B1403

Code

Other B — Body

Driver Power Window Up Switch Circuit Failure

Brand: Other

Type: B — Body

Views: UK: 33 EN: 53 RU: 38

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty driver power window up switch (mechanical or internal electrical failure)
Open, short to ground, or short to battery in the up switch wiring or connector
Corroded or loose connector at the switch or body/window control module
Blown fuse or poor battery/ground connection affecting the circuit
Faulty body control module / power window control module
Damage to wiring caused by door motion (pinched/frayed harness in door hinge)

Symptoms

Driver window will not move up when using the driver up switch
Intermittent or inconsistent operation of driver window up function
Switch may feel loose or have poor tactile feedback
Window may work from passenger/master switch but not driver up switch
Possible related warning or stored DTC(s) for power window circuit

What to check

Scan for stored codes and freeze frame; note whether code is active or historical
Attempt to reproduce the fault and verify the symptom with key on/engine off as required
Visual inspection of switch, door wiring harness, connectors, and body/window module
Check fuses and battery/ground connections related to power windows
Wiggle test wiring at door hinge while operating switch to look for intermittent faults
Backprobe switch connector and measure voltages and continuity with a DVOM

Signal parameters

Switch resting: open/high impedance on the up input (no battery voltage present)
When UP is pressed: up input should change to either near battery voltage (~11–14 V) or near ground (0 V), depending on vehicle circuit design
Continuity through closed switch contact: low resistance (typically < 5 ohms) between switch terminal and respective supply/ground
Open-circuit on the up circuit: infinite/very high resistance
Short to ground: near 0 V present on the up input at connector with switch not pressed
Short to battery: near battery voltage (~12 V) present on the up input with switch not pressed

Diagnostic algorithm

Verify the code: Use a scan tool to confirm B1403 is stored and note whether it is current or intermittent. Clear codes and attempt to reproduce the fault.
Visual inspection: Check the driver switch for damage, check connector pins for corrosion, and inspect the door hinge harness for pinching or fraying.
Verify power and ground: With ignition on, check relevant fuses and measure battery voltage at the switch power terminal and a good ground at the switch housing.
Wiggle test: With a helper operating the switch, wiggle the door wiring near the hinge to see if operation becomes intermittent—this indicates harness damage.
Backprobe switch connector: Monitor the up switch signal while pressing and releasing the UP position. Confirm the input changes state (to battery or ground) only when pressed and is stable otherwise.
Resistance/continuity test: With ignition off and battery disconnected if necessary, measure continuity from the switch terminal to the body/window control module terminal to check for opens or high resistance. Check for shorts to ground or battery.
Bypass/test switch: If wiring checks out, bench-test or temporarily substitute a known-good driver up switch and re-test operation and DTC presence.
Module input check: If switch and wiring are good, use a scan tool to monitor the window control module inputs or command the module and verify reactions. If module input is not receiving correct signals despite good wiring and switch, suspect a module fault.
Repair and retest: Repair or replace failed wiring, connector, switch or module as indicated. Clear codes and verify repair by cycling the window many times and rechecking for stored codes and correct function.
Final verification: Confirm full up/down function and that the DTC does not return after multiple cycles and normal door movement.

Likely causes

Intermittent or failed up switch contacts
Wiring damage at the door hinge harness (open or short when door moved)
Corroded/loose switch connector
Faulty window control module (less common)

Fault status

⚠️ Status

Driver power window UP switch circuit failure detected — open, short to ground, short to battery, or implausible signal on the Up switch input to the body/window control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours