5.3I System

TEST 10H1: CHECK ABS SENSOR OUTPUT USING SCAN TOOL
Read the ABS sensor output corresponding to the faulty system in the scan tool function mode.

NOTE: The scan tool display shows that the front right wheel is rotating at 30 km/h.

CHECK: Does the speed indicated on the display change in response to the speedometer reading during acceleration/deceleration when the steering wheel is in the straight ahead position?
YES: See Test 10H2
NO: See Test 10H9

TEST 10H2: CHECK ABS SENSOR INSTALLATION
Tightening torque: 32 ± 10 Nm (3.3 ± 1.0 kg-m, 24 ± 7 ft. lbs.)
CHECK: Are the ABS sensor installation bolts tightened securely?
YES: See Test 10H3
NO: Tighten ABS sensor installation bolts securely.

TEST 10H3: CHECK TONE WHEEL INSTALLATION
Tightening torque: 13 ± 3 Nm (1.3 ± 0.3 kg-m) 9 ± 2.2 ft. lbs.)
CHECK: Are the tone wheel installation bolts tightened securely?
YES: See Test 10H4
NO: Tighten tone wheel installation bolts securely.

TEST 10H4: CHECK ABS SENSOR GAP
Measure tone wheel-to-pole piece gap over entire perimeter of the wheel.

CHECK: Is the gap within the specifications shown in the table?

YES: See Test 10H5
NO: Adjust the gap.

NOTE: Adjust the gap using spacers (Part No. 26755AA000 or equivalent). If spacers cannot correct the gap, replace worn sensor or worn tone wheel.

TEST 10H5: CHECK HUB RUNOUT
Measure hub runout.
CHECK: Is the runout less than 0.05 mm (0.0020 inch)?
YES: See Test 10H6
NO: Repair hub.

TEST 10H6: CHECK FOR POOR CONTACT IN CONNECTORS
Turn ignition switch to OFF.
CHECK: Is there poor contact in connectors between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) and ABS sensor?
YES: Repair connector.
NO: See Test 10H7

TEST 10H7: CHECK ABSCM & H/U
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode. Inspection Mode - On-Board Diagnostics (OBD)
4) Read out the trouble code.
CHECK: Is the same trouble code as in the current diagnosis still being output?
YES: Replace ABS Control Module (ABSCM) & Hydraulic Unit (H/U).
NO: See Test 10H8

TEST 10H8: CHECK FOR ANY OTHER TROUBLE CODES
CHECK: Are other trouble codes being output?
YES: Proceed with the diagnosis corresponding to the trouble code.
NO: A temporary poor contact is indicated.

NOTE: Check harness and connectors between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) and ABS sensor.

Legacy:

TEST 10H9: CHECK ABS SENSOR RESISTANCE
1) Turn ignition switch to OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance of ABS sensor connector terminals.
Terminal:
Front RH No. 1 & No. 2
Front LH No. 1 & No. 2
Rear RH No. 1 & No. 2
Rear LH No. 1 & No. 2
CHECK: Is the resistance between 0.8 and 1.2 k ohms?
YES: See Test 10H10
NO: Replace ABS sensor.

Outback:

TEST 10H10: CHECK BATTERY SHORT OF ABS SENSOR
1) Disconnect connector from ABS Control Module (ABSCM) & Hydraulic Unit (H/U).
2) Measure voltage between ABS sensor and chassis ground.
Terminal:
Front RH No. 1 (+) & Chassis ground (-)
Front LH No. 1 (+) & Chassis ground (-)
Rear RH No. 1 (+) & Chassis ground (-)
Rear LH No. 1 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 10H11
NO: Replace ABS sensor.

Outback:

TEST 10H11: CHECK BATTERY SHORT OF ABS SENSOR
1) Turn ignition switch to ON.
2) Measure voltage between ABS sensor and chassis ground.
Terminal:
Front RH No. 1 (+) & Chassis ground (-)
Front LH No. 1 (+) & Chassis ground (-)
Rear RH No. 1 (+) & Chassis ground (-)
Rear LH No. 1 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 10H12
NO: Replace ABS sensor.

Outback:

TEST 10H12: CHECK HARNESS BETWEEN ABSCM & H/U AND ABS SENSOR
1) Turn ignition switch to OFF.
2) Connect connector to ABS sensor.
3) Measure resistance between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) connector terminals.
Connector & terminal:
Trouble code 21 / (F49) No. 11 & No. 12
Trouble code 23 / (F49) No. 9 & No. 10
Trouble code 25 / (F49) No. 14 & No. 15
Trouble code 27 / (F49) No. 7 & No. 8
CHECK: Is the resistance between 0.8 and 1.2 k ohms?
YES: See Test 10H13
NO: Repair harness/connector between ABSCM & H/U and ABS sensor.

TEST 10H13: CHECK BATTERY SHORT OF HARNESS
Measure voltage between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) connector and chassis ground.
Connector & terminal:
Trouble code 21 / (F49) No. 11 & Chassis ground
Trouble code 23 / (F49) No. 9 & Chassis ground
Trouble code 25 / (F49) No. 14 & Chassis ground
Trouble code 27 / (F49) No. 7 & Chassis ground
CHECK: Is the voltage less than 1 Volt?
YES: See Test 10H14
NO: Repair harness between ABSCM & H/U and ABS sensor.

TEST 10H14: CHECK BATTERY SHORT OF HARNESS
1) Turn ignition switch to ON.
2) Measure voltage between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) connector and chassis ground.
Connector & terminal:
Trouble code 21 / (F49) No. 11 & Chassis ground
Trouble code 23 / (F49) No. 9 & Chassis ground
Trouble code 25 / (F49) No. 14 & Chassis ground
Trouble code 27 / (F49) No. 7 & Chassis ground
CHECK: Is the voltage less than 1 Volt?
YES: See Test 10H15
NO: Repair harness between ABSCM & H/U and ABS sensor.

TEST 10H15: CHECK ABS SENSOR INSTALLATION
CHECK: Tightening torque: 32 ± 10 Nm (3.3 ± 1.0 kg-m, 24 ± 7 ft. lbs.)
Are the ABS sensor installation bolts tightened securely?
YES: See Test 10H16
NO: Tighten ABS sensor installation bolts securely.

TEST 10H16: CHECK TONE WHEEL INSTALLATION
CHECK: Tightening torque: 13 ± 3 Nm (1.3 ± 0.3 kg-m, 9 ± 2.2 ft. lbs.)
Are the tone wheel installation bolts tightened securely?
YES: See Test 10H17
NO: Tighten tone wheel installation bolts securely.

TEST 10H17: CHECK ABS SENSOR GAP
Measure tone wheel-to-pole piece gap over entire perimeter of the wheel.

CHECK: Is the gap within the specifications shown in the table?
YES: See Test 10H18
NO: Adjust the gap.

NOTE: Adjust the gap using spacers (Part No. 26755AA000 or equivalent). If spacers cannot correct the gap, replace worn sensor or worn tone wheel.

TEST 10H18: CHECK HUB RUNOUT
Measure hub runout.
CHECK: Is the runout less than 0.05 mm (0.0020 inch)?
YES: See Test 10H19
NO: Repair hub.

Legacy:

TEST 10H19: CHECK FOR POOR CONTACT IN CONNECTORS
1) Turn ignition switch to ON.
2) Measure resistance between ABS sensor and chassis ground.
Terminal:
Front RH No. 1 & Chassis ground
Front LH No. 1 & Chassis ground
Rear RH No. 1 & Chassis ground
Rear LH No. 1 & Chassis ground
CHECK: Is the resistance more than 1 M ohm?
YES: See Test 10H20
NO: Replace ABS sensor and ABS Control Module (ABSCM) & Hydraulic Unit (H/U).

Outback:

TEST 10H20: CHECK GROUND SHORT OF HARNESS
1) Turn ignition switch to OFF.
2) Connect connector to ABS sensor.
3) Measure resistance between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) connector terminal and chassis ground.
Connector & terminal:
Trouble code 21 / (F49) No. 11 & Chassis ground
Trouble code 23 / (F49) No. 9 & Chassis ground
Trouble code 25 / (F49) No. 14 & Chassis ground
Trouble code 27 / (F49) No. 7 & Chassis ground
CHECK: Is the resistance more than 1 M ohm?
YES: See Test 10H21
NO: Repair harness between ABSCM & H/U and ABS sensor.
And replace ABSCM & H/U.

TEST 10H21: CHECK FOR POOR CONTACT IN CONNECTORS
Turn ignition switch to OFF.
CHECK: Is there poor contact in connectors between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) and ABS sensor?
YES: Repair connector.
NO: See Test 10H22

TEST 10H22: CHECK ABSCM & H/U
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode. Inspection Mode - On-Board Diagnostics (OBD)
4) Read Out the trouble code.
CHECK: Is the same trouble code as in the current diagnosis still being output?
YES: Replace ABS Control Module (ABSCM) & Hydraulic Unit (H/U).
NO: See Test 10H23

TEST 10H23: CHECK FOR ANY OTHER TROUBLE CODES
CHECK: Are other trouble codes being output?
YES: Proceed with the diagnosis corresponding to the trouble code.
NO: A temporary poor contact is indicated.

NOTE: Check harness and connectors between ABS Control Module (ABSCM) & Hydraulic Unit (H/U) and ABS sensor.