JA41 - Check CKP Amplitude at ICM - Amplitude Fault

- Key Off.

- Disconnect ICM from ICM tee, leave EI diagnostic harness connected to vehicle harness connector.

- DVOM on 40 volt AC scale.

- Crank engine and measure voltage between J48 (CKP+ I) and J47 (CKP- I) at breakout box.

- Is settled AC voltage reading greater than 0.4 volts?

YES -- REPLACE ICM. CKP is shorted in ICM. REMOVE all test equipment. RECONNECT all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- Go to JA42. JA42 - Check Circuit Resistance - Amplitude Fault - Key Off