Dodge Ram Truck 1500-2500-3500. Manual — part 276

CABIN EQ MISMATCH (CONTINUED)

3.

FCM ACTIVE ON THE BUS CIRCUIT

With the DRBIII

T

, attempt to communicate with the FCM.

Are you able to communicate with the FCM?

Yes

>> Go To 4

No

>> Refer to the Communication Category for related symptoms/DTCs.

Perform BODY VERIFICATION TEST - VER 1.

4.

ACTIVE DTCS STORED IN THE FCM

With the DRBIII

T

, erase FCM DTCs.

Turn the ignition off.

Wait at least 10 seconds.

Turn the ignition on.

With the DRBIII

T

, read FCM DTCs.

Are any DTCs active present?

Yes

>> Refer to the symptom list for problems related to the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Replace the Front Control Module per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

8A - 106

AUDIO - SRT10 - AMP - ELECTRICAL DIAGNOSTICS

DR/DH

SOFTWARE CHECKSUM FAILURE

For the Audio Amplifier system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIA-
GRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on

•

Set Condition:
The Amplifier sets an internal software failure

Possible Causes

AMPLIFIER

1.

Amplifier

Turn the ignition on.

Turn the radio on.

With the DRBIII

T

, erase Amplifier DTCs.

With the DRBIII

T

, reset the Amplifier.

With the DRBIII

T

, read Amplifier DTCs.

Is the DTC: SOFTWARE CHECKSUM FAILURE
active at this time?

Yes

>> Replace the Amplifier in accordance

with the service information.

No

>> The conditions that caused this code to

set are not present at this time. Use the
wiring diagrams/schematics as a guide
to locate and inspect the related wiring
and connectors.

Perform BODY VERIFICATION TEST -
VER 1.

DR/DH

AUDIO - SRT10 - AMP - ELECTRICAL DIAGNOSTICS

8A - 107

BATTERY VOLTAGE LOW

For the Audio Amplifier system circuit diagram (Refer to 8 - ELECTRICAL/AUDIO - SCHEMATICS AND DIA-
GRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
If the module detects the battery voltage being less and 9.0 volts for greater than 1 second.

Possible Causes

BATTERY VOLTAGE LOW AT AMPLIFIER

CHARGING SYSTEM DTCS IN PCM

AMPLIFIER

1.

INTERMITTENT CONDITION

Cycle the ignition switch from on to off to on.

With the DRBIII

T

, read Amplifier DTCs.

Is the DTC active at this time?

Yes

>> Go To 2

No

>> The conditions that caused this code to

set are not present at this time. Use the
wiring diagrams/schematics as a guide
to locate and inspect the related wiring
and connectors.

Perform BODY VERIFICATION TEST -
VER 1.

2.

BATTERY VOLTAGE LOW AT AMPLIFIER

With the DRBIII

T

in Data Display, read the Amplifier battery voltage.

Is the voltage less than 9.0 volts?

Yes

>> Go To 3

No

>> Replace the Amplifier per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

8A - 108

AUDIO - SRT10 - AMP - ELECTRICAL DIAGNOSTICS

DR/DH

BATTERY VOLTAGE LOW (CONTINUED)

3.

CHARGING SYSTEM DTCS IN PCM

With the DRBIII

T

read PCM DTCs.

Are any Charging System related DTCs set in the PCM?

Yes

>> Diagnose and repair the DTCs using the Powertrain Diagnostic Manual.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Replace the Amplifier per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

DR/DH

AUDIO - SRT10 - AMP - ELECTRICAL DIAGNOSTICS

8A - 109