PCM, then go to Step 16.
No
Replace wiring harness.
15
INSPECT WIRING HARNESS BETWEEN PCM AND ABS (ABS/TCS) HU/CM
• Disconnect negative battery cable.
• Disconnect ABS (ABS/TCS) HU/CM connector.
• Inspect following wiring harness between PCM and ABS (ABS/TCS) HU/CM terminals for short to ground, short power supply, and open circuit:
- 2R-R (CAN_L)
- 2U-O (CAN_H)
• Is wiring harness okay?
Yes
Replace PCM, then go to next step.
No
Replace wiring harness.
16
CHECK DTC INDICATE
• Connect PCM connector.
• Connect ABS (ABS/TCS) HU/CM or DSC HU/CM connector.
• Connect instrument cluster connector.
• Clear DTC from module memory using SST (WDS or equivalent).
• Perform KOEO/KOER self-test.
• Are DTCs U0073, U1900 and/or U2516 indicated?
Yes
Repeat from Step 1.
No
Troubleshooting completed.