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6E1–194 X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION D Diagnostic Trouble Code P0502 can be cleared by Diagnostic Aids D Poor connection at ECM: Inspect harness connectors locks, improperly formed or damaged terminals, and D Damaged harness: Inspect the wiring harness to the DTC P0502 – VSS Circuit Low Input
Step Action Value(s) Yes No 1 Was the ”On–Board Diagnostic (OBD) System Check” — Go to Step 2 Go to OBD System Check 2 1. Ignition OFF. ground wire. Did the light illuminate? — Go to Step 4 Go to Step 3 3 Repair the open in the sensor ground circuit. — Verify repair — 4 1. Ignition ON, sensor disconnected. VSS connector between ground and voltage Was the measurement near the specified value? Battery voltage Go to Step 6 Go to Step 5 5 Repair the open or short to ground in the VSS sensor — Verify repair — 6 1. Ignition OFF. connector and the ECM for the following conditions: D An open circuit D A short to ground Was the faulty condition located? — Verify repair Go to Step 9 7 Using a DVM, measure the resistance between the Is the resistance above the specified value? 10 K W Verify repair Go to Step 9 8 1. Remove the VSS from the transmission case. Does the VSS appear to be OK? — Verify repair — 9 Replace the VSS. — Verify repair — 10 Replace the ECM. Is the action complete? — Verify repair — |