B297B
DTC B297B or B297C
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC B297B 5A
- Driver Door Open Switch Circuit Not Plausible
DTC B297C 5A
- Passenger Door Open Switch Circuit Not Plausible
Diagnostic Fault Information
Circuit/System Description
The Keyless Entry Control Module provides a 12V signal to the driver and passenger door open switch signal circuits. The driver window motor provides a 12V signal to the driver door ajar switch signal circuit. The passenger window switch provides a 12V signal to the passenger door ajar switch signal circuit. The door open switches and the door ajar switches are integral to each Door Latch Assembly.
The door open switch and the door ajar switch contacts will be open with the door is fully closed, the door switches within the door latch are designed so that the when the door is ajar, the contact in the door ajar switch closes , the voltage is pulled low and the window motor will then send a serial data message to the BCM indicating that the door is ajar. When the door is opened further, the contact in the door open switch will then close providing a ground for the door open signal circuit, the Keyless Entry Control Module will then detect that the door is open.
Conditions for Running the DTC
Battery voltage is between 9-16 V.
Conditions for Setting the DTC
B297B 5A
* The Keyless Entry Control Module detects the driver door open switch is Active while receiving a serial data message from the BCM that the driver door ajar switch is Inactive.
* The condition must be present for greater than 2 seconds
B297C 5A
* The Keyless Entry Control Module detects the passenger door open switch is Active while receiving a serial data message from the BCM that the passenger door ajar switch is Inactive.
* The condition must be present for greater than 2 seconds.
Action Taken When the DTC Sets
B297B 5A
The Keyless Entry Control Module ignores the inputs from the driver exterior door handle switch.
B297C 5A
The Keyless Entry Control Module ignores the inputs from the passenger exterior door handle switch.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the Keyless Entry Control Module receives a serial data message from the BCM that the door is ajar before the Keyless Entry Control Module detects the door open switch is active, then the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views Outside Rearview Mirror - Driver
Description and Operation
Steering Wheel and Column Description and Operation Description and Operation
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the scan tool Body Control Module Driver Door Ajar Switch parameter changes between Inactive and Active when opening and closing the driver door.
• If the parameter does not change
Refer to Door Ajar Indicator Malfunction Door Ajar Indicator Malfunction
• If the parameter changes
3. Verify the scan tool Keyless Entry Control Module Driver Door Ajar Switch parameter changes between Inactive and Active when opening and closing the driver door.
• If the parameter does not change
Refer to Circuit/System Testing
• If the parameter changes
4. Verify the scan tool Body Control Module Passenger Door Ajar Switch parameter changes between Inactive and Active when opening and closing the passenger door.
• If the parameter does not change
Refer to Door Ajar Indicator Malfunction Door Ajar Indicator Malfunction
• If the parameter changes
5. Verify the scan tool Keyless Entry Control Module Passenger Door Ajar Switch parameter changes between Inactive and Active when opening and closing the passenger door.
• If the parameter does not change
Refer to Circuit/System Testing
• If the parameter changes
6. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate A23 Door Latch Assembly. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal listed below and ground:
* A23D Door Latch Assembly-Driver - ground circuit terminal 8
* A23P Door Latch Assembly-Passenger - ground circuit terminal 3
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Ignition ON.
4. Verify the scan tool Door Ajar Switch parameter is Inactive.
• If not Inactive
1. Ignition OFF, disconnect the harness connector at the K84 Keyless Entry Control Module.
2. Test for infinite resistance between the signal circuit terminal listed below and ground.
* A23D Door Latch Assembly-Driver - signal circuit terminal 7
* A23P Door Latch Assembly-Passenger - signal circuit terminal 2
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K84 Keyless Entry Control Module.
• If Inactive
5. Install a 3 A fused jumper wire between the circuit terminals listed below and ground.
* A23D Door Latch Assembly-Driver - signal circuit terminal 7
* A23P Door Latch Assembly-Passenger - signal circuit terminal 2
6. Verify the scan tool Door Ajar Switch parameter is Active.
• If not Active
1. Ignition OFF, disconnect the harness connector at the K84 Keyless Entry Control Module, ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K84 Keyless Entry Control Module.
• If Active
7. Test or replace the A23 Door Latch Assembly.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the appropriate A23 Door Latch Assembly.
2. With the door in the closed position, test for infinite resistance between the signal and the ground terminals listed below:
* A23D Door Latch Assembly-Driver - signal terminal 7 and ground terminal 8
* A23P Door Latch Assembly-Passenger - signal terminal 2 and ground terminal 3
• If not the specified value, replace the A23 Door Latch Assembly.
3. With the door in the open position, test for less than 5 ohms between the signal and the ground terminals listed below:
* A23D Door Latch Assembly-Driver - signal terminal 7 and ground terminal 8
* A23P Door Latch Assembly-Passenger - signal terminal 2 and ground terminal 3
• If greater than the specified range, replace the A23 Door Latch Assembly.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Front Side Door Lock Replacement Front Side Door Lock Replacement
* Control Module References Control Module References for Keyless Entry Control Module replacement, programming and setup