Test No. 5: Cruise Control Cannot Be Set
CAUTION:
To prevent damage to Scan Tool (MB991502), always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting scan tool.
- Can the auto-cruise control-ECU communicate with scan tool?
- Connect scan tool to the data link connector. See Fig 1.
- Turn the ignition switch to the ON position.
- Turn the ignition switch to the ON position. Select AUTO-CRUISE CONTROL SYSTEM.
- Turn the ignition switch to the LOCK (OFF) position. Disconnect scan tool.
- If YES, go to next step.
- If NO, inspect each trouble symptom. Refer to TEST NO. 1: SCAN TOOL COMMUNICATION WITH CRUISE CONTROL ECU NOT POSSIBLE .
- Using scan tool, check the any DTC set. Connect scan tool to the data link connector. See Fig 1. Turn the ignition switch to the ON position. Read the DTC. Turn the ignition switch to the LOCK (OFF) position. Disconnect scan tool. Is any DTC set?
- If YES, DTC 11, 12, 14, 15, 16 or 17 is set. Go to indicated DTC test procedure.
- DTC 11, see DTC 11: VACUUM PUMP DRIVE SYSTEM .
- DTC 12, see DTC 12: VEHICLE SPEED SENSOR .
- DTC 14, see DTC 14: STOPLIGHT SWITCH SYSTEM .
- DTC 15, see DTC 15: CRUISE CONTROL SWITCH .
- DTC 16, see DTC 16: CRUISE CONTROL ECU .
- DTC 17, see DTC 17: THROTTLE POSITION SENSOR . Check that malfunction is eliminated.
- If NO, go to next step.
- If YES, DTC 11, 12, 14, 15, 16 or 17 is set. Go to indicated DTC test procedure.
- Using scan tool, check data list. See Fig 1 and Fig 2
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Do item 4: Auto-cruise control CANCEL switch, item 5: Stoplight switch and item 14: Park/neutral position switch meet normal condition?
- If YES, check that the malfunction is eliminated. If the malfunction is eliminated, it can be assumed that this malfunction is intermittent. Recheck wiring harness and components. If the malfunction is not eliminated, replace the auto-cruise control-ECU. Check that malfunction is eliminated.
- If NO, for item 4, see DTC 15: CRUISE CONTROL SWITCH , for item 5, see TEST NO. 2: CRUISE CONTROL DOES NOT CANCEL WHEN BRAKE PEDAL IS DEPRESSED and item 14, see TEST NO. 3: CRUISE CONTROL DOES NOT CANCEL WHEN TRANSAXLE IS SHIFTED TO "N" RANGE .