EPS DTC Troubleshooting: 33-02, 33-07, 34-02
DTC 33-02: Upper FET Stuck ON
DTC 33-07: Upper FET Stuck ON
DTC 34-02: Fail-Safe Relay
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the how to troubleshoot the EPS.

DTC Description
DTC
Freeze Frame
33-02 Upper FET Stuck ON
    
33-07 Upper FET stuck ON
    
34-02 Fail-Safe Relay
    

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then start the engine.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
33-02 Upper FET Stuck ON
    
33-07 Upper FET stuck ON
    
34-02 Fail-Safe Relay
    

Is DTC 33-02, 33-07, or 34-02 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time.?
2.
Shorted wire check (MTR lines to power) 1:

Shorted wire check (MTR lines to power) 1
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between these test points and body ground individually.
Test condition
IG ON (II) or ON mode
 
EPS control unit connector B (16P): disconnected

Connector
Test circuit
Terminal
EPS Control Unit Connector B (16P)
MTR V
No. 1 (BLK)
MTR U
No. 2 (RED)
MTR W
No. 3 (WHT)


Is there battery voltage?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
The MTR wires are not shorted to power. Go to step 4.
3.
Shorted wire check (MTR lines to power) 2:

Shorted wire check (MTR lines to power) 2
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between these test points and body ground individually.
Test condition
IG ON (II) or ON mode
 
EPS control unit connector B (16P): disconnected
 
EPS motor 3P connector: disconnected

Connector
Test circuit
Terminal
EPS Control Unit Connector B (16P)
MTR V
No. 1 (BLK)
MTR U
No. 2 (RED)
MTR W
No. 3 (WHT)


Is there battery voltage?

     
YES
     
     
     
Repair a short to power in the wire between the EPS control unit and the EPS motor.?
     
NO (L4 engine)
     
     
     
Short circuit in EPS motor. Replace the EPS motor.?
     
NO (V6 engine)
     
     
     
Short circuit in EPS motor. Replace the steering gearbox.?
4.
EPS control unit check (update):

EPS control unit check (update)
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Reconnect the following connector.

?3.
Update the EPS control unit if it does not have the latest software.

?4.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode, then start the engine.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
33-02 Upper FET Stuck ON
    
33-07 Upper FET stuck ON
    
34-02 Fail-Safe Relay
    

Is DTC 33-02, 33-07, or 34-02 indicated?

     
YES
     
     
     
     
NO
     
     
     
Troubleshooting is complete.?