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Home >> Toyota >> 1997 >> 4Runner Base, RWD, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Cruise Control System - 3.4L) >> Circuit Testing >> Test 4: Speed Sensor Circuit
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Test 4: Speed Sensor Circuit

WARNING: This page is about a different variant/trim than selected.
  1. Perform VEHICLE SPEED SENSOR test under CRUISE CONTROL FUNCTION TEST  under TROUBLE SHOOTING. If speed sensor input signals are as specified, check CC ECU. See PIN VOLTAGE TESTS . If found to be defective, replace CC ECU and retest system. If input signals are not as specified, go to next step.
  2. Check harness and connector between speedometer and CC ECU. Repair or replace as necessary. If connections are okay, go to next step.
  3. Remove instrument cluster. Disconnect connector and remove vehicle speed sensor from instrument cluster. Connect positive battery lead to sensor terminal No. 1. Connect negative battery lead to sensor terminal No. 2. Connect voltmeter positive lead to sensor terminal No. 3 and negative lead to sensor terminal No. 2. For 2WD vehicles, see Fig 1 or Fig 2 . For 4WD vehicles, See Fig 3.
  4. Ensure a change of 0-11 volts or more occurs as sensor shaft is rotated. Voltage should change 4 times per each rotation. If sensor operation is not as specified, replace sensor. If sensor operation is as specified, replace CC ECU and retest system.
Fig 1: Testing Vehicle Speed Sensor - 2WD Models With M/T
G96B06168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Testing Vehicle Speed Sensor - 2WD Models With A/T
G96D06169Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Testing Vehicle Speed Sensor - 4WD Models
G96F06170Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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