System Input Tests
- System input tests should be performed if no trouble codes are stored when performing RETRIEVING CODES under SELF-DIAGNOSTIC SYSTEM. System input tests cycle each cruise control switch and sensor.
- Use scan tool for system input check according to operating instructions provided with scan tool. Connect leads of analog voltmeter between cruise control terminal and ground terminal of data link connector. See Figure .
- Turn ignition on. To display results of input check, move cruise control SET switch to ON position. Then turn MAIN switch to ON position. Within one second, activate RESUME switch. Codes will display if circuit tested is okay. See Fig 1 .
INSPECTION CHART FOR TROUBLE SYMPTOMS
| Trouble Symptom | Perform Test No. | |
|---|---|---|
| Communication With Scan Tool Not Possible Communication With All Systems Not Possible) | 1 | |
| Communication With Cruise Control ECU Not Possible | 2 | |
| Diagnostic Inspection Possible/Input Inspection Not Possible | 3 | |
| Cruise Control Does Not Cancel | ||
| With Brake Pedal Depressed | 4 | |
| With Select Lever In Neutral | 5 | |
| With CANCEL Switch ON | 6 | |
| Diagnosis Display Normal/Cruise Control Will Not Set | 7 | |
| Cruise Control Cannot Be Set | 8 | |
| Hunting Occurs At Set Speed | 9 | |
| With Cruise Control Main Switch ON, Switch Indicator Does Not Illuminate Cruise Control Operation Normal) | 10 | |
| Cruise Control Main Switch Illumination Light Does Not Illuminate | 11 | |
| Indicator Light Inside Combination Meter Does Not Illuminate Cruise Control Operation Normal) | 12 | |
Fig 3: Identifying Cruise Control Circuit Connector Terminals: Cruise Control Actuator Connector (A-57 Or A-95)
Fig 6: Identifying Cruise Control Circuit Connector Terminals: Cruise Control Main Switch Connector (C-01)
Fig 10: Identifying Cruise Control Circuit Connector Terminals: Dash Harness/Transmission Harness Connector (C-124)
Fig 14: Identifying Cruise Control Circuit Connector Terminals: Joint Connectors No. 1, 2 & 3 (C-130, C-131 & C-132)