![]() NOTE: Push the probes into the rear of the connector until the probe tips reach the metal connector pins.ħ. The positive DVM probe goes into the back of the connector cavity with the orange signal wire. The DVM negative probe goes into the back of the connector cavity with the black wire. ![]() Insert the leads from the digital volt meter into the back of the TPS connector. Turn the key "off" and plug the connector back onto the TPSĥ. Read from the purple wire to the black wire (these should be the outside pins). Short pieces of wire or paper clips can be used to extend the DVM probes for reaching into the connectors.ģ. Turn the key "on" and insert DVM probes into the connector to reach the connector pins. With the key "OFF", unplug the connector from the TPS.Ģ. Orange/dark blue stripe (center pin) = signalġ. Adjustment is relatively easy, and requires only a digital voltmeter and a few hand tools. The TPS is not officially adjustable but the mounting holes are slotted and the body can be rotated slightly. On many trucks, this voltage is too low, resulting in TCC chatter at moderate throttle loads. The service manual says to adjust for 0.8-1.2V at idle. ![]() Do not make any adjustments until the fluid level is correct, and burned fluid has been replaced. Before performing any adjustments, check the transmission fluid level and sniff the fluid. If one or more of these are out of adjustment or if the TPS is noisy, shifting will be erratic. The throttle position sensor, shift lever, and throttle valve cable are critical to proper operation of the transmission. ![]()
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