System Input
- System input tests should be performed if no trouble codes are stored when performing SELF-DIAGNOSTICS . System input tests cycle each cruise control switch and sensor.
- Use Scan Tool (MB991341) for system input check. Use scan tester according to operating instructions provided with tester. Connect leads of analog voltmeter between cruise control terminal and ground terminal of data link connector. SeeFigure . Turn ignition switch to ON position.
- To display results of input check, move 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.
INSPECTION CHART FOR TROUBLE SYMPTOMS
| Trouble Symptom | Inspection 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 Clutch Pedal Depressed (M/T) | 5 | |
| With Select Lever In Neutral (A/T) | 6 | |
| With CANCEL Switch ON | 7 | |
| Diagnosis Display Normal/Cruise Control Will Not Set | 8 | |
| Cruise Control Cannot Be Set | 9 | |
| Hunting Occurs At Set Speed | 10 | |
| W/Cruise Control Main Switch ON/Switch Indicator Does Not Light/Cruise Control Operation Normal | 11 | |
| Cruise Control Main Switch Light Does Not Illuminate | 12 | |
| Indicator Light Inside Combination Meter Doesn't Light/Cruise Control Operation Normal | 13 | |