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DTC U0073, U1900, U2516

BHE090255430W05

DTC | U0073 | CAN system communication error
--- | --- | ---
U1900
U2516 | CAN system wiring harness open or 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, TCM, DSC HU/CM, EPS control module, keyless unit and instrument cluster • PCM malfunction • EPS control module malfunction • Keyless unit malfunction • TCM malfunction • DSC HU/CM malfunction • Instrument cluster malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | DETERMINING LOCATION OF A MALFUNCTION • Determine malfunctioning part of CAN system. (See PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION) • Is malfunctioning part wiring harness 10 (instrument panel harness) or instrument cluster? | Yes | Go to Step 11.
No | Go to the next step.
2 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 9 (instrument panel harness) or steering angle sensor? | Yes | Go to Step 21.
No | Go to the next step.
3 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 8 (instrument panel harness)? | Yes | Go to Step 25.
No | Go to the next step.
4 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 7 (rear harness) or keyless unit? | Yes | Go to Step 23.
No | Go to the next step.
5 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 6 (rear harness)? | Yes | Go to Step 27.
No | Go to the next step.
6 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 5 (front harness) or DSC HU/CM? | Yes | Go to Step 19.
No | Go to the next step.
7 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 3 (front harness)? | Yes | Go to Step 29.
No | Go to the next step.
8 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 4 (front harness) or the TCM? | Yes | Go to Step 31.
No | Go to the next step.
9 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 2 (front harness) or EPS control module? | Yes | Go to Step 33.
No | Go to the next step.
10 | DETERMINING LOCATION OF A MALFUNCTION • Is malfunctioning part wiring harness 1 (front harness) or PCM? | Yes | Go to Step 35.
No | Troubleshooting completed.
11 | INSPECT INSTRUMENT CLUSTER CONNECTOR • Disconnect negative battery cable. • Disconnect instrument cluster connector. • Is instrument cluster connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
12 | • Is inspected vehicle AT? | Yes | Go to the next step.
No | Go to Step 14.
13 | INSPECT WIRING HARNESS BETWEEN TCM AND INSTRUMENT CLUSTER • Disconnect TCM connector. • Inspect following wiring harness between TCM and instrument cluster terminals for short to ground, short power supply, and open circuit: – 1Y-1L (CAN_L) – 1V-1J (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
14 | 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: – I-1L (CAN_L) – H-1J (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
15 | INSPECT WIRING HARNESS BETWEEN PCM AND INSTRUMENT CLUSTER • Disconnect PCM connector. • Inspect following wiring harness between PCM and instrument cluster terminals for short to ground, short power supply, and open circuit: – 4S-1L (CAN_L) – 4V-1J (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
16 | INSPECT WIRING HARNESS BETWEEN STEERING ANGLE SENSOR AND INSTRUMENT CLUSTER • Disconnect steering angle sensor connector. • Inspect following wiring harness between steering angle sensor and instrument cluster terminals for short to ground, short power supply, and open circuit: – F-1L (CAN_L) – E-1J (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
17 | INSPECT WIRING HARNESS BETWEEN EPS CONTROL MODULE AND INSTRUMENT CLUSTER • Disconnect EPS control module connector. • Inspect following wiring harness between EPS control module and instrument cluster terminals for short to ground, short power supply, and open circuit: – 2K-1L (CAN_L) – 2M-1J (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
18 | INSPECT WIRING HARNESS BETWEEN KEYLESS UNIT AND INSTRUMENT CLUSTER • Disconnect keyless unit connector. • Inspect following wiring harness between keyless unit and instrument cluster terminals for short to ground, short power supply, and open circuit: – 3B-1L (CAN_L) – 3A-1J (CAN_H) • Is wiring harness normal? | Yes | Replace instrument cluster, then go to Step 37.
No | Replace wiring harness.
19 | INSPECT DSC HU/CM CONNECTOR • Disconnect negative battery cable. • Disconnect DSC HU/CM connector. • Is DSC HU/CM connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
20 | 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: – I-1L (CAN_L) – H-1J (CAN_H) • Is wiring harness normal? | Yes | Replace DSC HU/CM, then go to Step 37.
No | Replace wiring harness.
21 | INSPECT STEERING ANGLE SENSOR CONNECTOR • Disconnect negative battery cable. • Disconnect steering angle sensor connector. • Is steering angle sensor connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
22 | INSPECT WIRING HARNESS BETWEEN STEERING ANGLE SENSOR AND INSTRUMENT CLUSTER • Disconnect instrument cluster connector. • Inspect following wiring harness between steering angle sensor and instrument cluster terminals for short to ground, short power supply, and open circuit: – F-1L (CAN_L) – E-1J (CAN_H) • Is wiring harness normal? | Yes | Replace steering angle sensor, then go to Step 37.
No | Replace wiring harness.
23 | INSPECT KEYLESS UNIT CONNECTOR • Disconnect negative battery cable. • Disconnect keyless unit connector. • Is keyless unit connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
24 | INSPECT WIRING HARNESS BETWEEN KEYLESS UNIT AND INSTRUMENT CLUSTER • Disconnect instrument cluster connector. • Inspect following wiring harness between keyless unit and instrument cluster terminals for short to ground, short power supply, and open circuit: – 3B-1L (CAN_L) – 3A-1J (CAN_H) • Is wiring harness normal? | Yes | Replace keyless unit, then go to Step 37.
No | Replace wiring harness.
25 | INSPECT WIRING HARNESS BETWEEN KEYLESS UNIT AND STEERING ANGLE SENSOR • Disconnect negative battery cable. • Disconnect keyless unit connector. • Disconnect steering angle sensor connector. • Inspect following wiring harness between keyless unit and steering angle sensor terminals for short to ground, short power supply, and open circuit: – 3B-F (CAN_L) – 3A-E (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
26 | INSPECT WIRING HARNESS BETWEEN KEYLESS UNIT AND INSTRUMENT CLUSTER • Disconnect negative battery cable. • Disconnect keyless unit connector. • Disconnect instrument cluster connector. • Inspect following wiring harness between keyless unit and instrument cluster terminals for short to ground, short power supply, and open circuit: – 3B-1L (CAN_L) – 3A-1J (CAN_H) • Is wiring harness normal? | Yes | Go to Step 37.
No | Replace wiring harness.
27 | INSPECT WIRING HARNESS BETWEEN DSC HU/CM AND KEYLESS UNIT • Disconnect negative battery cable. • Disconnect DSC HU/CM connector. • Disconnect keyless unit connector. • Inspect following wiring harness between DSC HU/CM and keyless unit terminals for short to ground, short power supply, and open circuit: – I-3B (CAN_L) – H-3A (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
28 | INSPECT WIRING HARNESS BETWEEN DSC HU/CM AND INSTRUMENT CLUSTER • Disconnect negative battery cable. • Disconnect DSC HU/CM connector. • 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: – I-1L (CAN_L) – H-1J (CAN_H) • Is wiring harness normal? | Yes | Go to Step 37.
No | Replace wiring harness.
29 | INSPECT WIRING HARNESS BETWEEN EPS CONTROL MODULE AND DSC HU/CM • Disconnect negative battery cable. • Disconnect EPS control module connector. • Disconnect DSC HU/CM connector. • Inspect following wiring harness between EPS control module and DSC HU/CM terminals for short to ground, short power supply, and open circuit: – 2K-I (CAN_L) – 2M-H (CAN_H) • Is wiring harness normal? | Yes | Go to the next step
No | Replace wiring harness.
30 | INSPECT WIRING HARNESS BETWEEN PCM AND DSC HU/CM • Disconnect negative battery cable. • Disconnect PCM connector. • 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: – 4S-I (CAN_L) – 4V-H (CAN_H) • Is wiring harness normal? | Yes | Go to Step 37.
No | Replace wiring harness.
31 | INSPECT TCM CONNECTOR • Disconnect negative battery cable. • Disconnect TCM connector. • Is TCM connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
32 | INSPECT WIRING HARNESS BETWEEN TCM AND INSTRUMENT CLUSTER • Disconnect instrument cluster connector. • Inspect following wiring harness between TCM and instrument cluster terminals for short to ground, short power supply, and open circuit: – 1Y-1L (CAN_L) – 1V-1J (CAN_H) • Is wiring harness normal? | Yes | Replace TCM, then go to Step 37.
No | Replace wiring harness.
33 | INSPECT EPS CONTROL MODULE CONNECTOR • Disconnect negative battery cable. • Disconnect EPS control module connector. • Is EPS control module connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
34 | INSPECT WIRING HARNESS BETWEEN EPS CONTROL MODULE AND INSTRUMENT CLUSTER • Disconnect instrument cluster connector. • Inspect following wiring harness between EPS control module and instrument cluster terminals for short to ground, short power supply, and open circuit: – 2K-1L (CAN_L) – 2M-1J (CAN_H) • Is wiring harness normal? | Yes | Replace EPS control module, then go to Step 37.
No | Replace wiring harness.
35 | INSPECT PCM CONNECTOR • Disconnect negative battery cable. • Disconnect PCM connector. • Is PCM connector normal? | Yes | Go to the next step.
No | Replace wiring harness.
36 | INSPECT WIRING HARNESS BETWEEN PCM AND INSTRUMENT CLUSTER • Disconnect PCM connector. • Inspect following wiring harness between PCM and instrument cluster terminals for short to ground, short power supply, and open circuit: – 4S-1L (CAN_L) – 4V-1J (CAN_H) • Is wiring harness normal? | Yes | Replace PCM, then go to the next step.
No | Replace wiring harness.
37 | CHECK DTC INDICATE • Connect PCM connector. • Connect EPS control module connector. • Connect TCM connector. • Connect DSC HU/CM connector. • Connect keyless unit connector. • Connect steering angle sensor 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.