DTC 34
DTC 34: Steering Angular Velocity SensorSTEERING ANGULAR VELOCITY SENSOR SYSTEM CIRCUIT
Refer to DTC 31. DTC 31
CIRCUIT OPERATION
Refer to DTC 31. DTC 31
DTC SET CONDITIONS
DTC 34 is set when no change in the steering angular velocity sensor signal at a vehicle speed of above 15 km/h (9.3 mph) is detected for a total of more than 15 minutes
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:)
^ Malfunction of the steering angular velocity sensor
^ Damaged harness and connector
^ Malfunction of the AWD-ECU
DIAGNOSIS
Required Special Tool:
^ MB991958: Scan Tool (M.U.T-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991827: USB Cable
^ MB991911: Main Harness B
STEP 1. Using scan tool MB991958, check data list items 53, 54: Steering Angular Velocity Sensor.
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.
1) Connect scan tool MB991958 to the data link connector.
2) Turn the ignition switch to ON position.
3) Set scan tool MB991958 to the data reading mode.
^ Item 53: Steering Angular Velocity Sensor
^ When the steering wheel is turned to the left, ON and OFF are displayed alternately.
^ Item 54: Steering Angular Velocity Sensor
^ When the steering wheel is turned to the right, ON and OFF are displayed alternately.
4) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the sensor operating properly?
YES: It can be assumed that this malfunction is intermittent.
NO: Go to Step 2.
STEP 2. Measure the steering angular velocity sensor voltage at AWD-ECU connector C-138 by backprobing
1) Turn the ignition switch to the ON position.
2) Measure the voltage between the following terminals of AWD-ECU connector C-138 and ground while turning the steering wheel.
^ Terminal 33
^ Terminal 34
^ Changes between approximately 1.5 Volts and 3.5 V.
3) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the check result normal?
YES: Go to Step 3.
NO: Go to Step 5.
STEP 3. Check AWD-ECU connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES: Go to Step 4.
NO: Repair or replace the damaged components.
STEP 4. Using scan tool MB991958, check data list items 53, 54: Steering Angular Velocity Sensor.
CAUTION: To prevent damage to scan tool steering angular velocity sensor MB991958, always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting scan tool MB991958.
1) Connect scan tool MB991958 to the data link connector.
2) Turn the ignition switch to ON position.
3) Set scan tool MB991958 to the data reading mode.
^ Item 53: Steering Angular Velocity Sensor
^ When the steering wheel is turned to the left, ON and OFF are displayed alternately.
^ Item 54: Steering Angular Velocity Sensor
^ When the steering wheel is turned to the right, ON and OFF are displayed alternately.
4) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the sensor operating properly?
YES: It can be assumed that this malfunction is intermittent.
NO: Replace the AWD-ECU.
STEP 5. Check intermediate connector C-122, AWD-ECU connector C-138 and steering angular velocity sensor connector C-230 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 6.
NO: Repair or replace the damaged components.
STEP 6. Check the harness for open circuit to ground between AWD-ECU connector C-138 (terminals 33, 34) and steering angular velocity sensor connector C-230 (terminals 5, 4).
Q: Is the harness wire in good condition?
YES: Go to Step 7.
NO: Repair or replace the harness wire.
STEP 7. Using scan tool MB991958 read the ACD diagnostic trouble code.
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.
1) Turn the ignition switch to the ON position.
2) Check for ACD diagnostic trouble code.
3) Turn the ignition switch to the LOCK (OFF) position.
Q: Is DTC 34 set?
YES: Replace the steering angular velocity sensor.
NO: The procedure is complete.