8206code.fm Page 105 Tuesday, July 7, 1998 11:57 AM
DIAGNOSTIC CODE 4-1, 4-2 OR 4-3 Test 4
1. Turn the ignition key to the OFF position.
Checking for a short in the sensor
2. Disconnect the J1A connector from the V-MAC II module. 3. Check for continuity between J1A connector pins H3 (the MPH sensor PLUS [+] line) and G3 (the MPH sensor MINUS [−] line).
If there is continuity, locate and repair the short in the harness. Retest to be sure the problem has been corrected. If there is no continuity, proceed to Test 10.
Test 6 Checking the voltage in the harness Figure 160 — MPH Sensor
1. Visually inspect the MPH sensor for a repairable short to ground on harness connector pin B.
If there is a repairable condition, repair the connector or replace the MPH sensor. Retest to be sure the problem has been corrected. If there is not a repairable condition, replace the MPH sensor. Retest to be sure the problem has been corrected.
Figure 162 — Voltage between Pins A and B
1. Turn the ignition key to the ON position.
Test 5 Checking for continuity on the MPH PLUS (+) and MPH MINUS (−) lines
2. Measure the voltage between harness connector pins A (the signal [+] line) and B (the ground [−] line) on the sensor side of the connector.
If the voltage is greater than 4.0 volts, proceed to Test 13. If there is no voltage, proceed to Test 12.
Figure 161 — Continuity between Pins G3 and H3
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