System Function Test
- With ignition off, check 20-amp STOP and 10-amp METER fuses. Replace blown fuses and turn ignition on. If fuse(s) fail again, go to next step. If fuses do not fail, go to step 3).
- With ignition off, locate and disconnect interior fuse block connectors. Check resistance between Green/Yellow wire and ground, and between Black/Yellow wire and ground. If resistance is less than 5 ohms, repair short circuit in wire(s). If resistance is more than 5 ohms, go to next step.
- Locate speed control unit and turn ignition on. Measure voltage on Black/Yellow wire at speed control unit. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Black/Yellow wire and recheck voltage.
- Locate stoplight switch and clutch switch (if equipped). Measure voltage at switch(es) on Black/Yellow wire (Green/Yellow wire with automatic transmission). If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Black/Yellow (Green/Yellow) wire and recheck voltage. See Fig 1 and Fig 2 .
- Turn ignition off. Measure voltage on Blue/Orange wire (White/Green wire with automatic transmission) at stoplight (clutch) switch connector with pedal depressed. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, replace stoplight (clutch) switch.
- Locate speed control unit. Measure resistance of Blue/Orange (White/Green) wire between switch(es) and speed control unit. If resistance is more than 5 ohms, repair wire(s). If resistance is less than 5 ohms, go to next step.
- Locate horn relay. Measure voltage on Green/Yellow wire at horn relay connector. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Green/Yellow wire. See Fig 3 .
- Measure voltage on Green/Black wire at horn relay connector. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, replace horn relay. See Fig 3 .
- Locate speed control/horn switch. Measure voltage at switch on Green/Black wire. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Green/Black wire. See Fig 4 .
- Turn ignition off. Measure resistance at speed control/horn switch between Black wire and ground. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair Black wire.
- Disconnect speed control/horn switch. Connect positive lead of ohmmeter to Blue/White wire terminal and negative lead to Black wire terminal of speed control/horn switch. Measure resistance between Blue/White wire and Black wire terminals while holding switch in various positions. See SPEED CONTROL/HORN SWITCH POSITION
table. Replace speed control/horn switch if any reading is not as specified. If resistance readings are as specified, go to next step.SPEED CONTROL/HORN SWITCH POSITION
Switch Position Resistance OFF Less Than 5 Ohms ON Greater Than 10,000 Ohms SET/ACCEL Approximately 680 Ohms RESUME Approximately 2200 Ohms COAST Approximately 120 Ohms - Locate speed control unit. Turn ignition off. Measure Blue/White wire resistance between speed control/horn switch and speed control unit. If resistance is more than 5 ohms, repair Blue/White wire. If resistance is less than 5 ohms, go to next step. See Fig 4 and Fig 5 .
- Measure resistance at speed control unit between Black wires and ground. If resistance is more than 5 ohms, repair Black wire(s). If resistance is less than 5 ohms, go to next step. See Fig 5
. See SPEED CONTROL CIRCUIT FUNCTION
table.SPEED CONTROL CIRCUIT FUNCTION
Pin Wire Color Function A GRN Speed Control Actuator B GRN/BLK Speed Control Actuator C GRN/WHT Speed Control Actuator D A/T BLK/ORG Brake On/Off Switch (A/T) M/T BLK/ORG Clutch Pedal Position Switch (M/T) F BLK/YEL Vehicle Power H GRN/RED Vehicle Speed Sensor I BLK/WHT Speed Control/Horn Switch J BLU/BLK Speed Control Actuator K BLK Ground L RED/BLK Self Test Connector (A/T) M BLK Ground N WHT/GRN Brake On/Off Switch - Locate electronic speed sensor. Sensor is located between upper and lower speedometer cable in engine compartment. Measure Green/Red wire resistance between speed control unit and speed sensor. If resistance is more than 5 ohms, repair Green/Red wire. If resistance is less than 5 ohms, go to next step.
- Measure resistance between Black wire and ground at speed sensor. If resistance is more than 5 ohms, repair Black wire. If resistance is less than 5 ohms, go to next step.
- To test speed sensor, disconnect speedometer cable at transaxle. Disconnect speed control unit and rotate speedometer cable. If there is continuity between Green/Red wire and ground 4 times per cable rotation, go to next step. If continuity does not register as described, replace speed sensor.
- Locate speed control actuator. Measure resistance between speed control unit and actuator at Green/White, Green, Blue/Black and Green/Black wires. Repair wire(s) with resistance more than 5 ohms. If resistance is less than 5 ohms, go to next step. See Fig 6 .
- Disconnect speed control actuator. Apply battery voltage and ground to actuator terminals and verify actuator operation. See appropriate ACTUATOR TESTING
table. If control cable operations are not as indicated, replace actuator. If actuator responds as indicated, go to next step.NOTE: For actuator to respond correctly, ground and voltage must be applied to all indicated terminals at the same time.
- To check speed control unit, drive vehicle 40 MPH (64 km/h). Set speed control switch on. Wait several seconds for speed control module to accept a "set" command. Try all control positions for proper operation. If speed control operation is not satisfactory, replace speed control unit.
ACTUATOR TESTING
| Control Cable Operation & Circuit Wire Color | Connect Terminal(s) To | |||||
|---|---|---|---|---|---|---|
| Pull | ||||||
| GRN/BLK & BLU/BLK | 12 Volts | |||||
| GRN/WHT & GRN | Ground | |||||
| Lock (1) | ||||||
| BLU/BLK | 12 Volts | |||||
| GRN/WHT | Ground | |||||
| Extend | ||||||
| GRN/WHT & GRN | 12 Volts | |||||
| GRN/BLK & BLU/BLK | Ground | |||||
| Release | (2) | |||||
|
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