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DTC B1342

BHE060201038W04

DTC | B1342 | EPS control module
DETECTION CONDITION | • The on-board diagnostic function detects control module malfunction.
POSSIBLE CAUSE | • Open or short to ground circuit in wiring harness between EPS control module terminal 1A and battery positive terminal. • Open or short circuit in wiring harness between the following EPS control module terminals and EPS motor terminals: – EPS control module terminal 4A-EPS motor terminal A (L.H.D.) or B (R.H.D.) – EPS control module terminal 4B-EPS motor terminal B (L.H.D.) or A (R.H.D.) • Open circuit in wiring harness between EPS control module terminal 1B and battery negative terminal • EPS control module malfunction • EPS motor malfunction • EPS 60 A fuse malfunction • Noise filter malfunction • Poor connection of each connector

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT FUSE • Inspect EPS 60 A fuse. • Is EPS 60 A fuse normal? | Yes | Go to the next step.
No | Replace EPS 60 A fuse, then go to Step 10.
2 | INSPECT WHETHER MALFUNCTION IS CAUSED BY POOR CONNECTION OF EPS CONTROL MODULE OR PIN DEFORMATION • Turn the ignition switch off. • Inspect connection of the EPS control module and wiring harness. • Disconnect the EPS control module connector. • Inspect whether malfunction is caused by bent or poorly connected EPS control module connector pin. • Are connection and pin of connector and wiring harness normal? | Yes | Go to the next step.
No | Repair or replace faulty connector harness, then go to Step 6.
3 | INSPECT EPS MOTOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Disconnect the battery positive terminal. • Inspect for continuity between EPS control module terminal 1A and battery positive terminal. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between the EPS control module and battery, then go to Step 10.
4 | INSPECT EPS MOTOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between EPS control module terminal 1A and ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between the EPS control module and battery, then go to Step 10.
No | Go to the next step.
5 | INSPECT EPS MOTOR CIRCUIT FOR OPEN CIRCUIT • Disconnect the noise filter connector. • Inspect for continuity between the EPS control module terminals and noise filter terminals. – EPS control module terminal 4A-noise filter terminal a (L.H.D.) or b (R.H.D.) – EPS control module terminal 4B-noise filter terminal b (L.H.D.) or a (R.H.D.) • Is there continuity? | Yes | Go to the next step.
No | Replace the noise filter, then go to Step 10.
6 | INSPECT EPS MOTOR CIRCUIT FOR OPEN CIRCUIT • Disconnect the EPS motor connector. • Inspect for continuity between the EPS motor terminals and noise filter terminals. – EPS motor terminal A (L.H.D.) or B (R.H.D.)-noise filter terminal a (L.H.D.) or b (R.H.D.) – EPS motor terminal B (L.H.D.) or A (R.H.D.)-noise filter terminal b (L.H.D.) or a (R.H.D.) • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between the EPS motor and noise filter, then go to Step 10.
7 | INSPECT EPS MOTOR CIRCUIT FOR SHORT TO POWER • Measure the voltage between the EPS motor terminals and ground. – EPS motor terminal A (L.H.D.) or B (R.H.D.)-ground – EPS motor terminal B (L.H.D.) or A (R.H.D.)-ground • Is there any B+? | Yes | Repair or replace the wiring harness for short to power between the EPS motor and noise filter, then go to Step 10.
No | Go to the next step.
8 | INSPECT EPS MOTOR CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between the EPS motor terminals and ground. – EPS motor terminal A (L.H.D.) or B (R.H.D.)-ground – EPS motor terminal B (L.H.D.) or A (R.H.D.)-ground • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground between the EPS motor and noise filter, then go to Step 10.
No | Go to the next step.
9 | INSPECT EPS MOTOR GROUND CIRCUIT FOR OPEN CIRCUIT • Disconnect the battery negative terminal. • Measure continuity between EPS control module terminal 1B and battery negative terminal. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit between the EPS control module and battery, then go to the next step.
10 | VERIFY TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See Clearing DTCs Procedure.) • Turn the ignition switch off. • Start the engine. • Is the same DTC present? | Yes | Replace the EPS control module and/or steering gear and linkage, then go to the next step. (See EPS CONTROL MODULE REMOVAL/INSTALLATION.) (See STEERING GEAR AND LINKAGE REMOVAL/INSTALLATION.)
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.