DTC C1762: Left Rear Position Sensor (Out Of Range)

The ESC receives an analog signal from each suspension position sensor. Range of this signal is .35 to 4.75 volts. If the voltage signal from a sensor is less than .35 or greater than 4.75 volts for at least 1 second in 4 consecutive ignition cycles, a code for the corresponding sensor will be set. If out of range sensor is the drivers rear, DTC C1762 will set. ESC module will then provide shock absorber control based on vehicle speed only, and it will send a message to IPC to display SERVICE RIDE CONTROL message.

1. Perform RTD diagnostic system check. See RTD DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing RTD diagnostic system check, go to next step.
2. Using scan tool, retrieve DTCs. If DTC C1768 is stored, go to appropriate DTC for diagnosis. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table under DIAGNOSIS & TESTING. If DTC C1768 is not stored, go to next step.
3. Turn ignition on. Using scan tool, monitor left rear position sensor voltage. If voltage is 0.35-4.75 volts, go to step  7 . If voltage is not 0.35-4.75 volts, go to next step.
4. Visually inspect left rear position sensor for bent arm or bracket, disconnect sensor link or other signs of damage. Repair or replace as necessary. After repairs, go to step  13 . If no damage is found, go to next step.
5. Turn ignition off. Disconnect position sensor 3-pin connector. Turn ignition on. Measure voltage between position sensor harness connector Red/Black and Light Green/Black wires. If voltage is 7.0-8.5 volts, leave connector disconnected and go to next step. If voltage is not 7.0-8.5 volts, go to step  10 .
6. Using scan tool, monitor left rear position sensor voltage. Connect fused jumper wire between position sensor harness connector Red/Black and Light Green/White wires. Note voltage with jumper wire connected. Disconnect jumper wire. If voltage is 4.0-5.5 volts with jumper wire connected, go to step  11 . If voltage is not 4.0-5.5 volts with jumper wire connected, go to step  9 .
7. Check position sensor for intermittent malfunction. See NOTES ON INTERMITTENTS  under DIAGNOSIS & TESTING. After repairs, go to step  13 . If no problem was found, go to step  12 .
8. Check for short to ground, an open or short to voltage in Light Green/Black wire between position sensor and RTD control module and repair as necessary. See WIRING DIAGRAMS  . After repairs, go to step  13 . If Light Green/Black wire is okay, go to step  12 .
9. Check for short to ground, an open or short to voltage in Light Green/White wire between position sensor and RTD control module and repair as necessary. See WIRING DIAGRAMS  . After repairs, go to step  13 . If Light Green/White wire is okay, go to step  12 .
10. Check for an open in Red/Black wire between position sensor and RTD control module and repair as necessary. See WIRING DIAGRAMS  . After repairs, go to step  13 . If Red/Black wire is okay, go to step  8 .
11. Replace left rear position sensor. See RTD POSITION SENSOR  under REMOVAL & INSTALLATION. After repairs, go to step  13 .
12. Replace RTD control module. See RTD CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to next step.
13. Turn ignition off. Reinstall/reconnect all components/connectors. Using scan tool, clear all DTCs.