2019 Dodge Charger

Powertrain Diagnostics & Repair / Engine / Starter / STARTING - NON-DTC BASED DIAGNOSTICS

DIAGNOSIS AND TESTING

NO CRANK (BCM EQUIPPED)

THEORY OF OPERATION
This vehicle is equipped with a KIN (Keyless Ignition Node) and Radio Frequency Hub (RF Hub). The KIN uses a Keyless Go Start/Stop push
button for cycling the ignition on/off.
When the operator presses the Start/Stop Button on a KIN, the FOBIK is validated wirelessly by the RF Hub (Radio Frequency Hub Module).
If the FOBIK is recognized as belonging to the vehicle and is inside the vehicle, the system allows the ignition state of the vehicle to be
changed by the operator between the LOCK, ACCESSORY, RUN, and START ignition states.
LED Operation

The LEDs in the IGNM and Start/Stop Button provide visual indication of the ignition system and button use to aid the driver. The Logic for
LED control is implemented in the RF HUB. The Start/Stop Button contain four LEDs:
OFF Indication
ACC Indication (Accessory)
ON Indication (On or Run)
Ignition Switch Indicator (button backlight)

The LEDs indicate the vehicle ignition position and are driven by the CAN bus signals related to the ignition position. The Center LED
(Ignition Switch Indicator) will blink if there is a related concern.
The RF HUB will log a DTC indicating an incorrect Ignition status value is present; in this state the ignition status is unknown. This will
continue until the correct signal is received by the RF Hub.
EVIC Operation

The Keyless Go feature requires the vehicle to be equipped with an EVIC display for prompts and status information. The display messages
are:
Service Keyless System
FOB Not Detected
FOB Left Vehicle
Not in Park
Push Brake Pedal and Push Button to Start
Push Clutch Pedal and Push Button to Start
Vehicle not in Park Warning

BCM/RF Hub Module Interaction

There are a few things that must take place before the starter relay can apply voltage to the starter. Below are some key points to check
when diagnosing a no crank condition.
The BCM requires two signals from the RF HUB to verify the ignition is in the run or start position. The voltage on the F20 circuit is one of
these signals. It can be monitored in both the RF HUB and BCM data display screens as the Ignition Run/Start under the "Sensor" value.
The run or start position voltage on this circuit should be at or close to Battery voltage.
Simultaneously the RF HUB busses the Ignition Run/Start status to the BCM. The BCM monitors the bussed input information as the
secondary verification on the Ignition Run/Start status. The bussed messages can be monitored with the scan tool in both the RF HUB and
BCM data display screens.
The F20 circuit voltage and the bussed ignition run/start status message received by the BCM must agree to enable starting. Once the
vehicle is started, the loss of only one ignition signal will not cause the vehicle to cycle off as long as the other feed still indicates a "run
status".
The RF HUB also requires an input from the Gated park switch (hardwired) and the OK to start CAN Bus message from the TCM (Crank
Enable).
Diagnostic Aids

NOTE: The No Crank Diagnostic serves as an aid in diagnosing the concern and is intended to be used as a general guide, since
each no crank condition can be unique.

The No Crank Diagnostic Test assumes all of the following to be true:

Communication to all configured modules in the vehicle is possible with the scan tool.
The condition is currently present.
The TCM, PCM, RF HUB, and BCM are at the latest calibration (part number) levels.
There are no active DTCs.
There are no applicable Recalls.
There are no applicable TSBs.
There are no PCM inhibits (i.e. RPM, Trans Range, Clutch).
The FOBIKs complete function and operation is correct.
All Battery cables and connections are clean and tight.
There are no open fuses.
The Battery is fully charged and can pass a load test from the GR8 tester.
The engine rotates freely.
Any aftermarket equipment/wiring that has been installed is operating correctly.

Starter Relay Operation

In a no crank condition the Starter Relay can be missing power or ground at pins 85 and 86, the 12 volt supply at pin 30, or output on pin 87.
Further explanation of how a relay operates is listed below:
Pin 30 is a constant B+ feed.
The Starter Relay coil is supplied power from the BCM and a controlled ground from the PCM to pins 85 and 86 to energize the relay
once the parameters for the Ignition Switch position and status, and all inhibit monitors (i.e. Clutch Switch, RPM, etc.) are satisfied.
While pins 85 and 86 are used to control the relay, which pin is supplied power and ground can vary between vehicles.

Refer to the specific wiring information for the vehicle being tested to properly test Starter Relay and circuitry.
Pin 87 is an output circuit to the Starter Solenoid. Once the relay control circuit is energized, the coil winding in the relay
magnetically pulls the internal switch closed. When the internal switch is closed the power at pin 30 is sent to pin 87 of the relay.

DIAGNOSTIC TEST

1. CHECK RF HUB AND KIN OPERATION

1. Press the ignition on.

NOTE: If the KIN does not advance Ignition status change from OFF, ACC, or RUN positions or FOB NOT DETECTED
Displayed in the EVIC, perform the FOB NOT DETECTED-POOR RKE OR REMOTE START RANGE diagnostic
procedure. Refer to FOB NOT DETECTED-POOR RKE OR REMOTE START RANGE
.

2. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
3. Record any Freeze Frame or Environmental Data related to the DTCs.
4. Repair any DTCs that may inhibit a no crank no start concern.
Is the vehicle still a no crank no start?
Yes

Go To

No

Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION
..

2. STARTER RELAY CHECK

 1. When attempting to start the vehicle, listen and if needed feel for a click at the starter relay in the PDC.

NOTE: Some starter relays are internal to a module and may not be accessible, making it more difficult to hear, or
feel the clicking response. It is possible for a poor ground or the Trans Range Sensor position to be lost
causing the starter to click once.

Did you hear an audible click at the relay or starter?

Yes

Go To

No

Go To

3. STARTER RELAY INPUT CHECK

1. Use a 12 volt test light/DVOM to check for power to the Starter Relay coil.
Is there Power to the relay coil?
Yes

Go To

No

Go To

4. BCM IGNITION STATUS

1. Using the scan tool, confirm the ignition switch status changes in the BCM under the data display screen for the "Bussed
Input" and "Sensor" values.

NOTE: The change of status in the BCM for the "Sensor" value validates the voltage activity (with very low
amperage) of the F20 circuit.

In the BCM, do both values for the ignition switch status match; and do they match those in the RF HUB?
Yes

Go To

No

If the status of the Ignition Switch position is not changing under the "Sensor" value, check the F20 circuit at the BCM
for battery voltage with a DVOM (not a test light).
If there is Battery voltage at the BCM on the F20 circuit
verify all power, ground and bus circuits are ok for the BCM. If
no problem found replace the BCM in accordance with Service Information. Refer to MODULE, BODY CONTROL,
REMOVAL
.
If there is NO
Battery voltage at the BCM
on the F20 circuit, then check for voltage on the F20 circuit at the RF HUB.
If there is Battery voltage coming out of the RF HUB on the F20 circuit
, check the F20 circuit between the RF HUB and
BCM for a short, open condition or high resistance.
If there is NO
Battery voltage coming out of the RF HUB on the F20 circuit
verify all power, ground & communication
circuits, & connections to the RF HUB prior to replacing. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL
.
In the data screen, if the status of the Ignition Switch was not changing under the "Bussed Input" value, further
diagnosis is needed between the RF HUB, (bus circuits, connections) and the BCM.

5. PCM IGNITION, TRANS RANGE/CLUTCH SWITCH STATUS VERIFICATION

1. Using the scan tool confirm there are no inhibits that have been triggered in the PCM (i.e. Ignition Switch, Trans Range or
Clutch Switch) and any switch inputs (filtered states) relating to the starting system function and operate correctly under the
data display screen.
Does the PCM show any inhibits (not DTCs
) for starting (not remote starting
)?
Yes

Correct the inhibit reason listed.

If no problem can be found, then verify all power, ground and bus circuits to the PCM and replace the PCM in
accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL
 No

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6. BCM TO STARTER RELAY POWER INPUT CHECK

1. At this time if all the correct inputs for the ignition switch status are correct in the RF HUB, BCM and PCM, verify both power
feeds are present (pin 30 and 85 or 86) to the Starter Relay while in the crank position.
Are both power feeds present at the relay when the ignition is in the crank position?
Yes

Go To

No

If, there is no power to pin 30 or 85/86, no DTCs, TSBs, Recalls, or Inhibits replace the BCM in accordance with Service
Information. Refer to MODULE, BODY CONTROL, REMOVAL
.

7. STARTER RELAY CONTROL CIRCUIT CHECK

1. Using a 12 volt test light/DVOM determine if the Starter Control circuit at the Starter Relay coil is missing ground (at the relay
if equipped with a removable relay or wiring to the internal relay) when the ignition is in the crank position.
Was the Starter Control circuit being grounded when the ignition was in the crank position?
Yes

Go To

No

Verify the Starter Relay Control circuit has no shorts, opens or high resistance on the wiring going from the Starter
Relay in the BCM (or PDC) to the PCM.
Verify the cables do not have excessive resistance by performing a voltage drop on the battery cables.

8. STARTER RELAY OUTPUT CIRCUIT CHECK

NOTE: At this point in the test, when the key is in the crank position power has been verified at Pin 30 and the relay coil,
along with the control circuit being grounded.

1. Remove the Starter Relay Output circuit connector from the Starter Solenoid.
2. Using a test light/DVOM and ignition in the crank position check for power at pin 87 (If equipped with a removable relay or
wiring to the internal relay) of the relay and at the connection to the starter.
Was there power at pin 87 for the output circuit?
Yes

Go To

No

If power is missing to pin 30 of the starter relay the BCM is suspect. Verify all power, ground, communication circuits
and connections to the BCM before replacing in accordance with service information.
If power is missing at pin 87 of the starter relay and the relay is replaceable, change out the relay and recheck the
concern. If a known good relay causes no change, check the Starter Output circuit from pin 87 of the relay to the
starter for an open, short, excessive resistance, or poor connections to the solenoid or starter.
Verify and Inspect the Starter to ensure it is free of corrosion, oil, and there is no damage, or binding conditions.
Verify that all wiring, cables and connections are clean and tight.

9. STARTER RELAY OUTPUT CIRCUIT LOAD TEST

1. Load test the Starter Relay output circuit going from the BCM to the Starter.
Does the starter relay output circuit pass the load test?
Yes

Verify that all connections are clean, tight and there is no damage to starter when fully inspected. If no problem found
then replace the Starter in accordance with Service Information.

No

Adjust the shift cable in accordance with the Service Information. Perform the POWERTRAIN VERIFICATION TEST.
Refer to POWERTRAIN VERIFICATION TEST, 3.6L
, POWERTRAIN VERIFICATION TEST, 5.7L
, POWERTRAIN
 VERIFICATION TEST, 6.2L
or POWERTRAIN VERIFICATION TEST, 6.4L
.

FOB NOT DETECTED-POOR RKE OR REMOTE START RANGE

THEORY OF OPERATION
The Radio Frequency Hub (RF HUB) uses LF Antennas and the internal RKE antenna or the Remote Start Antenna (RSA) (if equipped) to
locate the FOBIK either inside or outside of the vehicle for Keyless Go (KG) and Passive Entry (PE) functions. Once an input is activated to
the RF HUB, (door handle, trunk or liftgate handle or Keyless Ignition node (KIN), the RF HUB looks for the FOBIK on the LF Antennas and
then the FOBIK will send a signal to the RKE internal antenna or RSA with an encrypted message for the RF HUB. The encrypted message
will validate that the programmed FOBIK is correct for the vehicle and then carry out the Keyless Go or Passive Entry requests. The RF HUB
monitors the LF Antennas, Antenna circuits for shorts or opens. The RF HUB will also monitor the RSA for open circuit concerns.

DIAGNOSTIC TEST

1. CHECK FOR AN ACTIVE DTC

NOTE: Before performing this diagnostic test, ensure that there are no Aftermarket cell phone chargers, Aftermarket GPS
devices or any other aftermarket electronic equipment/devices that will cause LF interference miscommunication
between the LF Antennas and the Key Fob at 125 kHz. This will display a "FOB NOT DETECTED" message displayed
in the Cluster.

NOTE: To Press the ignition on the Passive Entry Keyless Go (PEKG)/Keyless Ignition Node (KIN) system, use the rounded
end of the Key Fob to press the Stop/Start button to advance ignition positions.

1. Press the ignition on.

2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, erase DTCs.
4. Press the ignition off.
5. Press the ignition on.
6. Wait 20 seconds.
7. With the scan tool, read the RF HUB DTCs.
Are there any DTCs present in the RF HUB?
Yes

Perform the appropriate RF HUB diagnostic test and recheck operation.

Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

No

Go To

2. VERIFY PROGRAMMED (LEARNED) KEY FOB FOR THE VEHICLE WITH THE SCAN TOOL
1. Ensure that the inoperative Key Fob is being used.
2. With the scan tool, select RF HUB, Misc Functions, and perform the "Key Fob Identification" routine.
Does the scan tool verify that the correct Key Fob is programmed (learned) to the vehicle?
Yes

Go To

No

Not Learned. The Key Fob being tested is already programmed to another vehicle.
Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

3. CHECK THE KEY FOB BATTERY

1. Remove the coin battery from the Key Fob.
2. With a voltmeter verify that the coin battery has the correct voltage.
Does the coin battery have the correct voltage?
 Yes

Go To

No

Replace the Key Fob battery and recheck operation.

Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

4. CHECK THE REMOTE START ANTENNA (RSA) (IF EQUIPPED)

1. Check the sales code of the vehicle's VIN number and see if the vehicle is equipped with Remote Start.
Is the vehicle equipped with Remote Start?
Yes

Go To

No

Go To

5. CHECK THE REMOTE START ANTENNA (RSA)

NOTE: You will need an assistant to perform the following resistance check of the RSA.

1. Disconnect the RSA harness connector from the RF HUB module.

2. Remove the RSA from the vehicle.
3. Disconnect the RSA from the coax cable.
4. Carefully place the RSA harness connector (RF HUB END) in a vice to hold the connector carefully in place.

NOTE: DO NOT over tighten the vice. Harness connector damage or connector distortion may occur.

5. Set the DVOM to Mega Ohms.

6. Connect one probe to the center terminal and the other to the outer shell of the coax cable.
7. With the help of an assistant, move the antenna cable up, down and side to side in order to stress the cable and rotate the
cable in it's own axis.

NOTE: Verify that the coax cable measurements do not get out of the spec range of 1.6 to 2.0 Mega Ohms.

Did the resistance of the coax cable go below the specified range of 1.6 to 2.0 Mega Ohms?
Yes

Replace the coax cable and the RSA and recheck operation.
Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

No

Go To

6. CHECK LF ANTENNAS
1. Verify that all LF Antennas are in the correct mounting locations on the vehicle.
2. Verify that all the LF Antennas are not blocked by any aftermarket metal shields or metal brackets that would inhibit locating
the Key Fob. (police vehicles and upfitted vehicles.)
Were there any LF Antenna concerns?
Yes

Repair the LF Antenna concern in accordance with the Service Information and recheck operation.
Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

No
 Replace the Radio Frequency Hub Module (RF HUB) in accordance with the Service Information and recheck
operation.
Perform the RADIO FREQUENCY HUB (RF-HUB) VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB)
VERIFICATION TEST
.

REMOTE START INOPERATIVE (BCM - RF HUB EQUIPPED)

THEORY OF OPERATION
The customer may notice that the signal range of the Remote Keyless Entry (RKE) system is reduced. This condition may be due to the RKE
antenna where the RKE key fob may need to be closer than 3 meters (10 feet) before the functions available on the key fob will operate.
The diagnostic test is provided as a diagnostic aid for the dealer technician.
It is necessary to confirm the correct sales code(s) are present in the Standard and Optional Equipment sections of DealerCONNECT to
determine if a factory or a Mopar Accessory Remote Start kit was installed. If the vehicle has a Mopar Accessory Remote Start kit, verify
that at least 20 minutes has elapsed since the sales codes were added to DealerCONNECT. Once it has been confirmed that the proper
sales codes have been added and the allotted time has passed, verify the vehicle has been configured properly using the scan tool. Also,
make sure that the system shows as enabled in the BCM and that the temporary remote start override is set to disabled.
For any further assistance on diagnosing the installed Mopar Accessory kit contact the Mopar Accessories group at 800-84-MOPAR
(66787).

DIAGNOSTIC TEST

1. REMOTE START FUNCTION

NOTE: In some cases the vehicle will start then stall, indicating a fuel level concern (less than a quarter of a tank). Before
proceeding verify there is enough fuel in the tank for the vehicle to start and run.

1. Attempt to Remote Start the vehicle with the FOB.

Does the vehicle start when using the FOB?
Yes

At this time the Remote Start is functioning properly.

With the scan tool, check for any related Starting, Communication, or Ignition related DTCs that may inhibit the
Remote Starting feature. Also, with the scan tool, check the BCM for any previous Remote Start Inhibit data in the
BCM.

NOTE: The last four Remote Start inhibit events are stored. With the scan tool, select an event to view or
select "Clear" to reset all inhibit event data.

No

Go To

2. REMOTE START VISUAL CHECK

1. While pressing the remote start button on the FOB, observe the exterior lights and the horn operation.
Does the horn sound and the exterior parking lights flash?
Yes

Go To

No

Go To

3. CHECKING BCM INHIBITS

NOTE: Since the horn sounds and the parking lights flash, this verifies the BCM is receiving the CAN BUS message from
the RF HUB. It also verifies the RF signal for Remote Start from the FOB to the RF HUB is operating correctly.

1. With the scan tool, check the Remote Start inhibits of the BCM or any ACTIVE DTCs listed in all modules.
 NOTE: With the scan tool, check the BCM for any previous Remote Start Inhibit data in the BCM. The fuel level may
not be a listed inhibit.

NOTE: The last four Remote Start Inhibit events are stored. Select an event to view or select "Clear" to reset all
inhibit event data.

Are there any Remote Start inhibits or any ACTIVE DTCs listed in the entire vehicle?
Yes

For any inhibits, correct the inhibit(s) that is causing the Remote Start not to work.
For any ACTIVE DTCs, perform the appropriate diagnostic procedure in DTC INDEX
.

No

Go To

4. FOB SIGNAL STRENGTH

1. Use the RF Tester 9001 to check the signal strength of the FOB.
Does the FOB pass?
Yes

Go To

No

Replace the battery in the FOB with a known good battery and recheck the signal from the FOB with the RF Tester
9001.
Check for any related TSBs prior to replacing the FOB. If no related TSBs are found, then replace the FOB in
accordance with the Service Information.

5. CHECK THE REMOTE START ANTENNA

1. Cycle the ignition off
2. Disconnect the Remote Start antenna from the RF Hub connector.
3. Replace the Remote Start Antenna (RSA) with a known good Antenna.
4. With the FOB, Remote Start the vehicle.
Did the vehicle start?
Yes

Replace the Remote Start Antenna in accordance with the Service Information.
Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST
.

No

Verify all powers, grounds, communication circuits, & connections to the RF HUB prior to replacing.
Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST
.

Created/Modified Date: 4/7/2020 7:40:17 PM