LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 1994 >> Impreza Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Code Testing >> Code 13 - Camshaft Position Sensor
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Code 13 - Camshaft Position Sensor

NOTE: Refer to illustration for ECU connector and terminal identification. See Figure -Figure .
  1. Place oscilloscope leads between ECU connector E30, terminals No. 8 and 9. Check signal voltage on oscilloscope while cranking engine. For voltage specifications, see information in the PIN VOLTAGE CHARTS article. If input signal is okay, repair ECU harness connector or replace ECU as necessary. If ECU input signal is not okay, go to next step.
  2. Turn ignition off. Disconnect ECU and camshaft position sensor connectors. Measure resistance between ECU connector E30, terminal No. 8 and camshaft position sensor connector terminal No. 1 (Black wire), and ECU connector E30, terminal No. 9 and camshaft position sensor connector terminal No. 2 (White wire). In both cases, resistance should be 10 ohms maximum. Measure resistance between ground and ECU connector E30, terminals No. 8, 9 and 11. Resistance should be a minimum of one megohm at each terminal.
  3. If resistances are not to specification, repair or replace harness or connectors as necessary. If resistances are to specification, remove camshaft position sensor. Put positive lead of oscilloscope at camshaft position sensor terminal No. 1 (Black wire) and negative lead at terminal No. 2 (White wire). Check for a wave pattern while passing a magnet near camshaft position sensor pick-up coil.
  4. If a wave pattern appears, check for problem between camshaft position sensor and camshaft sprocket. If a wave pattern does not appear, replace camshaft position sensor.
scientia non olet · About LEMON Manuals