Pinpoint Test I: The Ambient Lighting Is Inoperative
Interior Lighting
Pinpoint Tests
Pinpoint Test I: The Ambient Lighting Is Inoperative
Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information. Diagrams By Number
Normal Operation
The ambient lighting module supplies voltage and ground to the LEDs located in the floor console cup holders and the front and rear footwells. The ambient lighting switch is used to cycle through the 7 color combinations or to turn the ambient lighting feature off. There are 3 different color (red, blue and green) LEDs housed within each LED assembly.
When the ignition key is in the RUN or ACC position, the ambient lighting switch and the ambient lighting module receives voltage through circuit CBX07 (GN/RD). Ground for the ambient lighting module is provided through circuit GD908 (BK). When the ambient lighting switch is pressed, voltage is routed to the ambient lighting module through circuit CLN54 (BN/YE), indicating a request for the module to cycle the ambient lighting to the next setting.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Ambient lighting harness
- Ambient lighting switch
- Ambient lighting module
PINPOINT TEST I: THE AMBIENT LIGHTING IS INOPERATIVE
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
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I1 CHECK CIRCUIT CBX07 (GN/RD) FOR AN OPEN (TO AMBIENT LIGHTING MODULE)
- Ignition OFF.
- Disconnect: Ambient Lighting Module C3347.
- Ignition ON.
- Measure the voltage between the ambient lighting module C3347-1, circuit CBX07 (GN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to I2.
No
VERIFY the SJB fuse 7 (10A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.
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I2 CHECK THE INPUT FROM CIRCUIT CLN54 (BN/YE)
- While pressing and releasing the ambient lighting switch, measure the voltage between the ambient lighting module C3347-2, circuit CLN54 (BN/YE), harness side and ground.
- Is the voltage greater than 10 volts with the switch pressed and 0 volts with the switch released?
Yes
GO to I3.
No
If voltage is always present, GO to I4.
If no voltage is present, GO to I5.
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I3 CHECK CIRCUIT GD908 (BK) FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the ambient lighting module C3347-8, circuit GD908 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to I7.
No
REPAIR the circuit. TEST the system for normal operation.
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I4 CHECK CIRCUIT CLN54 (BN/YE) FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Ambient Lighting Switch C3348.
- Ignition ON.
- Measure the voltage between the ambient lighting module C3347-2, circuit CLN54 (BN/YE), harness side and ground.
- Is any voltage present?
Yes
REPAIR the circuit. TEST the system for normal operation.
No
INSTALL a new ambient lighting switch. REFER to Ambient Lighting Switch Service and Repair. TEST the system for normal operation.
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I5 CHECK CIRCUIT CBX07 (GN/RD) FOR AN OPEN (TO AMBIENT LIGHTING SWITCH)
- Ignition OFF.
- Connect: Ambient Lighting Module C3347.
- Disconnect: Ambient Lighting Switch C3348.
- Ignition ON.
- Measure the voltage between the ambient lighting switch C3348-2, circuit CBX07 (GN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to I6.
No
REPAIR the circuit. TEST the system for normal operation.
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I6 CHECK THE AMBIENT LIGHTING SWITCH
- Connect and remove a fused jumper wire between the ambient lighting switch C3348-2, circuit CBX07 (GN/RD), harness side and the ambient lighting switch C3348-6, circuit CLN54 (BN/YE), harness side.
- Do the ambient LEDs illuminate and cycle through a color change each time the jumper wire is connected and removed?
Yes
REMOVE the jumper wire. INSTALL a new ambient lighting switch. REFER to Ambient Lighting Switch Service and Repair. TEST the system for normal operation.
No
REMOVE the jumper wire. REPAIR circuit CLN54 (BN/YE) for an open. TEST the system for normal operation.
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I7 CHECK THE AMBIENT LIGHTING HARNESS
- Ignition OFF.
- Check any of the diode circuits between the ambient lighting module, harness side as follows:
- Does the meter indicate the circuit is good?
Yes
GO to I8.
No
REPAIR or INSTALL a new ambient lighting harness. TEST the system for normal operation.
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I8 CHECK FOR CORRECT AMBIENT LIGHTING MODULE OPERATION
- Disconnect the ambient lighting module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ambient lighting module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new ambient lighting module. REFER to Ambient Lighting Module Service and Repair. TEST the system for normal operation.
If the concern is still present, INSTALL the original ambient lighting module. INSTALL a new ambient lighting harness. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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