DTC P1605/P1606 - ACCELERATION/ROUGH ROAD SENSOR CIRCUIT Hyundai Tiburon I

Note. This test is associated with DTC P1605 - Rough Road Sensor Circuit Malfunction and P1606 - Rough Road Sensor Out Of Range.

1. Install scan tool. Start engine and check if DTC P1605 or P1606 is present. If DTC is present, go to next step. If DTC is not present, problem is intermittent. See INTERMITTENTS in «TESTS W/O CODES»(ref-16665) article.
2. Turn ignition off. Disconnect acceleration sensor harness connector. Connect DVOM between acceleration sensor harness connector terminal No. 2 ground. See appropriate wiring diagram in «WIRING DIAGRAMS»(ref-16650) article. Continuity should be present. If continuity is present, go to next step. If continuity is not present, check circuit between acceleration sensor harness connector terminal No. 2 and ECM.
3. Disconnect ECM harness connector. Connect DVOM between ground and acceleration sensor harness connector terminal No. 1. Jumper ECM harness connector terminal No. 80 to ground. Continuity should be present. If continuity is not present, check for open between acceleration sensor harness connector and ECM harness connector. Remove jumper from ECM harness connector terminal No. 80. Continuity should not be present. If continuity is present, check for short between acceleration sensor harness connector and ECM harness connector. If circuit is okay, go to next step.
4. Reconnect acceleration sensor and ECM harness connectors. Using DVOM, backprobe acceleration sensor harness connector terminal No. 1 or ECM harness connector terminal No. 80. Start engine. With engine at idle, DVOM should read 2.3-2.7 volts. With accelerator applied (driving), DVOM should read 0.5-4.5 volts. If voltage reading is as specified, go to next step. If voltage reading is not as specified, replace acceleration sensor.
5. Clear DTC. See CLEARING CODES under Self Diagnostic System section. Retest system. If DTC resets, replace ECM.