Pinpoint Test K: No Power in ACC - Vehicles With a Push Button Start System
Steering Column Switches
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 (Smart Junction Box) will then distribute power from circuit CDC33 (VT/GN) to SJB (Smart Junction Box) fuse 45 (5A), SJB (Smart Junction Box) fuse 43 (10A) and the microprocessor internal to the SJB (Smart Junction Box). The microprocessor monitors circuit CDC33 (VT/GN) for voltage. When voltage is present, the SJB (Smart Junction Box) will close the accessory delay relay, providing power to SJB (Smart Junction Box) fuse 41 (15A). The RFA (Remote Function Actuator) 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 (Smart Junction Box)
- RFA (Remote Function Actuator) 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.
K1 CHECK THE BATTERY
- Check the battery condition and charge.
Is the battery OK?
Yes
GO to K2.
No
CHARGE or INSTALL a new battery as necessary. TEST the system for normal operation.
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.
K3 CHECK THE IA (Intelligent Access) KEY FOB
- Ignition OFF.
- Place the IA (Intelligent Access) 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 (Intelligent Access) key fob or RFA (Remote Function Actuator) antenna concerns.
No
If ACCESSORY POWER ACTIVE is displayed in the message center, the IA (Intelligent Access) key fob battery may be weak. REFER to Antitheft and Alarm Systems to address IA (Intelligent Access) key fob concern.
If no messages are displayed, GO to K4.
K4 CHECK THE RFA (Remote Function Actuator) 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 (Remote Function Actuator) 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 (Remote Function Actuator) module self-test.
- Enter the following diagnostic mode on the scan tool: Self Test- All CMDTCs (Continuous Memory Diagnostic Trouble Codes).
Are any DTCs retrieved from the RFA (Remote Function Actuator) 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 (Remote Function Actuator) module DTCs, REFER to the Master DTC Chart in Body Control Systems. Master DTC Index
No
GO to K5.
K5 CHECK FOR POWER TO THE SJB (Smart Junction Box)
- Ignition OFF.
- Disconnect: SJB (Smart Junction Box) Fuse 45 (5A).
- Ignition In ACC.
- Measure the voltage between SJB (Smart Junction Box) fuse 45 (5A), input side and ground.
Is the voltage greater than 10 volts?
Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
No
GO to K6.
K6 CHECK THE IGNITION ACC CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: RFA (Remote Function Actuator) Module C2153B.
- Disconnect: SJB (Smart Junction Box) C2280A.
- Measure the resistance between SJB (Smart Junction Box) C2280A-3, circuit CDC33 (VT/GN), harness side and RFA (Remote Function Actuator) 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.
K7 CHECK FOR CORRECT RFA (Remote Function Actuator) MODULE OPERATION
- Disconnect all RFA (Remote Function Actuator) module connections.
- Check the connections for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all RFA (Remote Function Actuator) 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 (Remote Function Actuator) module.
CONFIGURE the new RFA (Remote Function Actuator) 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.
PROGRAM 2 Intelligent Access (IA) key fobs. REFER to Key Programming Using Diagnostic Equipment-Intelligent Access (IA) in Antitheft and Alarm Systems. 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.