Dodge Ram Truck 1500-2500-3500. Manual — part 1825

5 VOLT OVER VOLTAGE (CONTINUED)

6.

(T313) 5 VOLT MODE SENSOR SUPPLY CIRCUIT SHORTED TO (T315) SHIFT MOTOR CONTROL A
CIRCUIT

Measure the resistance between the (T313) 5 Volt Mode Sensor Sup-
ply circuit in the Motor/Mode Sensor C2 harness connector and the
(T315) Shift Motor Control A circuit in the Shift Motor/Mode Sensor C1
harness connector.

Is the resistance below 5.0 ohms between the 5 Volt Supply cir-
cuit and the Shift Motor Control circuit?

Yes

>> Repair the 5 Volt Supply circuit for short to the Shift Motor

Control circuit.

Perform TRANSFER CASE VERIFICATION TEST. (Refer
to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE
- DIAGNOSIS AND TESTING)

No

>> Go To 7

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TRANSFER CASE - ELECTRICAL DIAGNOSTICS (ETC)

DR/DH

5 VOLT OVER VOLTAGE (CONTINUED)

7.

(T313) 5 VOLT MODE SENSOR SUPPLY CIRCUIT SHORTED TO (T316) SHIFT MOTOR CONTROL B
CIRCUIT

Measure the resistance between the (T313) 5 Volt Mode Sensor Sup-
ply circuit in the Motor/Mode Sensor C2 harness connector and the
(T316) Shift Motor Control B circuit in the Shift Motor/Mode Sensor C1
harness connector.

Is the resistance below 5.0 ohms between the 5 Volt Supply cir-
cuit and the Shift Motor Control circuit?

Yes

>> Repair the 5 Volt Supply circuit for short to the Shift Motor

Control circuit.

Perform TRANSFER CASE VERIFICATION TEST. (Refer
to 21 - TRANSMISSION/TRANSAXLE/TRANSFER CASE
- DIAGNOSIS AND TESTING)

No

>> Go To 8

8.

TRANSFER CASE CONTROL MODULE

Using the wiring diagram as a guide, inspect the wiring and connectors relative to this DTC. Inspect all power and
ground circuits. Repair as necessary.

If there are no Charging System related DTCs or other possible causes remaining, view repair.

Repair

Replace the Transfer Case Control Module.

Perform TRANSFER CASE VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/
TRANSFER CASE - DIAGNOSIS AND TESTING)

9.

INTERMITTENT WIRING AND CONNECTORS

The conditions necessary to set this DTC are not present at this time.

Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.

Wiggle test the wiring harness and connectors while checking for shorted and open circuits.

Using the DRBIII

T

, monitor the data related to this circuit while performing the wiggle test. Look for the data to

change or for the DTC to reset.

Were there any problems found?

Yes

>> Repair as necessary.

Perform TRANSFER CASE VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/
TRANSFER CASE - DIAGNOSIS AND TESTING)

No

>> Test Complete.

DR/DH

TRANSFER CASE - ELECTRICAL DIAGNOSTICS (ETC)

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5 VOLT UNDER VOLTAGE

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TRANSFER CASE - ELECTRICAL DIAGNOSTICS (ETC)

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5 VOLT UNDER VOLTAGE (CONTINUED)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
Continuously with the ignition on.

•

Set Condition:
The Transfer Case Control Module detects the 5 Volt Supply circuit voltage drops below 4.0 volts for 2 sec-
onds.

Possible Causes

INTERMITTENT 5 VOLT UNDER VOLTAGE

(T322) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

(T322) 5 VOLT SELECTOR SWITCH SUPPLY CIRCUIT SHORT TO GROUND

(T313) 5 VOLT MODE SENSOR SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

(T313) 5 VOLT MODE SENSOR SUPPLY CIRCUIT SHORT TO GROUND

TRANSFER CASE SELECTOR SWITCH

SHIFT MOTOR/MODE SENSOR ASSEMBLY

TRANSFER CASE CONTROL MODULE

1.

5 VOLT UNDER VOLTAGE DTC PRESENT

With the DRBIII

T

, read Transfer Case DTCs. Record all DTC information.

With the DRBIII

T

, erase Transfer Case DTCs.

Start the engine and cycle the Transfer Case Selector Switch through all positions.

With the DRBIII

T

, read Transfer Case DTCs.

Does the DRBIII

T

display 5 VOLT UNDER VOLTAGE?

Yes

>> Go To 2

No

>> Go To 11

2.

(T313) 5 VOLT MODE SENSOR SUPPLY CIRCUIT VOLTAGE
BELOW 4.0 VOLTS

Ignition on, engine not running.

Measure the voltage of the (T313) 5 Volt Mode Sensor Supply circuit
by backprobing the Shift Motor/Mode Sensor harness connector.

Is the voltage below 4.0 volts?

Yes

>> Go To 3

No

>> Go To 6

DR/DH

TRANSFER CASE - ELECTRICAL DIAGNOSTICS (ETC)

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