B1660

Code

Other B — Body

Seat Driver Front Up Circuit Open

Brand: Other

Type: B — Body

Views: UK: 23 EN: 42 RU: 23

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Blown fuse or fusible link for seat adjust circuit
Open or broken wiring between seat switch, motor, and control module
Corroded/loose connector at seat switch, motor or module
Faulty driver seat up switch (stuck open)
Failed seat adjust motor or internal motor connector
Faulty seat control module or poor ground

Symptoms

Driver seat will not move in the "up" direction when using the control switch
No audible motor noise when attempting up adjustment
Intermittent seat up operation or only other directions work (down/forward/back)
Possible related seat position warnings (vehicle-specific)

What to check

Verify stored DTCs and freeze frame data with scan tool; record before clearing
Visually inspect fuse(s) and fusible links related to power seats
Inspect seat wiring harness, connectors and pins at the switch, motor and control module for damage, corrosion or loose pins
Operate the seat switch while watching/feeling for motor activity and listening for relays
Probe the seat switch connector for reference voltage, switched voltage and ground with a multimeter while operating the switch
Perform continuity check between switch, motor and module with connectors disconnected

Signal parameters

Expected battery voltage (~12 V) at power feed to seat switch with ignition ON
Switched voltage present at motor connector when UP switch is activated: near battery voltage when circuit closed, 0 V when open
Switch closed continuity: near 0 ohms across the switch contacts when pressed to UP
Motor coil resistance: typically low ohms to tens of ohms (vehicle-specific)
Open-circuit reading: infinite resistance/OL between switch and motor or between switch and module when wiring broken

Diagnostic algorithm

Read and record all DTCs and freeze-frame data with a scan tool; note any related seat or occupant classification codes
Visually inspect fuse(s) for seat circuit and replace if blown; recheck code
With ignition ON, operate UP switch and verify if any voltage appears at the switch power terminal and at the motor connector using a multimeter
If no power to switch, trace back to fuse and wiring harness for breaks or disconnected connectors
Disconnect switch and check switch continuity when actuated to UP; replace switch if continuity not present
If switch is OK, check continuity from switch output to motor input; repair any open wiring or connector faults
Bench-test the motor by applying appropriate battery voltage directly (observe safety and correct polarity) to confirm motor operation; replace motor if it does not run
Inspect and test ground connections for low resistance to chassis; clean/tighten as needed
If wiring, switch and motor test good, check seat control module inputs/outputs with scan tool and oscilloscope if available; replace/repair module per OEM procedure if module outputs are faulty
After repairs, clear DTCs and verify proper seat UP operation; perform final road/test checks and re-scan for codes

Likely causes

Open or damaged wiring/connector at the seat switch or motor
Failed driver-seat up switch
Blown fuse or poor ground connection

Fault status

⚠️ Status

Circuit open detected in driver front seat "up" control circuit. The control module is not seeing the expected signal when the seat-up command is selected; the seat may not move up.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5 - 2.0 hours