1.CHECK HARNESS BETWEEN ECM AND CAMSHAFT POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM and camshaft position sensor.
3) Measure the resistance of harness between the ECM and camshaft position sensor connector.
Connector & terminal
(B134) No. 12 — (E15) No. 1:
(B134) No. 22 — (E15) No. 2:
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Is the resistance less than 1 Ω?
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Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit of the harness between the ECM and camshaft position sensor
• Poor contact of coupling connector
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2.CHECK HARNESS BETWEEN ECM AND CAMSHAFT POSITION SENSOR.
Measure the resistance between camshaft position sensor connector and engine ground.
Connector & terminal
(E15) No. 1 — Engine ground:
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Is the resistance 1 MΩ or more?
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Repair the short circuit to ground of harness between the ECM and camshaft position sensor.
NOTE:
The harness between both connectors are shielded. Remove the shield and repair the ground short circuit of the harness circuit.
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3.CHECK CONDITION OF CAMSHAFT POSITION SENSOR.
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Is the camshaft position sensor installation bolt tightened securely?
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Tighten the camshaft position sensor installation bolt securely.
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4.CHECK CAMSHAFT POSITION SENSOR.
1) Remove the camshaft position sensor.
2) Measure the resistance between terminals of camshaft position sensor.
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Is the resistance 1 — 4 kΩ?
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Repair the poor contact of the ECM or camshaft position sensor connector.
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Replace the camshaft position sensor. 
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