B396C Chevrolet Code - Liftgate Mode Switch Circuit Performance Signal Invalid
Quick Answer
The interior liftgate rotary control switch contains 3 resistors which are in series for the liftgate mode, depending upon which position is selected will determine which combination of resistors are used. Common causes include Faulty Liftgate Control Switch-Interior, Liftgate Control Switch-Interior harness is open or shorted, Liftgate Control Switch-Interior circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B396C Chevrolet indicates Liftgate Mode Switch Circuit Performance Signal Invalid.
- Common causes
- Common causes include Faulty Liftgate Control Switch-Interior, Liftgate Control Switch-Interior harness is open or shorted, Liftgate Control Switch-Interior circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B396C Chevrolet Description
The interior liftgate control switch has of a push button switch to command the liftgate to open and close. The liftgate module monitors the voltage level on the open/close signal circuit, when the switch is not being pressed the voltage level is at the system voltage. When the switch is pressed a contact within the interior liftgate control switch closes providing a ground path for the signal circuit causing the voltage level to drop to near zero volts. The liftgate module will detect the voltage drop and will then command the liftgate to open or close depending upon the current state of the liftgate at the time the switch is pressed.
The Diagnostic Trouble Code (DTC) sets when the liftgate control module detects an out of range condition in the mode switch signal circuit.
What are the Possible Causes of the DTC B396C Chevrolet?
- Faulty Liftgate Control Switch-Interior
- Liftgate Control Switch-Interior harness is open or shorted
- Liftgate Control Switch-Interior circuit poor electrical connection
- Faulty Liftgate Control Module
How to Fix the DTC B396C Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B396C Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B396C Chevrolet Code
1. What does the OBDII code B396C mean on a Chevrolet?
The B396C code indicates an issue with the liftgate mode switch circuit, specifically that the signal is invalid or outside of expected parameters.
2. What are the common symptoms of the B396C code?
Symptoms may include the liftgate not opening or closing properly, inconsistent operation of the liftgate switch, or a warning light on the dashboard.
3. What causes the B396C code to trigger?
Common causes include a faulty liftgate mode switch, damaged wiring or connectors in the liftgate circuit, or a malfunction in the liftgate control module.
4. How do I diagnose the B396C code?
Diagnosis involves inspecting the liftgate switch and wiring for damage, checking for proper voltage and ground signals, and using a scan tool to monitor liftgate circuit performance.
5. Can a bad liftgate mode switch cause the B396C code?
Yes, a faulty liftgate mode switch can send an invalid signal, which will trigger the B396C code.
6. How do I fix the B396C code on a Chevrolet?
Repairs may include replacing the liftgate mode switch, repairing damaged wiring or connectors, or reprogramming or replacing the liftgate control module.
7. Is the B396C code serious?
While it may not affect drivability, it can hinder the proper operation of the liftgate, which can be inconvenient and limit access to the cargo area.
8. Can a software update fix the B396C code?
In some cases, a software update for the liftgate control module may resolve the issue if it is caused by a programming error.
9. What tools are needed to troubleshoot the B396C code?
You will need a scan tool capable of reading body control module (BCM) codes, a multimeter for electrical testing, and possibly repair manuals for wiring diagrams.
10. Can I drive my Chevrolet with the B396C code active?
Yes, you can drive the vehicle, but the liftgate may not function properly, which could be inconvenient for loading or unloading cargo.
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