Dodge Dakota (ND). Manual — part 520
B1436-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT LOW
8T - 20
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
ND
B1436-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT LOW (CONTINUED)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on.
•
Set Condition:
The Hands Free Module detects voltage below 0.6 volts on the (X730) Voice Recognition/Phone Switch Signal
circuit.
Possible Causes
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO (X835) SENSOR GROUND
CIRCUIT
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO GROUND
INSIDE REARVIEW MIRROR
HANDS FREE MODULE
Diagnostic Test
1.
CHECK FOR ACTIVE DTCS
With the scan tool, read the active DTC’s.
Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per
cycle.
With the scan tool, read the active DTC’s.
Does the scan tool display this DTC as active?
Yes
>> Go To 2
No
>> If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness con-
nectors. Look for broken, bent, pushed out, or corroded terminals.
2.
CHECK THE VOLTAGE OF THE (X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL
Turn the ignition off.
Disconnect the Inside Rearview Mirror C2 harness connector.
Turn the ignition on.
With the scan tool, monitor the VR Phone Switch voltage.
Is the voltage above 4.7 volts?
Yes
>> Replace the Inside Rearview Mirror in accordance with the
service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Go To 3
ND
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 21
B1436-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT LOW (CONTINUED)
3.
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORT TO THE (X835) SENSOR
GROUND CIRCUIT
Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Measure the resistance between the (X730) Voice Recognition/Phone
Switch Signal circuit and the (X835) Sensor Ground circuit
Is the resistance below 100.0 ohms?
Yes
>> Repair the (X730) Voice Recognition/Phone Switch Signal
circuit for a short to the (X835) Sensor Ground circuit.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Go To 4
4.
(X730) VOICE RECOGNITION/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (X730) Voice Recog-
nition/Phone Switch Signal circuit.
Is the resistance below 100.0 ohms?
Yes
>> Repair the (X730) Voice Recognition/Phone Switch Signal
circuit for a short to ground
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Inspect the wiring and connectors for damage or shorted
circuits. If ok, replace and program the Hands Free Mod-
ule in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST - VER 1).
8T - 22
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
ND
B1437-VOICE RECOGNITION/PHONE SWITCH INPUT CIRCUIT HIGH
ND
NAVIGATION/TELECOMMUNICATION - ELECTRICAL DIAGNOSTICS
8T - 23
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