Cruise Control System Pinpoint Test 10: Flash Code 4 - Speed Signal Circuit Failure

PINPOINT TEST 10 - FLASH CODE 4 - SPEED SIGNAL CIRCUIT FAILURE

PINPOINT TEST 10		FLASH CODE 4 - SPEED SIGNAL CIRCUIT FAILURE
STEP	INSPECTION		ACTION
1	CHECK THE SPEEDOMETER OPERATION Check the speedometer for correct operation by driving the vehicle. Does the speedometer operate correctly?	Yes	Go to next step.
		No	See INSTRUMENT CLUSTER DIAGNOSIS to diagnose the speedometer.
2	CHECK CIRCUIT GY/B FOR AN OPEN Key in OFF position. Disconnect: Speed Control Servo 0120-101. Disconnect: Powertrain Control Module (PCM) 0140-175. Measure the resistance between the PCM 0140-175 pin 68, circuit GY/B, harness side and the speed control servo 0120-101 pin 3, circuit GY/B, harness side. Is the resistance less than 5 ohms?	Yes	Go to next step.
		No	Repair the circuit. Test the system for normal operation. See SYMPTOM TROUBLESHOOTING CHART - CRUISE CONTROL  .
3	CHECK CIRCUIT GY/B FOR A SHORT TO GROUND Disconnect: Instrument Cluster 0922-102 Measure the resistance between the speed control servo 0120-101 pin 3, circuit GY/B, harness side and ground. Is the resistance greater than 10,000 ohms?	Yes	Install a new cruise control servo. See CRUISE CONTROL SERVO REMOVAL/INSTALLATION . Test the system for normal operation. See SYMPTOM TROUBLESHOOTING CHART - CRUISE CONTROL  .
		No	Repair the circuit. Test the system for normal operation. See SYMPTOM TROUBLESHOOTING CHART - CRUISE CONTROL  .
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.
Courtesy of MAZDA MOTORS CORP.