DTC B297B or B297C
| DTC B297B or B297C |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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 | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Driver Door Open Switch Signal | B297B 5A | B297B 5A | B297B 5A | - |
| Passenger Door Open Switch Signal | B297C 5A | B297C 5A | B297C 5A | - |
| Driver Door Latch Ground | - | 1 | - | - |
| Passenger Door Latch Ground | - | 1 | - | - |
| 1. Ajar Indicator Malfunction | ||||
| Circuit/System Description |
The keyless entry control module supplies a 12V signal to the driver and passenger door open switch signal circuits. The driver window motor supplies a 12V signal to the driver door ajar switch signal circuit. The passenger window switch supplies 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 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
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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.
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The condition must be present for greater than 2 seconds
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B297C 5A
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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.
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The condition must be present for greater than 2 seconds.
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| 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 |
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The DTC will be current for as long as the fault is present.
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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.
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A history DTC will clear after 50 ignition cycles.
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| Reference Information |
Schematic Reference
Door Lock/Indicator Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Door Locks Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Ignition ON, observe the scan tool BCM Driver Door Ajar Switch parameter while opening and closing the driver door. The parameter should change between Active and Inactive.
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| 2. |
If the value does not change, refer to Driver Door Ajar Switch Malfunction.
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| 3. |
Observe the scan tool keyless entry control module Driver Door Open Switch parameter while opening and closing the driver door. The parameter should change between Active and Inactive.
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| 4. |
If the value does not change, refer to Driver Door Open Switch Malfunction.
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| 5. |
Observe the scan tool BCM Passenger Door Ajar Switch parameter while opening and closing the passenger door. The parameter should change between Active and Inactive.
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| 6. |
If the value does not change, refer to Passenger Door Ajar Switch Malfunction.
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| 7. |
Observe the scan tool keyless entry control module Passenger Door Open Switch parameter while opening and closing the passenger door. The parameter should change between Active and Inactive.
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| 8. |
If the value does not change, refer to Passenger Door Open Switch Malfunction.
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| Circuit/System Testing |
Driver Door Ajar Switch Malfunction
| 1. |
Ignition OFF, disconnect the harness connector at the A23D door latch assembly - driver.
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| 2. |
Test for less than 10 Ω between the ground circuit terminal 8 and ground.
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| 3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 4. |
Ignition ON, verify the scan tool BCM Driver Door Ajar Switch parameter is Inactive.
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| 5. |
If not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the M74D window motor - driver.
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| 6. |
Install a 3 A fused jumper wire between the signal circuit terminal 6 and ground. Verify the scan tool BCM Driver Door Ajar Switch parameter is Active.
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| 7. |
If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the M74D window motor - driver.
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| 8. |
If all circuits test normal, test or replace the A23D door latch assembly - driver.
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Driver Door Open Switch Malfunction
| 1. |
Ignition OFF, disconnect the harness connector at the A23D door latch assembly - driver.
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| 2. |
Ignition ON, verify the scan tool keyless entry control module Driver Door Open Switch parameter is Inactive.
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| 3. |
If not the specified value, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, replace the K84 keyless entry control module.
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| 4. |
Install a 3 A fused jumper wire between the signal circuit terminal 7 and ground. Verify the scan tool keyless entry control module Driver Door Open Switch parameter is Active.
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| 5. |
If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
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| 6. |
If all circuits test normal, test or replace the A23D door latch assembly - driver
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Passenger Door Ajar Switch Malfunction
| 1. |
Ignition OFF, disconnect the harness connector at the A23P door latch assembly - passenger.
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| 2. |
Test for less than 10 Ω between the ground circuit terminal 3 and ground.
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| 3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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| 4. |
Ignition ON, verify the scan tool BCM Passenger Door Ajar Switch parameter is Inactive.
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| 5. |
If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the M74P window motor - passenger.
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| 6. |
Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground. Verify the scan tool BCM Passenger Door Ajar Switch parameter is Active.
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| 7. |
If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the M74P window motor - passenger.
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| 8. |
If all circuits test normal, test or replace the A23P door latch assembly - passenger.
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Passenger Door Open Switch Malfunction
| 1. |
Ignition OFF, disconnect the harness connector at the A23P door latch assembly - passenger.
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| 2. |
Ignition ON, verify the scan tool keyless entry control module Passenger Door Open Switch parameter is Inactive.
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| 3. |
If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K84 keyless entry control module.
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| 4. |
Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool keyless entry control module Passenger Door Open Switch parameter is Active.
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| 5. |
If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
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| 6. |
If all circuits test normal, test or replace the A23P door latch assembly - passenger
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| Component Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the appropriate A23 door latch assembly.
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| 2. |
With the switch in the open position, test for infinite resistance between the signal terminal and ground terminal listed below:
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A23D door latch assembly - driver signal terminal 6 and ground terminal 8
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A23D door latch assembly - driver signal terminal 7 and ground terminal 8
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A23P door latch assembly - passenger signal terminal 1 and ground terminal 3
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A23P door latch assembly - passenger signal terminal 2 and ground terminal 3
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| 3. |
If not the specified value, replace the A23 door latch assembly
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| 4. |
With the switch in the closed position, test for less than 5 Ω between the signal terminal and ground terminal listed below:
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A23D door latch assembly - driver signal terminal 6 and ground terminal 8
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A23D door latch assembly - driver signal terminal 7 and ground terminal 8
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A23P door latch assembly - passenger signal terminal 1 and ground terminal 3
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A23P door latch assembly - passenger signal terminal 2 and ground terminal 3
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| 5. |
If greater than the specified range, replace the A23 door latch assembly
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Front Side Door Lock Replacement
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Control Module References
for BCM and keyless entry control module replacement, setup and programming
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