DTC 32
DTC 32, 33: 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 32 is set when the steering angular velocity sensor ST-N has been detected at the neutral position in a state where the steering wheel has been determined to have changed above 40° from steering angular velocity sensor ST-1 and ST-2.
^ DTC 33 is set when the steering angular velocity sensor ST-N has been detected at the neutral position in a state where the steering wheel has been determined to have changed above 400° from steering angular velocity sensor ST-1 and ST-2.
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 item 52: 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 52: Steering Angular Velocity Sensor
^ When the steering wheel is fixed at the neutral position, the display on scan tool MB991958 should be ON.
^ When the steering wheel is turned from the neutral position, the display on scan tool MB991958 should be OFF.
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 AWD-ECU connector C-138 terminal 44 and ground while turning the steering wheel.
^ Changes between approximately 1.5 Volts and 3.5 Volts.
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 item 52: 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 52: Steering Angular Velocity Sensor
^ When the steering wheel is fixed at the neutral position, the display on scan tool MB991958 should be ON.
^ When the steering wheel is turned from the neutral position, the display on scan tool MB991958 should be OFF.
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 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 the ignition switch and the AWD-ECU connector C-138 terminal 44 and steering angular velocity sensor connector C-230 terminal 1.
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 MB9991958 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: Are DTCs 32, 33 set?
YES: Replace the steering angular velocity sensor.
NO: The procedure is complete.