Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B2652 00: Passenger Compartment Dimming 3Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
I/P DImming Voltage Reference | B1395 03 or B3600 03 | B1395 03, B2652 00 or B3600 03 | B1395 07 | -- |
Courtesy Lamp Voltage Reference | B2615 00 or B2615 02 | B2615 00 or B2615 04 | B2615 00 or B2615 01 | -- |
LED Dimming Voltage Reference | B2610 00 or B2610 02 | B2610 00 or B2610 04 | B2610 00 or B2610 01 | -- |
LED Indicator Dimming Volage Reference | B2625 00 | B2625 00 | B2625 00 | -- |
Dome Lamp Switch Signal | 2 | 2 | 2 | -- |
Left Front Door Open Switch Signal | 3 | 3 | 3 | -- |
Left Rear Door Open Switch Signal | 4 | 4 | 4 | -- |
Right Front Door Open Switch Signal | 3 | 3 | 3 | -- |
Right Rear Door Open Switch Signal | 4 | 4 | 4 | -- |
Stop Lamp Switch Signal | B1395 03 or B3600 03 | -- | -- | -- |
Dome/Reading Lamp Control | B2615 00 | B2615 00 | -- | -- |
Dome/Reading Lamp Supply Voltage | 1 | 1 | -- | -- |
Exterior Lamps Illumination Supply Voltage | 5 | 5 | 5 | -- |
Inadvertent Power Control | 5 | 5 | 5 | -- |
I/P Lamps Dimming Control | B2652 00 | B2652 00 | B2652 00 | -- |
Dome/Reading Lamp Low Control - Driver Door | -- | 1 | -- | -- |
Dome/Reading Lamp Low Control - Passenger Door | -- | 1 | -- | -- |
Exterior Lamps Low Reference | -- | 5 | -- | -- |
I/P Dimmer Switch Ground | -- | 2 | -- | -- |
LH Vanity Mirror Courtesy Lamp Ground | -- | 1 | -- | -- |
Overhead Console Courtesy Lamp Ground | -- | 1 | -- | -- |
Rear Dome Lamp Ground | -- | 1 | -- | -- |
RH Vanity Mirror Courtesy Lamp Ground | -- | 1 | -- | -- |
| ||||
Circuit/System Description
The body control module (BCM) applies a 12-volt reference voltage through the headlamp and panel dimmer switch 12-volt reference circuit to the headlamp and panel dimmer switch. When the dimming switch is placed in the desired position, the dimmed voltage setting is applied from the headlamp and panel dimmer switch through the instrument panel (I/P) lamp dimming switch signal circuit to the BCM. The BCM then applies the dimmed voltage to the I/P lamp dimming control circuit and the components on the circuit.
Conditions for Running the DTC
| • | Battery voltage must be between 9-16 volts. |
| • | The ignition must be ON. |
Conditions for Setting the DTC
The BCM receives an open, voltage, or ground signal on the I/P lamp dimming control circuit.
Action Taken When the DTC Sets
The I/P lamps are not illuminated.
Conditions for Clearing the DTC
| • | The conditions for setting the DTC are no longer present. |
| • | A history DTC clears after 100 malfunction-free ignition cycles. |
| • | The BCM receives the clear code command from the scan tool. |
Reference Information
Schematic Reference
Interior Lights Dimming Schematics
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate component.
- Ignition OFF, verify that a test lamp illuminates between the listed ground circuit terminal and B+.
- Connect a test lamp between the listed backlighting control circuit terminal and ground.
- Command the Dimming Test high to low with a scan tool. The test lamp should turn from bright to dim when changing between the commanded states.
- If all circuits test normal, test or replace the appropriate component.
| • | Rear window switch terminal F |
| • | Headlamp switch terminal 8 |
| • | Transfer case shift control switch terminal 6 |
| • | Sunroof switch terminal 5 |
| • | Folding seat switch terminal 4 |
| • | Power liftgate open/close switch terminal C |
| • | CJ3 HVAC control module terminal 2 |
| ⇒ | If the test lamp does not illuminate, test the ground circuit for an open/high resistance. |
| • | Rear window switch terminal B |
| • | Headlamp switch terminal 7 |
| • | Transfer case shift control switch terminal 5 |
| • | Sunroof switch terminal 3 |
| • | Folding seat switch terminal 5 |
| • | Power liftgate open/close switch terminal B |
| • | CJ3 HVAC control module terminal 1 |
| ⇒ | If the test lamp is always OFF, test the control circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always bright, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
