GMC 16208961 Module,Knock Sensor

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For DIS System check, perform the ignition system checks first.

The module can be tested with special equipment.

When replacing the knock sensor, disconnect the negative battery terminal and remove the distributor or oil pressure sending unit if necessary. Disconnect the electrical connector and remove the knock sensor from the engine block. Installation is the reverse of removal.

The first step is to remove the engine cover.

To check the sensor's resistance, disconnect the electrical connector and measure the resistance between the terminal and the engine block. If the resistance is not within the specified range, the knock sensor should be replaced.

For EDI System check, examine the crankshaft sensor reference voltage and resistance, and inspect the crankshaft sensor circuit for any issues. To remove the EDI ignition module, detach the negative battery cable, disconnect the ignition module electrical connector, remove both module attaching screws, and lift the module from its mount. For installation, secure the module with screws and plug in the electrical connector. Reattach the cable to the negative terminal of the battery.

Remove the distributor cap and wires as an assembly, followed by the rotor.

For DIS System check, perform the ignition system checks first. Then, disconnect the two-wire electrical connectors from the ignition module and verify battery voltage on the pink wire. Check the resistance of the crankshaft sensor and circuit. Also, check the output voltage signal from the crankshaft sensor. If all the tests pass but there is no spark output at any of the coils, the ignition module may be defective. If any system check findings are incorrect, diagnose the individual circuits and components. To remove the DIS system, detach the negative battery cable, label and disconnect all spark plug wires from the DIS assembly, unplug the electrical connector at the module, and remove the DIS and support bracket assembly. Unbolt and separate the coil and module assemblies, then detach the wires between the module and coil assemblies from the spade terminals on the underside of the coils. Unbolt the module from the support bracket. Installation is the reverse of removal, ensuring the wires are attached to the new module's coil assembly spade terminals in the same order as removed.

For EDI System check, examine the crankshaft sensor reference voltage and resistance, and inspect the crankshaft sensor circuit for any issues. To remove the EDI ignition module, detach the negative battery cable, disconnect the ignition module electrical connector, remove both module attaching screws, and lift the module from its mount. For installation, secure the module with screws and plug in the electrical connector. Reattach the cable to the negative terminal of the battery.