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DTC U0073, U1900, U2516

id0902e6902600

DTC | U0073 | CAN system communication error
--- | --- | ---
U1900
U2516 | CAN system wiring harness open or short circuit
DETECTION CONDITION | Warning • Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection with only detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. • CAN system related wiring harness malfunction • CAN system related module communication error
POSSIBLE CAUSE | • Open or short circuit in the wiring harness • Connector malfunction • PCM malfunction • ABS HU/CM malfunction (Vehicles without the ABS) • Instrument cluster malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | DETERMINING LOCATION OF A MALFUNCTION • Determine the malfunctioning part of the CAN system. (See PROCEDURES FOR DETERMINING THE LOCATION OF A MALFUNCTION.) • Is the malfunctioning part wiring harness C or the instrument cluster? | Yes | Go to Step 4.
No | Go to the next step.
2 | DETERMINING LOCATION OF A MALFUNCTION • Is the malfunctioning part wiring harness B or the ABS HU/CM? | Yes | Go to Step 6.
No | Go to the next step.
3 | DETERMINING LOCATION OF A MALFUNCTION • Is the malfunctioning part wiring harness A or the PCM? | Yes | Go to Step 8.
No | Go to the next step.
4 | INSPECT INSTRUMENT CLUSTER CONNECTOR • Disconnect the negative battery cable. • Disconnect the instrument cluster connector. • Is the instrument cluster connector connected correctly? | Yes | Go to the next step.
No | Replace the wiring harness.
5 | INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND INSTRUMENT CLUSTER • Disconnect the ABS HU/CM connector. • Inspect the wiring harnesses between following terminals for the short to ground, short to power supply and open circuit: - ABS HU/CM terminal D and instrument cluster terminal 2W*1 - ABS HU/CM terminal P and instrument cluster terminal 2X*1 - ABS HU/CM terminal L and instrument cluster terminal 2W*2 - ABS HU/CM terminal H and instrument cluster terminal 2X*2 *1: Australian specs (applied VIN (assumed): JM0 DY10Y100 100001-108401), General R.H.D. specs (without WU-TWC) *2: Australian specs (applied VIN (assumed): JM0 DY10Y100 108402-, General R.H.D. specs (with WU-TWC) • Is the wiring harness normal? | Yes | Replace the instrument cluster, then go to Step 10.
No | Replace the wiring harness.
6 | INSPECT ABS HU/CM CONNECTOR • Disconnect the negative battery cable. • Disconnect the ABS HU/CM connector. • Is the ABS HU/CM connector connected correctly? | Yes | Go to the next step.
No | Replace the wiring harness.
7 | INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND INSTRUMENT CLUSTER • Disconnect the instrument cluster connector. • Inspect the wiring harnesses between following terminals for the short to ground, short to power supply and open circuit: - ABS HU/CM terminal D and instrument cluster terminal 2W*1 - ABS HU/CM terminal P and instrument cluster terminal 2X*1 - ABS HU/CM terminal L and instrument cluster terminal 2W*2 - ABS HU/CM terminal H and instrument cluster terminal 2X*2 *1: Australian specs (applied VIN (assumed): JM0 DY10Y100 100001-108401), General R.H.D. specs (without WU-TWC) *2: Australian specs (applied VIN (assumed): JM0 DY10Y100 108402-, General R.H.D. specs (with WU-TWC) • Is the wiring harness normal? | Yes | Replace the ABS HU/CM, then go to Step 10.
No | Replace the wiring harness.
8 | INSPECT PCM CONNECTOR • Disconnect the negative battery cable. • Disconnect the PCM connector. • Is the PCM connector connected correctly? | Yes | Go to the next step.
No | Replace the wiring harness.
9 | INSPECT WIRING HARNESS BETWEEN PCM AND ABS HU/CM • Disconnect the negative battery cable. • Disconnect the ABS HU/CM connector. • Inspect the wiring harnesses between following terminals for the short to ground, short to power supply and open circuit: - PCM terminal 1S and ABS HU/CM terminal D*1 - PCM terminal 1W and ABS HU/CM terminal P*1 - PCM terminal 1S and ABS HU/CM terminal L*2 - PCM terminal 1W and ABS HU/CM terminal H*2 *1: Australian specs (applied VIN (assumed): JM0 DY10Y100 100001-108401), General R.H.D. specs (without WU-TWC) *2: Australian specs (applied VIN (assumed): JM0 DY10Y100 108402-, General R.H.D. specs (with WU-TWC) • Is the wiring harness normal? | Yes | Replace the PCM, then go to the next step.
No | Replace the wiring harness.
10 | CHECK DTC INDICATE • Connect the disconnected module connectors. • Check the display of DTC U0073, U1900, and/or U2516, using the WDS or equivalent. • Are any one or all of the following DTCs displayed? - U0073 - U1900 - U2516 | Yes | Repeat from Step 1.
No | The troubleshooting procedures have been completed.