Diagnostic Charts

TEST 8N1: CHECK RESISTANCE OF SOLENOID VALVE
1) Turn ignition switch to OFF.
2) Disconnect two connectors (ABS1, F9) from hydraulic unit.
3) Measure resistance between hydraulic unit connector terminals.
Connector & terminal:
Trouble code 31 / (ABS5) No. 4 & (ABS2) No. 2
Trouble code 33 / (ABS5) No. 1 & (ABS2) No. 2
Trouble code 35 / (ABS5) No. 2 & (ABS2) No. 2
Trouble code 37 / (ABS5) No. 3 & (ABS2) No. 2
CHECK: Is the resistance between 7.8 and 9.2 ohms?
YES: See Test 8N2
NO: Replace hydraulic unit.





TEST 8N2: CHECK GROUND SHORT OF SOLENOID VALVE
Measure resistance between hydraulic unit connector and chassis ground.
Connector & terminal:
Trouble code 31 / (ABS5) No. 4 & chassis ground
Trouble code 33 / (ABS5) No. 1 & chassis ground
Trouble code 35 / (ABS5) No. 2 & chassis ground
Trouble code 37 / (ABS5) No. 3 & chassis ground
CHECK: Is the resistance more than 1 M ohm?
YES: See Test 8N3
NO: Replace hydraulic unit.





TEST 8N3: CHECK BATTERY SHORT OF SOLENOID VALVE
1) Disconnect connector from ABS Control Module (ABSCM).
2) Measure voltage between hydraulic unit connector and chassis ground.
Connector & terminal
Trouble code 31 / (ABS5) No. 4 (+) & Chassis ground (-)
Trouble code 33 / (ABS5) No. 1 (+) & Chassis ground (-)
Trouble code 35 / (ABS5) No. 2 (+) & Chassis ground (-)
Trouble code 37 / (ABS5) No. 3 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 8N4
NO: Replace hydraulic unit.





TEST 8N4: CHECK BATTERY SHORT OF SOLENOID VALVE
1) Turn ignition switch to ON.
2) Measure voltage between hydraulic unit connector and chassis ground.
Connector & terminal:
Trouble code 31 / (ABS5) No. 4 (+) & Chassis ground (-)
Trouble code 33 / (ABS5) No. 1 (+) & Chassis ground (-)
Trouble code 35 / (ABS5) No. 2 (+) & Chassis ground (-)
Trouble code 37 / (ABS5) No. 3 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 8N5
NO: Replace hydraulic unit.





TEST 8N5: CHECK BATTERY SHORT OF HARNESS
1) Turn ignition switch to OFF.
2) Measure voltage between ABS Control Module (ABSCM) connector and chassis ground.
Connector & terminal:
Trouble code 31 / (F49) No. 30 (+) & Chassis ground (-)
Trouble code 33 / (F49) No. 24 (+) & Chassis ground (-)
Trouble code 35 / (F49) No. 23 (+) & Chassis ground (-)
Trouble code 37 / (F49) No. 31 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 8N6
NO: Repair harness between ABSCM and hydraulic unit.





TEST 8N6: CHECK BATTERY SHORT OF HARNESS
1) Turn ignition switch to ON.
2) Measure voltage between ABS Control Module (ABSCM) connector and chassis ground.
Connector & terminal:
Trouble code 31 / (F49) No. 30 (+) & Chassis ground (-)
Trouble code 33 / (F49) No. 24 (+) & Chassis ground (-)
Trouble code 35 / (F49) No. 23 (+) & Chassis ground (-)
Trouble code 37 / (F49) No. 31 (+) & Chassis ground (-)
CHECK: Is the voltage less than 1 Volt?
YES: See Test 8N7
NO: Repair harness between ABSCM and hydraulic unit.





TEST 8N7: CHECK BATTERY SHORT OF HARNESS
1) Turn ignition switch to OFF.
2) Measure resistance between ABS Control Module (ABSCM) connector and chassis ground.
Connector & terminal:
Trouble code 31 / (F49) No. 30 & Chassis ground
Trouble code 33 / (F49) No. 24 & Chassis ground
Trouble code 35 / (F49) No. 23 & Chassis ground
Trouble code 37 / (F49) No. 31 & Chassis ground
CHECK: Is the resistance more than 1 M ohm?
YES: See Test 8N8
NO: Repair harness between ABSCM and hydraulic unit.





TEST 8N8: CHECK HARNESS BETWEEN ABSCM AND HYDRAULIC UNIT
1) Connect connector to hydraulic unit.
2) Measure resistance between ABS Control Module (ABSCM) connector terminals.
Connector & terminal:
Trouble code 31 / (F49) No. 30 & No. 1
Trouble code 33 / (F49) No. 24 & No. 1
Trouble code 35 / (F49) No. 23 & No. 1
Trouble code 37 / (F49J No. 31 & No. 1
CHECK: Is the resistance between 8.3 and 9.7 ohms?
YES: See Test 8N9
NO: Repair harness/connector between ABSCM and hydraulic unit.

TEST 8N9: CHECK POOR CONTACT IN CONNECTORS
CHECK: Is there poor contact in connectors between ABS Control Module (ABSCM) and hydraulic unit?
NO: See Test 8N10
YES: Repair connector.

TEST 8N10: CHECK ABSCM
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the trouble code.
CHECK: Is the same trouble code as in the current diagnosis still being output?
NO: See Test 8N11
YES: Replace ABSCM.

TEST 8N11: 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.