8206code.fm Page 75 Tuesday, July 7, 1998 11:57 AM
DIAGNOSTIC CODE 3-2 Test 2
Test 4
Checking for a short to ground in the sensor
Checking for proper RPM sensor adjustment 1. Check that the sensor is properly adjusted in the flywheel housing. For proper adjustment, turn the sensor in by hand until it bottoms. Then back it out exactly 1 turn. Torque the jam nut to 15 lb-ft (20 N•m).
If the sensor is adjusted properly, proceed to Test 8.
Figure 113 — Continuity from Pin A to Ground
If the sensor is not adjusted properly, readjust the sensor. Retest to be sure the problem has been corrected.
Test 8 Checking for a short to voltage on the RPM PLUS line
Figure 114 — Continuity from Pin B to Ground
1. Check for continuity from harness connector pin A (the signal [+] line) to a good ground. 2. Check for continuity from harness connector pin B (the ground [−] line) to a good ground.
If there is continuity, replace the sensor. Retest to be sure the problem has been corrected. If there is no continuity, proceed to Test 4.
Figure 115 — Voltage from Pin H1 to Ground
1. Disconnect the J1A and J1B connectors from the V-MAC II module. 2. Connect the serial link jumper into the serial communication port. 3. Measure the voltage from J1A connector pin H1 (the RPM/TDC PLUS [+] line) to a good ground.
If the voltage is greater than 0.5 volts, the line is shorted to another line in the harness. Locate and repair the short. Retest to be sure the problem has been corrected. If the voltage is less than 0.5 volts, proceed to Test 16.
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