Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
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Disconnect the Ignition Control (IC) module connector C1, and then using a Digital Volt Ohmmeter (DVOM), measure the resistance between terminals A and B (harness side). The resistance should be 800- 1600 ohms. Measure the resistance between pins E and F of the same connector. The resistance should be 800 - 1600 ohms. If the resistance is out of normal values in step 1, disconnect the crankshaft sensor A and measure the resistance across terminals A and B at the sensor connector. The meter should read LO. If the resistance was OK in test 1, but not within normal specifications on step 2, disconnect crankshaft sensor B and measure the resistance across terminals A and B at the sensor connector, the meter should read LO. If the reading with wires from the IC to the crankshaft sensor is LO, jump the crankshaft sensor wires together at the crankshaft sensor end and then measure the resistance of the wires from the IC pins A-B for crankshaft sensor A and from E-F for crankshaft sensor B. The resistance should be less than 5 ohms. If the wires check OK, the crankshaft sensor will need to be replaced.
P0322 ICM 4X Reference Circuit Malfunction - With Automatic Transmission
P1350 Ignition Control (IC) Circuit Malfunction - With Automatic Transmission
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