Starting System
Diagnostic Routine E
Diagnostic Overview
C113A:11, C113A:15
Refer to Wiring Diagram Set 112 for schematic and connector information Electrical Diagrams.
Normal Operation and Fault Conditions
The wake up control circuit is used to wake up the PCM (Powertrain Control Module) prior to engine cranking. The PCM (Powertrain Control Module) needs to wake up prior to a crank request so that it has time to go through its own initialization. The wake up control circuit also powers the PATS (Passive Anti-Theft System) transceiver (if equipped). The wake up control circuit is controlled by the BCM (Body Control Module) and receives voltage from the BJB (Battery Junction Box). The wake up control circuit is FET (Field-Effect Transistor) protected. REFER to Field Effect Transistor (FET) Protection .
The BCM (Body Control Module) activates the wake-up control circuit when:
- the driver door is opened.
- a remote start request is received (if equipped with factory remote start).
- the brake pedal is pressed.
- a key is inserted into the ignition (without IA (Intelligent Access))
- the ignition is in the RUN or START position.
- the start/stop switch is pressed (with IA (Intelligent Access))
DTC Fault Trigger Conditions
Visual Inspection and Diagnostic Pre-checks
- Inspect BCM (Body Control Module) fuse 18 (10A).
Pinpoint Test
1. RETRIEVE BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)
1. Ignition ON.
2. Using a scan tool, perform the BCM (Body Control Module) self-test.
Is DTC (Diagnostic Trouble Code) C113A:15 retrieved?
2. CHECK THE WAKE UP CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Ignition OFF.
2. Disconnect: PATS (Passive Anti-Theft System) Transceiver (for vehicles without IA (Intelligent Access) only).
3. Disconnect: BCM (Body Control Module) C2280F.
4. Disconnect: PCM (Powertrain Control Module) C1381B (2.0L) or PCM (Powertrain Control Module) C175B (3.5L).
5. Ignition ON.
6. For 2.0L, measure:
7. For 3.5L, measure:
Is any voltage present?
3. CHECK THE WAKE UP CONTROL CIRCUIT FOR AN OPEN
1. Ignition OFF.
2. For 2.0L, measure:
3. For 3.5L, measure:
Is the resistance less than 3 ohms?
4. CHECK THE BCM (Body Control Module) AND PCM (Powertrain Control Module) FOR CORRECT OPERATION
1. Connect: BCM (Body Control Module) C2280F.
2. Ignition ON.
3. For 2.0L, measure:
4. For 3.5L, measure:
Is the voltage greater than 11 volts?
5. CHECK THE WAKE UP CONTROL CIRCUIT FOR AN OPEN
1. Ignition OFF.
2. Measure:
Is the resistances less than 3 ohms?
6. CHECK THE BCM (Body Control Module) FOR CORRECT OPERATION
1. Connect: BCM (Body Control Module) C2280F.
2. Ignition ON.
3. Measure:
Is the voltage greater than 11 volts?
7. CHECK THE WAKE UP CONTROL CIRCUIT DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)
1. Using a scan tool, clear the BCM (Body Control Module) CMDTCs (Continuous Memory Diagnostic Trouble Codes).
2. Ignition OFF.
3. Disconnect: PATS (Passive Anti-Theft System) Transceiver (for vehicles without IA (Intelligent Access) only).
4. Disconnect: PCM (Powertrain Control Module) C1381B (2.0L) or PCM (Powertrain Control Module) C175B (3.5L).
5. Ignition ON.
6. Using a scan tool, perform the PCM (Powertrain Control Module) self-test.
Was DTC (Diagnostic Trouble Code) C113A:11 retrieved on-demand during self-test?
8. CHECK THE WAKE UP CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Ignition OFF.
2. Disconnect: BCM (Body Control Module) C2280F.
3. For 2.0L, measure:
4. For 3.5L, measure:
Is the resistance to ground greater than 10,000 ohms?
9. CHECK THE PCM (Powertrain Control Module) FOR CORRECT OPERATION
1. Using a scan tool, clear the BCM (Body Control Module) CMDTCs (Continuous Memory Diagnostic Trouble Codes).
2. Ignition OFF.
3. Connect: PCM (Powertrain Control Module) C1381B (2.0L) or PCM (Powertrain Control Module) C175B (3.5L).
4. Ignition ON.
5. Using a scan tool, perform the BCM (Body Control Module) self-test.
Was DTC C113A:11 retrieved on-demand during self-test?
10. CHECK FOR CORRECT BCM (Body Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all BCM (Body Control Module) connectors.
3. Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
4. Reconnect the BCM (Body Control Module) connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
11. CHECK FOR CORRECT PCM (Powertrain Control Module) OPERATION
1. Ignition OFF.
2. Disconnect and inspect all PCM (Powertrain Control Module) connectors.
3. Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
4. Reconnect the PCM (Powertrain Control Module) connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
Is the concern still present?
