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ABS SENSOR SYSTEM CIRCUIT Mitsubishi Lancer Evolution IX

On-Vehicle Service - Lancer Evolution 17 illustrations ~2699 words

ABS SENSOR SYSTEM CIRCUIT

The AWD-ECU receives each ABS sensor signal.

DTC 25 is set as wrong-diameter tire when one of the four vehicle speeds is outside the range of specified values in respect to the average of the four vehicle speed sensors, when the vehicle speed is above 20 km/h (12 mph) with the steering wheel in the straight ahead position. However the warning light does not light up.

  1. Malfunction of the tire
  2. Malfunction of the ABS sensor
  3. Damaged harness and connector
  4. Malfunction of the AWD-ECU

Required Special Tool

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: USB Cable MB991911: Main Harness B
  1. STEP 1. Check the tire. Check the tire pressure, size and brand. Q: Is the check result normal? YES: Go to Step 2. NO: Adjust or replace the tire.
  2. STEP 2. 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. Turn the ignition switch to the "ON" position. Check for ACD diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.21, 22, 23, 24) set? YES: Refer to «DTCs 21, 22, 23, 24: ABS Sensor System»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/manual-trans/#on-vehicle-service-lancer-evolution) . NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, check data list items 01, 02, 03, 04: ABS Sensor. Connect scan tool MB991958 to the data link connector. Start the engine. Set scan tool MB991958 to the data reading mode. Item 01: ABS Sensor < FR > Item 02: ABS Sensor < FL > Item 03: ABS Sensor < RR > Item 04: ABS Sensor < RL > The speedometer indication matches the M.U.T.-III indication. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Replace the AWD-ECU.

The AWD-ECU receives each ABS sensor signal through the ABS-ECU to detect the tire conditions.

DTC 25 is set as wrong-diameter tire when one of the four vehicle speeds is outside the range of specified values in respect to the average of the four vehicle speed sensors, when the vehicle speed is above 20 km/h (12 mph) with the steering wheel in the straight ahead position. However the warning light does not light up.

  1. Malfunction of the tire
  2. Malfunction of the ABS sensor
  3. Damaged harness and connector
  4. Malfunction of the ABS-ECU
  5. Malfunction of the AWD-ECU

Required Special Tool

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: USB Cable MB991911: Main Harness B
  1. STEP 1. Check the tire. Check the tire pressure, size and brand. Q: Is the check result normal? YES: Go to Step 2. NO: Adjust or replace the tire.
  2. STEP 2. Using scan tool MB991958, read the ABS 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. Turn the ignition switch to the "ON" position. Check for ABS diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.11, 12, 13, 14, 21, 22, 23, 24) set? YES: Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/anti-locktraction-control/#anti-lock-braking-system-abs-lancer-evolution__diagnostic-trouble-code-chart) . NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, read the ACD diagnostic trouble code. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Check for ACD diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.21, 22, 23, 24) set? YES: Refer to «DTCs 21, 22, 23, 24: ABS Sensor System»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/manual-trans/#on-vehicle-service-lancer-evolution) . NO: Go to Step 4.
  4. STEP 4. Using scan tool MB991958, check data list item 01, 02, 03, 04: ABS Sensor. Connect scan tool MB991958 to the data link connector. Start the engine. Set scan tool MB991958 to the data reading mode. Item 01: ABS Sensor < FR > Item 02: ABS Sensor < FL > Item 03: ABS Sensor < RR > Item 04: ABS Sensor < RL > The speedometer indication matches the M.U.T.-III indication. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Replace the AWD-ECU.

The AWD-ECU receives each ABS sensor signal.

DTC 26 is set as output signal error of the ABS sensor when one wheel speed is outside the specified range at the vehicle speed of above 20 km/h (12 mph). However, warning light will light up.

  1. Malfunction of the tire
  2. Malfunction of the ABS sensor
  3. Damaged harness and connector
  4. Malfunction of the AWD-ECU

Required Special Tool

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: USB Cable MB991911: Main Harness B
  1. STEP 1. Check the tire. Check the tire pressure, size and brand. Q: Is the check result normal? YES: Go to Step 2. NO: Adjust or replace the tire.
  2. STEP 2. 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. Turn the ignition switch to the "ON" position. Check for ACD diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.21, 22, 23, 24) set? YES: Refer to «DTCs 21, 22, 23, 24: ABS Sensor System»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/manual-trans/#on-vehicle-service-lancer-evolution) . NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, check data list items 01, 02, 03, 04: ABS Sensor. Connect scan tool MB991958 to the data link connector. Start the engine. Set scan tool MB991958 to the data reading mode. Item 01: ABS Sensor < FR > Item 02: ABS Sensor < FL > Item 03: ABS Sensor < RR > Item 04: ABS Sensor < RL > The speedometer indication matches the M.U.T.-III indication. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Replace the AWD-ECU.

The AWD-ECU receives each ABS sensor signal through the ABS-ECU to detect the conditions of the ABS sensors.

DTC 26 is set as output signal error of the ABS sensor when one wheel speed is outside the specified range at the vehicle speed of above 20 km/h (12 mph). However, warning light will light up.

  1. Malfunction of the tire
  2. Malfunction of the ABS sensor
  3. Damaged harness and connector
  4. Malfunction of the ABS-ECU
  5. Malfunction of the AWD-ECU

Required Special Tool

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: USB Cable MB991911: Main Harness B
  1. STEP 1. Check the tire. Check the tire pressure, size and brand. Q: Is the check result normal? YES: Go to Step 2. NO: Adjust or replace the tire.
  2. STEP 2. Using scan tool MB991958, read the ABS 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. Turn the ignition switch to the "ON" position. Check for ABS diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.11, 12, 13, 14, 21, 22, 23, 24) set? YES: Refer to «DIAGNOSTIC TROUBLE CODE CHART»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/anti-locktraction-control/#anti-lock-braking-system-abs-lancer-evolution__diagnostic-trouble-code-chart) . NO: Go to Step 3.
  3. STEP 3. Using scan tool MB991958, read the ACD diagnostic trouble code. Connect scan tool MB991958 to the data link connector. Turn the ignition switch to the "ON" position. Check for ACD diagnostic trouble code. Turn the ignition switch to the "LOCK" (OFF) position. Q: Are DTCs (No.21, 22, 23, 24) set? YES: Refer to «DTCs 21, 22, 23, 24: ABS Sensor System»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/manual-trans/#on-vehicle-service-lancer-evolution) . NO: Go to Step 4.
  4. STEP 4. Using scan tool MB991958, check data list item 01, 02, 03, 04: ABS Sensor. Connect scan tool MB991958 to the data link connector. Start the engine. Set scan tool MB991958 to the data reading mode. Item 01: ABS Sensor < FR > Item 02: ABS Sensor < FL > Item 03: ABS Sensor < RR > Item 04: ABS Sensor < RL > The speedometer indication matches the M.U.T.-III indication. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Replace the AWD-ECU.

Scheme 214

Scheme 214: DTC 31: Steering Angular Velocity Sensor < ST-1, ST-2, ST-N > System
Scheme 214: DTC 31: Steering Angular Velocity Sensor < ST-1, ST-2, ST-N > System

The steering angular velocity sensor detects the neutral position and steering angle of the steering wheel by the photointerruptor (ST-1, ST-2 or ST-N), and sends them to the AWD-ECU.

DTC 31 is set when open circuit or short circuit of the steering angular velocity sensor output line (ST-1, ST-2, or ST-N) occurs.

  1. Malfunction of the steering angular velocity sensor
  2. Damaged harness wires and connectors
  3. Malfunction of the AWD-ECU

Required Special Tool

  1. MB991958: Scan Tool (M.U.T.-III Sub Assembly) MB991824: V.C.I. MB991827: USB Cable MB991911: Main Harness B

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  1. STEP 1. Using scan tool MB991958, check data list items 21, 22, 23: Steering Angular Velocity Sensor Voltage. 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. Turn the ignition switch to the "ON" position. Set scan tool MB991958 to the data reading mode. Item 21: Steering Angular Velocity Sensor Voltage < ST-1 > Item 22: Steering Angular Velocity Sensor Voltage < ST-2 > When the steering wheel is turned, 1 - 2 V and 2.5 - 4.5 V are displayed alternately. Item 23: Steering Angular Velocity Sensor Voltage < ST-N > When the steering wheel is fixed at the neutral position, 1 - 2 V is displayed, and when the steering wheel is turned, 2.5 - 4.5 V is displayed. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Go to Step 2.
  2. STEP 2. Measure the steering angular velocity sensor voltage at AWD-ECU connector C-138 by backprobing. Turn the ignition switch to the "ON" position. Measure the voltage between the following terminals of AWD-ECU connector C-138 and ground while turning the steering wheel. Terminal 33 < ST-1 > Terminal 34 < ST-2 > Terminal 44 < ST-N > Changes between approximately 1.5 V and 3.5 V. 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 .
  3. 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. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer-evolution) .
  4. STEP 4. Using scan tool MB991958, check data list items 21, 22, 23: Steering Angular Velocity Sensor Voltage. 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. Turn the ignition switch to the "ON" position. Set scan tool MB991958 to the data reading mode. Item 21: Steering Angular Velocity Sensor Voltage < ST-1 > Item 22: Steering Angular Velocity Sensor Voltage < ST-2 > When the steering wheel is turned, 1 - 2 V and 2.5 - 4.5 V are displayed alternately. Item 23: Steering Angular Velocity Sensor Voltage < ST-N > When the steering wheel is fixed at the neutral position, 1 - 2 V is displayed, and when the steering wheel is turned, 2.5 - 4.5 V is displayed. 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. Refer to «HOW TO COPE WITH INTERMITTENT MALFUNCTIONS»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/hoistjack/#general-lancer-evolution__how-to-cope-with-intermittent-malfunctions) . NO: Replace the AWD-ECU.
  5. 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. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer-evolution) .
  6. STEP 6. Check the harness for open circuit to ground between AWD-ECU connector C-138 (terminals 33, 34, 44) and steering angular velocity sensor connector C-230 (terminals 5, 4, 1). Q: Is the harness wire in good condition? YES: Go to Step 7. NO: Repair or replace the harness wire.
  7. STEP 7. Measure the voltage at steering angular velocity sensor connector C-230. Disconnect the steering angular velocity sensor connector C-230, and measure the voltage between terminal 2 and ground at the harness side. Turn the ignition switch to the "ON" position. The voltage should measure battery positive voltage. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the measured voltage battery positive voltage? YES: Go to Step 10 . NO: Go to Step 8.
  8. STEP 8. Check joint connector (2) C-101, junction block connector C-210 and C-211, 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 9. NO: Repair or replace the damaged components. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer-evolution) .
  9. STEP 9. Check the harness for open circuit or short circuit to ground between the ignition switch and steering angular velocity sensor connector C-230 terminal 2. Q: Is the harness wire in good condition? YES: Go to Step 10. NO: Repair or replace the harness wire.
  10. STEP 10. Measure the voltage at steering angular velocity sensor connector C-230. Disconnect the steering angular velocity sensor connector C-230, and measure the resistance between terminal 3 and ground at the harness side. The resistance should measure less than 2 ohms Q: Is the measured resistance less than 2 ohms? YES: Go to Step 4 . NO: Go to Step 11.
  11. STEP 11. Check joint connector (3) C-06 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 12. NO: Repair or replace the damaged components. Refer to «HARNESS CONNECTOR INSPECTION»(/mitsubishi/lancer-evolution/ix-2005-2007/remont/body-electrical/#general-electrical-lancer-evolution) .
  12. STEP 12. Check the harness for open circuit to ground between the ignition switch and the steering angular velocity sensor connector C-230 terminal 3 and ground. Q: Is the harness wire in good condition? YES: Replace the steering angular velocity sensor. NO: Repair or replace the harness wire.