Pinpoint Test K: No Power In ACC - Vehicles With A Push Button Start System
Steering Column Switches
Pinpoint Tests
Pinpoint Test K: No Power in ACC - Vehicles With a Push Button Start System
Refer to Wiring Diagram Set 13, Power Distribution/SJB for schematic and connector information. Diagrams By Number
Normal Operation
To put the vehicle in ACC mode, the Intelligent Access (IA) key fob must be located inside the vehicle and the start/stop switch must be pressed for less than one second without applying the brake pedal. When in ACC mode, the Remote Function Actuator (RFA) module will send battery voltage to the Smart Junction Box (SJB) along circuit CDC33 (VT/GN). The SJB will then distribute power from circuit CDC33 (VT/GN) to SJB fuse 45 (5A), SJB fuse 43 (10A) and the microprocessor internal to the SJB. The microprocessor monitors circuit CDC33 (VT/GN) for voltage. When voltage is present, the SJB will close the accessory delay relay, providing power to SJB fuse 41 (15A). The RFA module monitors the voltage on circuit CDC33 (VT/GN). If circuit CDC33 (VT/GN), is open, shorted to ground or shorted to voltage, a DTC will be set. When the vehicle is in ACC mode, ACCESSORY POWER ACTIVE will be displayed in the message center.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- SJB
- RFA module
PINPOINT TEST K: NO POWER IN ACC - VEHICLES WITH A PUSH BUTTON START SYSTEM
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
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K1 CHECK THE BATTERY
- Check the battery condition and charge. Refer to Battery.
- Is the battery OK?
Yes
GO to K2.
No
CHARGE or INSTALL a new battery as necessary. REFER to Battery. TEST the system for normal operation.
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K2 CHECK THE MESSAGE CENTER DISPLAY
- Ignition In ACC.
- Note the message displayed in the message center.
- Does the message center display NO KEY DETECTED?
Yes
GO to K3.
No
If ACCESSORY POWER ACTIVE is displayed in the message center, the system is operating correctly at this time.
If there was no message displayed in the message center, GO to K4.
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K3 CHECK THE IA KEY FOB
- Ignition OFF.
- Place the IA key fob in the backup slot inside the center console. Refer to Driving in the Owner's Literature for more information.
- Ignition In ACC.
- Observe the message center display.
- Does the message center display NO KEY DETECTED?
Yes
REFER to Antitheft and Alarm Systems to address IA key fob or RFA antenna concerns.
No
If ACCESSORY POWER ACTIVE is displayed in the message center, the IA key fob battery may be weak. REFER to Antitheft and Alarm Systems to address IA key fob concern.
If no messages are displayed, GO to K4.
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K4 CHECK THE RFA MODULE FOR DTCs
- Ignition OFF.
- Connect the scan tool.
- NOTE: Once a scan tool session has been established, the scan tool will be able to communicate with the RFA module even if the push button starting system is not in the RUN mode.
- NOTE: The ignition must be OFF to carry out the RFA module self-test.
- Enter the following diagnostic mode on the scan tool: Self Test - All CMDTCs.
- Are any DTCs retrieved from the RFA module?
Yes
For DTCs B108A:11 and B108A:15, GO to Pinpoint Test G. Pinpoint Test G: DTCs B108A:11 And 15
For DTCs B10E7:11, B10E7:12 and B10E7:13, GO to Pinpoint Test H. Pinpoint Test H: DTCs B10E7:11, 12 And 13
For U3004:11, U3004:12 and U3004:13, GO to Pinpoint Test I. Pinpoint Test I: DTCs U3004:11, 12 And 13
For all other RFA module DTCs, REFER to the Master DTC Chart in Body Control Systems. Diagnostic Trouble Code (DTC) Chart
No
GO to K5.
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K5 CHECK FOR POWER TO THE SJB
- Ignition OFF.
- Disconnect: SJB Fuse 45 (5A).
- Ignition In ACC.
- Measure the voltage between SJB fuse 45 (5A), input side and ground.
- Is the voltage greater than 10 volts?
Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
GO to K6.
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K6 CHECK THE IGNITION ACC CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: RFA Module C2153B.
- Disconnect: SJB C2280A.
- Measure the resistance between SJB C2280A-3, circuit CDC33 (VT/GN), harness side and RFA module C2153B-4, circuit CDC33 (VT/GN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to K7.
No
REPAIR circuit CDC33 (VT/GN). TEST the system for normal operation.
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K7 CHECK FOR CORRECT RFA MODULE OPERATION
- Disconnect all RFA module connections.
- Check the connections for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all RFA module connections and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new RFA module. REFER to Body Control Systems.
CONFIGURE the new RFA module. REFER to Programmable Module Installation (PMI) in Information Bus. Programming and Relearning
CARRY OUT a Passive Anti-Theft System (PATS) Parameter Reset. REFER to Passive Anti-Theft System (PATS) Parameter Reset-Intelligent Access (IA) in Antitheft and Alarm Systems. With Intelligent Access (IA)
PROGRAM 2 Intelligent Access (IA) key fobs. REFER to Key Programming Using Diagnostic Equipment-Intelligent Access (IA) in Antitheft and Alarm Systems. With Intelligent Access (IA)
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. TEST the system for normal operation.
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