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Contents Wiring diagrams Section: Communication Devices All sections

Cellular Systems, Entertainment Systems & Navigation Systems - Electrical Diagnostics: Other Dodge Nitro I

Communication Devices 23 illustrations ~4123 words

Monitor Conditions

  1. When Monitored: With the ignition on.

Set Conditions

  1. Set Condition: The Hands Free Module detects a fault in any of the microphone circuits.

Possible Causes

Possible Causes
(X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO GROUND
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 127

Scheme 127: Diagnostic Test
Scheme 127: Diagnostic Test

Scheme 128

Scheme 128
Scheme 128
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror C2 harness connector. Turn the ignition on. With the scan tool, read the DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Hands Free Module harness connector. Measure the resistance between ground and the (X712) Microphone 1 circuit. Is the resistance below 10K ohms? Yes Repair the (X712) Microphone 1 circuit for short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 129

Scheme 129: Circuit Schematic
Scheme 129: Circuit Schematic
  1. When Monitored: With the ignition on.
  1. Set Condition: The Radio detects a fault in any of the microphone circuits.
Possible Causes
(X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO GROUND
INSIDE REARVIEW MIRROR
RADIO

Scheme 130

Scheme 130: Diagnostic Test
Scheme 130: Diagnostic Test

Scheme 131

Scheme 131
Scheme 131
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Radio C1 harness connector. Measure the resistance between ground and the (X712) Microphone 1 circuit. Is the resistance below 10K ohms? Yes Repair the (X712) Microphone 1 circuit for short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Radio in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault in any of the microphone circuits.
Possible Causes
(X712) MICROPHONE 1 IN (+) CIRCUIT OPEN
(X712) MICROPHONE 1 IN (+) CIRCUITS SHORTED TO VOLTAGE
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 132

Scheme 132
Scheme 132

Scheme 133

Scheme 133
Scheme 133
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X712) MICROPHONE CIRCUITS SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Hands Free Module harness connector. Turn the ignition on. Measure the voltage of the (X712) Microphone circuit. Is the voltage above 1.0 volt? Yes Repair the (X712) Microphone circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 4 .
  4. (X712) MICROPHONE 1 IN (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (X712) Microphone 1 IN (+) circuit between the HFM connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X712) Microphone 1 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Radio detects a fault in any of the microphone circuits.
Possible Causes
(X712) MICROPHONE 1 IN (+) CIRCUIT OPEN
(X712) MICROPHONE 1 IN (+) CIRCUITS SHORTED TO VOLTAGE
INSIDE REARVIEW MIRROR
RADIO

Scheme 134

Scheme 134
Scheme 134

Scheme 135

Scheme 135
Scheme 135
  1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X712) MICROPHONE 1 IN (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Radio C1 harness connector. Turn the ignition on. Measure the voltage of the (X712) Microphone 1 IN (+) circuit. Is the voltage above 1.0 volt? Yes Repair the (X712) Microphone 1 IN (+) circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 4 .
  4. (X712) MICROPHONE 1 IN (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (X712) Microphone 1 IN (+) circuit between the Radio C1 connector and the inside Rearview Mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Radio in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X712) Microphone 1 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault in any of the microphone circuits.
Possible Causes
(X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO GROUND
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 136

Scheme 136
Scheme 136
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Hands Free Module harness connector. Measure the resistance between ground and the (X722) Microphone 2 circuit. Is the resistance below 10K ohms? Yes Repair the (X722) Microphone 2 circuit for short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Radio detects a fault in any of the microphone circuits.
Possible Causes
(X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO GROUND
INSIDE REARVIEW MIRROR
RADIO

Scheme 137

Scheme 137
Scheme 137
  1. CHECK FOR ACTIVE DTC With the scan tool, read the active DTC's. Cycle the ignition switch from off to on. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Inside Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Inside Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO GROUND Turn the ignition off. Disconnect the Radio C1 harness connector. Measure the resistance between ground and the (X722) Microphone 2 IN (+) circuit. Is the resistance below 10K ohms? Yes Repair the (X722) Microphone 2 IN (+) circuit for short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Replace the Radio in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault in any of the microphone circuits.
Possible Causes
(X722) MICROPHONE 2 IN (+) CIRCUIT OPEN
(X722) MICROPHONE 2 IN (+) CIRCUITS SHORTED TO VOLTAGE
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 138

Scheme 138
Scheme 138

Scheme 139

Scheme 139
Scheme 139
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X722) MICROPHONE CIRCUITS SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Hands Free Module harness connector. Turn the ignition on. Measure the voltage of the (X722) Microphone circuit. Is the voltage above 1.0 volt? Yes Repair the (X722) Microphone circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 4 .
  4. (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (X722) Microphone 2 IN (+) circuit between the HFM connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X722) Microphone 2 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault in any of the microphone circuits.
Possible Causes
(X722) MICROPHONE 2 IN (+) CIRCUIT OPEN
(X722) MICROPHONE 2 IN (+) CIRCUITS SHORTED TO VOLTAGE
INSIDE REARVIEW MIRROR
RADIO

Scheme 140

Scheme 140
Scheme 140

Scheme 141

Scheme 141
Scheme 141
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X722) MICROPHONE 2 IN (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Radio C1 harness connector. Turn the ignition on. Measure the voltage of the (X722) Microphone 2 IN (+) circuit. Is the voltage above 1.0 volt? Yes Repair the (X722) Microphone 2 IN (+) circuit for a short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 4 .
  4. (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN Turn the ignition off. Measure the resistance of the (X722) Microphone 2 IN (+) circuit between the Radio C1 connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Radio in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X722) Microphone 2 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

Scheme 142

Scheme 142: Circuit Schematic
Scheme 142: Circuit Schematic
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects low voltage on the (X793) Microphone Feed circuit.
Possible Causes
(X793) MICROPHONE FEED CIRCUIT SHORT TO GROUND
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 143

Scheme 143: Diagnostic Test
Scheme 143: Diagnostic Test
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. (X793) MICROPHONE FEED CIRCUIT SHORT TO GROUND Measure the resistance between ground and the (X793) Microphone Feed circuit Is the resistance below 100.0 ohms? Yes Repair the (X793) Microphone Feed circuit for short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 3 .
  3. INSIDE REARVIEW MIRROR Replace the Inside Rearview Mirror in accordance with the service information. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair is complete. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects high voltage on the (X793) Microphone Feed circuit.
Possible Causes
(X793) MICROPHONE FEED CIRCUIT SHORT TO VOLTAGE
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 144

Scheme 144: Diagnostic Test
Scheme 144: Diagnostic Test
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. (X793) MICROPHONE FEED CIRCUIT SHORT TO VOLTAGE Turn the ignition on. Measure the voltage of the (X793) Microphone Feed circuit. Is the voltage above 1.0 volt? Yes Repair the (X793) Microphone Feed circuit for short to voltage. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 3 .
  3. INSIDE REARVIEW MIRROR Replace the Inside Rearview Mirror in accordance with the service information. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair is complete. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects an open on the (X793) Microphone Feed circuit.
Possible Causes
(X793) MICROPHONE FEED CIRCUIT OPEN
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 145

Scheme 145: Diagnostic Test
Scheme 145: Diagnostic Test
  1. CHECK FOR ACTIVE DTC 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. Attempt to make a phone call with the system. 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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. (X793) MICROPHONE FEED CIRCUIT OPEN Turn the ignition off. Disconnect the Hands Free Module harness connector. Disconnect the Inside Rearview Mirror harness connector. Measure the resistance of the (X793) Microphone Feed circuit between the HFM connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Go To 3 . No Repair the (X793) Microphone Feed circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. INSIDE REARVIEW MIRROR Replace the Inside Rearview Mirror in accordance with the service information. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle. Attempt to make a phone call with the system. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair is complete. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: Rearview Mirror microphone fault.
Possible Causes
INSIDE REARVIEW MIRROR
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects an open in the (X712) microphone circuit.
Possible Causes
(X712) MICROPHONE 1 IN (+) CIRCUIT OPEN
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 146

Scheme 146: Diagnostic Test
Scheme 146: Diagnostic Test
  1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, record and erase DTCs. Turn the ignition off, wait 30 seconds then turn the ignition on. With the scan tool, read DTCs. Is the DTC active? Yes Go To 2 . No The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Connect a jumper wire from the (X712) Microphone 1IN (+) circuit to ground. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X712) MICROPHONE 1IN (+) CIRCUIT OPEN Turn the ignition off. Disconnect the Radio C1 harness connector. Disconnect the Inside Rearview Mirror harness connector. Measure the resistance of the (X712) Microphone 1IN (+) circuit between the Radio C1 connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X712) Microphone 1 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects an open in the (X722) microphone circuit.
Possible Causes
(X722) MICROPHONE 2 IN (+) CIRCUIT OPEN
INSIDE REARVIEW MIRROR
HANDS FREE MODULE

Scheme 147

Scheme 147: Diagnostic Test
Scheme 147: Diagnostic Test
  1. CHECK FOR ACTIVE DTC Turn the ignition on. With the scan tool, record and erase DTCs. Turn the ignition off, wait 30 seconds then turn the ignition on. With the scan tool, read DTCs. Is the DTC active? Yes Go To 2 . No The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  2. INSIDE REARVIEW MIRROR Turn the ignition off. Disconnect the Rearview Mirror harness connector. Connect a jumper wire from the (X722) Microphone 2 IN (+) circuit to ground. Turn the ignition on. With the scan tool, read the active DTC's. Does the scan tool display this DTC as active? Yes Go To 3 . No Replace the Rearview Mirror in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  3. (X722) MICROPHONE 2 IN (+) CIRCUIT OPEN Turn the ignition off. Disconnect the Radio C1 harness connector. Disconnect the Inside Rearview Mirror harness connector. Measure the resistance of the (X722) Microphone 2 IN (+) circuit between the Radio C1 connector and the inside rearview mirror connector. Is the resistance below 5.0 ohms? Yes Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (X722) Microphone 2 IN (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module will receive and monitor the VIN message from the PCM and record the VIN if different from the last VIN.
Possible Causes
INCORRECT VIN PROGRAMMED IN PCM
HANDS FREE MODULE
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault during an internal diagnostic check.
Possible Causes
HANDS FREE MODULE
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module will receive and monitor the vehicle line message from the PCM and record the vehicle line if different from the last vehicle line.
Possible Causes
INCORRECT PCM
HANDS FREE MODULE
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault during an internal diagnostic check.
Possible Causes
HANDS FREE MODULE
  1. When Monitored: With the ignition on.
  1. Set Condition: The Hands Free Module detects a fault during an internal diagnostic check.
Possible Causes
HANDS FREE MODULE
  1. When Monitored: Continuously
  1. Set Condition: Whenever the CAN Interior Bus (+) or (-) circuits are open, shorted to voltage, or shorted to ground.
Possible Causes
CAN INTERIOR BUS DTC's IN TIPM
(D265) CAN INTERIOR BUS (+) CIRCUIT OPEN
(D264) CAN INTERIOR BUS (-) CIRCUIT OPEN
HANDS FREE MODULE

Scheme 148

Scheme 148: Diagnostic Test
Scheme 148: Diagnostic Test

Scheme 149

Scheme 149
Scheme 149
  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 connectors. Look for broken, bent, pushed out, or corroded terminals.
  2. CHECK TIPM DTC's With the scan tool, read TIPM active DTC's Does the scan tool display any CAN Interior Bus DTCs - ACTIVE? Yes Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Go To 3 .
  3. (D265) CAN INTERIOR BUS (+) CIRCUIT OPEN Turn the ignition off. Disconnect the Hands Free Module connector. Disconnect the TIPM C7 harness connector. Measure the resistance of the (D265) CAN Interior Bus (+) circuit between the TIPM C7 connector and the Hands Free Module connector. Is the resistance below 2.0 ohms? Yes Go To 4 . No Repair the (D265) CAN Interior Bus (+) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .
  4. (D264) CAN INTERIOR BUS (-) CIRCUIT OPEN Measure the resistance of the (D264) CAN Interior Bus (-) circuit between the TIPM C7 harness connector and the Hands Free Module connector. Is the resistance below 2.0 ohms? Yes Replace the Hands Free Module in accordance with the service information. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) . No Repair the (D264) CAN Interior Bus (-) circuit for an open. Perform «BODY VERIFICATION TEST - VER 1»(ref-306151-S09725333202008120900000) .

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