PRE-RELEASE
DTC 52 MOTOR MALFUNCTION
| DTC 52 MOTOR MALFUNCTION |
DIAGNOSIS:
| • |
Faulty
motor
|
|
| • |
Faulty motor relay
|
|
| • |
Faulty harness connector
|
|
TROUBLE SYMPTOM:
| • |
ABS does
not operate.
|
|
| • |
EBD does not operate.
|
|
WIRING DIAGRAM:
CHECK INPUT VOLTAGE OF ABSCM&H/U.
Turn the ignition switch to OFF.Disconnect the connector from ABSCM& H/U.
Turn the ignition switch to ON.
Measure the voltage between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 13 (+) — Chassis ground (−):
Is the voltage 10 — 15 V?
| Yes |
| No |
Repair the harness/connector between battery and ABSCM&H/U and check fuse SBF8.
CHECK GROUND BOLTS.
Turn the ignition switch to OFF.Are the ground bolts tightened 13 Nm (1.3 kgf-m, 9.6 ft-lb)?
| Yes |
| No |
Tighten the ground bolts securely.
CHECK GROUND CIRCUIT OF MOTOR.
Turn the ignition switch to OFF.Measure the resistance between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 12 — Chassis ground:
Is the resistance less than 0.5 Ω?
| Yes |
| No |
Repair the ABSCM&H/U ground harness.
CHECK INPUT VOLTAGE OF ABSCM&H/U.
Run the engine at idle.Measure the voltage between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 18 (+) — Chassis ground (−):
Is the voltage 10 — 15 V?
| Yes |
| No |
Repair the harness connector between battery, ignition switch and ABSCM&H/U.
CHECK GROUND CIRCUIT OF ABSCM&H/U.
Turn the ignition switch to OFF.Measure the resistance between ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
Is the resistance less than 0.5 Ω?
| Yes |
| No |
Repair the ABSCM&H/U ground harness.
CHECK MOTOR OPERATION.
Operate the sequence control.
| Note | ||
|
Use the diagnosis connector to operate sequence control. |
Can motor revolution noise (buzz) be heard when carrying out the sequence control?
| Yes |
| No |
Replace the ABSCM&H/U.
CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.Is there poor contact in connector between generator, battery and ABSCM&H/U?
| Yes |
Repair the connector.
| No |
CHECK ABSCM&H/U.
Connect all connectors.Erase the memory.
Perform the inspection mode.
Read out the DTC.
Is the same DTC as in current diagnosis still being output?
| Yes |
Replace the ABSCM&H/U.
| No |
CHECK ANY OTHER DTC APPEARANCE.
Are other DTCs being output?
| Yes |
Proceed with the diagnosis corresponding to DTC.
| No |
A temporary poor contact.
