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DTC › ESTA1 ESTA1 / 020C

Open load on degradation latch solenoid (DLS).

â–¶ How to fix

Check wiring and connectors between the ESTA::ECU (E1003) and ESTA::CVU::DLS (V1001). The battery should be disconnected during measurements. 1. Check connnectors: - Disconnect harness connectors on both ECU side, and DLS side. - Visually check connectors for defects connecting E1003 and V1001. 2. Check solenoid: - Disconnect harness connector on both ECU side, and DLS side. - Measure the resistance on the solenoid component between pins V1001::1 and V1001::2. - Should be 6.3 ohm at +20°C - If resistance infinite replace solenoid. 3. Check Wiring - Disconnect harness connector on both ECU side, and DLS side. - Check cable harness for defects. - Measure the resistance in the cable between pins E1003::A16 and V1001::1. It should be approximately 0 ohm. - Measure the resistance in the cable between pins E1003::A18 and V1001::2. It should be approximately 0 ohm. 4. Check output from ESTA::ECU::E1003 - Disconnect harness connector on both ECU side, and DLS side. - Connect battery turn ignition ON. - Meassure voltage from E1003 output over pins E1003::A16 and E1003::A18. Small detectable diagnostic voltage level in off state should be present Verify that the issue is solved by performing a Diagnostic SelfTest (requires Parking Brake to be applied) - If the root cause fault has been fixed, this DTC will be set passive.

What you'll see

Only if system starts/restarted the degradation mode will be entrered.

System reaction

Red Steer tag axle fault warn ESTA in released or fixed mode

Diagnostic depth

Detection

Electric connection to solenoid lost.

Possible cause

* Wiring - Connecting cables are broken * Connectors - Connector on DLS defect - Connector on ESTA defect * Solenoid - defect

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