INSPECTION PROCEDURE 6: Auto-cruise Control cannot be Set.: Diagnosis

Required Special Tools:

MB991502: Scan Tool (MUT-II)
MB991223: Harness Set

STEP 1. Can the auto-cruise control ECU communicate with scan tool MB991502?
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Using scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Turn the ignition switch to the "ON" position.
Q: Can the auto-cruise control ECU communicate with the scan tool?
1. YES: Go to Step 2.
2. NO: Inspect each trouble symptom.
(Refer to Inspection Procedure number 1 SYMPTOM PROCEDURES .)

Fig 1: Connecting Scan Tool To Data Link Connector (Procedure 6)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Is any diagnostic trouble code output?
Q: Is any diagnostic trouble code output?
1. YES: Diagnostic trouble code number 11, 12, 14, 15, 16 or 17 is output, refer to the following.
  (Code number 11 DIAGNOSTIC TROUBLE CODE PROCEDURES .)
  
  (Code number 12 DTC 12: VEHICLE SPEED SIGNAL SYSTEM .) ( M/T )
  
  (Code number 12 DTC 12: VEHICLE SPEED SIGNAL SYSTEM .) ( A/T )
  
  (Code number 14 DTC 14: STOPLIGHT SWITCH SYSTEM .)
  
  (Code number 15 DTC 15: AUTO-CRUISE CONTROL SWITCH SYSTEM .)
  
  (Code number 16 DTC 16: AUTO-CRUISE CONTROL-ECU .)
  
  (Code number 17 DTC 16: AUTO-CRUISE CONTROL-ECU .)
  
  Then check that the malfunction is eliminated.
2. NO: Go to Step 3.
STEP 3. Using scan tool MB991502, check data list .
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Using scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector.
3. Check the following items in the data list.
  Refer to DATA LIST REFERENCE TABLE , Data List Reference Table.
  - Item 04: Auto-cruise control "CANCEL" switch.
  - Item 05: Stoplight switch.
  - Item 14: Clutch pedal position switch. ( M/T ).
  - Item 14: Park/neutral position switch. ( A/T )
4. Turn the ignition switch to the "ON" position.
Q: Is the check above meet the specifications?
1. YES: Check that the malfunction is eliminated.
  If the malfunction is not eliminated, replace the auto-cruise control ECU. (Refer to AUTO-CRUISE CONTROL .)
  
  Then check that the malfunction is eliminated.
2. NO: Follow the diagnostic trouble code procedures and the symptom procedures below.
  - Item 04: Refer to Diagnostic Trouble Code Procedures number 15 DTC 15: AUTO-CRUISE CONTROL SWITCH SYSTEM .
  - Item 05: Refer to Symptom Procedures number 2 INSPECTION PROCEDURE 2: WHEN THE BRAKE PEDAL IS DEPRESSED, AUTO-CRUISE CONTROL IS NOT CANCELLED. .
  - Item 14: Refer to Symptom Procedures number 3 ( M/T ) INSPECTION PROCEDURE 3: WHEN THE CLUTCH PEDAL IS DEPRESSED, AUTO-CRUISE CONTROL IS NOT CANCELLED. ( M/T ) .
  - Item 14: Refer to Symptom Procedures number 4 ( A/T ) INSPECTION PROCEDURE 4: WHEN THE SELECTOR LEVER IS MOVED TO "N" RANGE, AUTO-CRUISE CONTROL IS NOT CANCELLED. .
    
    Fig 2: Connecting Scan Tool To Data Link Connector (Procedure 6)
    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.