DIAGNOSTIC CODE 2-3 OR 2-4

Test 256

Checking for a defective V-MAC II module or a loose connector

1.With the ignition key in the OFF position, reconnect the V-MAC II connectors.

2.Turn the ignition key to the ON position.

If blink code 2-3 or 2-4 is still active, check the V-MAC II module and connector for dirt, loose or broken pins, or repairable damage. If no repairable conditions are evident, replace the V-MAC II module. Retest to be sure the problem has been corrected.

If blink code 2-3 or 2-4 is not active, the procedures have corrected the problem. Check all connectors to ensure proper connections.

DIAGNOSTIC CODE 3-2

DIAGNOSTIC BLINK CODE 3-2

RPM/TDC (ENGINE POSITION) SENSOR TESTS

When performing electrical tests, it is important to wiggle wires and connectors to identify intermittent connection problems.

Test 1

Checking for an open or short in the sensor

The engine must be running to see an active fault on the RPM/TDC circuit.

1.Turn the ignition key to the OFF position and disconnect the RPM/TDC sensor from the harness.

2.Measure the resistance between harness connector pins A (the signal [+] line) and B (the ground [ ] line).

If the resistance is between 200 and 300 ohms, proceed to Test 2.

The RPM/TDC sensor signal [+] line (harness connector pin A) is connected to the RPM/TDC MINUS [−] line (J1A connector pin H2) in order to invert the signal.

If the resistance is not between 200 and 300 ohms, repair the connector or replace the sensor. Retest to be sure the problem has been corrected.