Inspection Procedure 3

Inspection Procedure 3: When the Selector Lever is Moved to "N" Position, Cruise Control is not Cancelled [CVT].

CIRCUIT OPERATION

When the selector lever is operated, the selector lever position signal from the transmission range switch is sent to the TCM. ECM receives the selector lever position signal from the TCM via the CAN bus line.

COMMENT

- Malfunction of CAN bus line.
- Malfunction of CVT system.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CASE:)

- Malfunction of CAN bus system.
- Damaged harness or connector.
- Malfunction of CVT system.
- Malfunction of the transmission range switch.
- Malfunction of the TCM.
- Malfunction of the ECM.

DIAGNOSTIC PROCEDURE

CAUTION:
If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines CAN Bus Line Diagnostics Flow.)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool MB991958 to the data link connector (Refer to Reading and Clearing Diagnostic Trouble Codes).

(2)Turn the ignition switch to the "ON" position.

(3)Set scan tool MB991958 to diagnose the CAN bus line (Refer to Scan Tool Testing and Procedures).

Q. Is the check result satisfactory?

YES Go to Step 2.
NO Repair the CAN bus lines CAN Bus Diagnostics Chart). Then go to Step 6.
STEP 2. Using scan tool MB991958, check the CVT system data list item 49: Transmission range switch.

(1)Connect scan tool MB991958 to the data link connector (Refer to Reading and Clearing Diagnostic Trouble Codes).

(2)Turn the ignition switch to the "ON" position.

(3)Set scan tool MB991958 to data reading mode for CVT system Scan Tool Testing and Procedures.)

- Item 49: Transmission range switch.

Q. Is the switch operating properly?

YES Go to Step 3.
NO Repair the CVT system P0705.) Then go to Step 6.
STEP 3. Using scan tool MB991958, read the CVT system DTC.

(1)Connect scan tool MB991958 to the data link connector (Refer to Reading and Clearing Diagnostic Trouble Codes).

(2)Turn the ignition switch to the "ON" position.

(3)Set scan tool MB991958 to check for CVT system DTC Reading and Clearing Diagnostic Trouble Codes.)

Q. Is any DTC set?

YES Repair the CVT system Continuously Variable Transaxle (CVT).) Then go to Step 6.
NO Go to Step 4.
STEP 4. Using scan tool MB991958, check data list item 88: Neutral switch.

(1)Connect scan tool MB991958 to the data link connector (Refer to Reading and Clearing Diagnostic Trouble Codes).

(2)Turn the ignition switch to the "ON" position.

(3)Set scan tool MB991958 to data reading mode for cruise control system (Refer to Scan Tool Testing and Procedures.)

- Item 88: Neutral switch.
- When selector lever is at the "P" and "N" position, the display on scan tool MB991958 should be "ON."
- When selector lever is other than "P" and "N" position, the display on scan tool MB991958 should be "OFF."

Q. Is the switch operating properly?

YES Go to Step 5.
NO Replace the ECM [ Removal and Replacement]. Then go to Step 6.
STEP 5. Check the symptom.

Q. When the selector lever is moved to "N" position, is the cruise control cancelled?

YES It can be assumed that this malfunction is intermittent How to Cope With Intermittent Malfunctions).
NO Replace the ECM [ Removal and Replacement]. Then go to Step 6.
STEP 6. Check the symptom.

Q. When the selector lever is moved to "N" position, is the cruise control cancelled?

YES The procedure is complete.
NO Return to Step 1.