DTC 32

DTC 32: G-SENSOR









CIRCUIT OPERATION
The G-sensor detects the acceleration level in the forward/reverse direction of the vehicle, converts the signals into voltage signals and then sends that signal to the ABS-ECU.

ABS DTC SET CONDITIONS
This code is output in the following case.
^ When the G-sensor output is 1.0V or lower or 4.0V or higher (disconnected G-sensor or G-sensor short circuit)
^ If the G-sensor output power does not change (G-sensor output fastening).

TROUBLESHOOTING HINTS
The most likely causes for DTC is to set are:
^ Malfunction of the G-sensor
^ Damaged wiring harness and connector
^ Malfunction of the hydraulic unit (integrated with ABS-ECU)

DIAGNOSIS

Required Special Tools:
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991324: Vehicle Communication Interface
^ MB991327: MUT-III USB Cable
^ MB991910: MUT-III Main Harness A
^ MB991529: Diagnostic Trouble Code Check Harness
^ MB991343: The harness set

STEP 1. Using scan tool MB991958, check data list.

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 the ON position.
3. Set scan tool MB991958 to data reading mode.
^ Item 32: G-sensor
^ When vehicle is stationary (level): 2.4 - 2.6 V
^ When vehicle is being driven: 3.4 - 3.6 V
Q: Is the G-sensor input normal?
YES: This malfunctions is intermittent.
NO: Go to Step 2.

STEP 2. Check the power supply circuit at G-sensor connector D-32.





1. Disconnect connector D-32, and check at the harness side.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between terminal 1 and ground. It should be approximately 12 volts (battery positive voltage).
Q: Is the voltage approximately 12 volts (battery positive voltage)?
YES: Go to Step 3.
NO: Go to Step 4.

STEP 3. Check the ground circuit at G-sensor connector D-32.





1. Disconnect connector D-32, and check at the harness side.
2. Check for the resistance between terminal 3 and ground. It should be less than 2 ohm.
Q: Is the resistance 2 ohm or less?
YES: Go to Step 6.
NO: Go to Step 5.

STEP 4. Check the harness wires between junction block connector C-202 terminal 8 and G-sensor connector D-32 terminal 1.











NOTE: After inspecting intermediate connector C- 106, inspect the wire. If intermediate connector C-106 is damaged, repair or replace it. If the connector has been repaired or replaced, go to Step 8.

Q: Is the harness wire between junction block connector C-202 terminal 8 and G-sensor connector D-32 terminal 1 damaged?
YES: Repair it and go to Step 8.
NO: Go to Step 8.

STEP 5. Check the harness wires between G-sensor connector D-32 terminal 3 and ABS-ECU connector B-03 terminal 8.








Q: Is any of the harness wires between G-sensor connector D-32 terminal 3 and ABS-ECU connector B-03 terminal 8 damaged?
YES: Repair it and go to Step 8.
NO: Erase the DTC memory, and recheck if any DTC sets. If DTC 32 sets, replace the hydraulic unit (integrated with ABS-ECU) and then go to step 8.

Step 6. Check G-sensor output power.





1. Disconnect connector D-32 connect special tool MB991348 between terminals of the disconnected connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between terminal 2 and ground.
^ It should be 2.4 - 2.6 volts when G-sensor is placed on a level plane.
^ Voltage should measure 3.4 - 3.6 volts when G-sensor is placed with its label face as shown.
Q: Is G-sensor output voltage normal?
YES: Go to Step 7.
NO: Replace the G-sensor and go to Step 8.

STEP 7. Check the harness wires between G-sensor connector D-32 terminal 2 and ABS-ECU connector B-03 terminal 15.








Q: Is any of the harness wires between G-sensor connector D-32 terminal 3 and ABS-ECU connector B-03 terminal 15 damaged?
YES: Repair it and go to Step 8.
NO: Erase the DTC memory, and recheck if any DTC sets. If DTC 32 sets, replace the hydraulic unit (integrated with ABS-ECU) and then go to step 8.

STEP 8. Recheck for diagnostic trouble codes.
Q: Does DTC 32 reset?
YES: Start over at Step 1.
NO: The procedure is complete.