Measure the resistance between camshaft position sensor connector and engine ground.
Connector & terminal
(E15) No. 1 — Engine ground:
Is the resistance 1 MΩ or more?
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.