NANO

ENGINE DTC DESCRIPTION CAUSE DIAGNOSTIC LAMP ( MIL ) DIAGNOSTIC LAMP ( CEL ) Gil When Driven In CNG PROBABLE TROUBLE AREA P0508 Stepper motor short to ground Short Circuit to Ground ON OFF ON 1) Loose/ Damaged Connections. 2) Check the continuity from Stepper Motor connector pins to the ECU pins. (ECU pin 151-Stepper motor A; ECU pin 150/241- Stepper Motor B; ECU pin 149/113-Stepper Motor C; ECU pin 152-Stepper Motor D). 3) Check for back out of pins at both Stepper Motor connector and ECU connector. 4) Check for damage of pins at both sensor connector and ECU connector. 5) Faulty ISCV. 6) Faulty ECU. P0509 Stepper motor short to battery Short Circuit to Battery ON OFF ON P0511 Stepper motor signal error Signal Error ON OFF ON P0532 A/C Pressure sensor short to Battery error Short Circuit to Battery OFF OFF ON 1) Loose /Damaged connector. 2) A/C pressure sensor signal line Short to Battery/ Ground. 3) Check the continuity from A/C pressure sensor connector (Pin1 to ECU pin 137; Pin2 to ECU pin 110 & Pin3 to ECU pin 104). 4) Check for back out of pins at both A/C pressure sensor connector and ECU connector. 5) Faulty sensor. 6) Check refrigerant level. 7) Faulty ECU. P0533 A/C Pressure sensor short to ground or signal error Short Circuit to Ground/No signal detected OFF OFF ON