DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.7) [(US)]
DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.7) [(US)]
SM2566470
id1002x1004400
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Caution
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• Perform the following malfunction diagnosis only when it is diagnosed with a short to ground by CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(US)].)
System Wiring Diagram
am3zzw00027526
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Determination Procedure
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Caution
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• When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.• When inspecting the connector, touch it with a paper clip or similar thin pin without directly inserting a tester probe into the terminal.• Disconnect the negative battery cable before performing any work that requires handling of connectors.
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Step |
Inspection |
Action |
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1
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INSPECT BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the connector 4 which has body control module (BCM) terminals 4R and 4Q.
• Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 4R and 4Q (wiring harness side).
• Is the voltage at body control module (BCM) terminals 4R and 4Q (wiring harness side) the same?
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Yes
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Go to the next step.
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No
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Replace the body control module (BCM) because there is a short between circuits in the body control module (BCM).
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2
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INSPECT CAN LINE BETWEEN CONNECTOR C-49 AND BODY CONTROL MODULE (BCM) FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the connector C-49.
• Connect the connector 4 which has body control module (BCM) terminals 4R and 4Q.
• Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 4R and 4Q.
• Is the voltage at body control module (BCM) terminals 4R and 4Q the same?
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Yes
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Repair or replace the wiring harness between the body control module (BCM) and connector C-49 because the wiring harness is shorted between circuits.
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No
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Go to the next step.
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3
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INSPECT JB NO.2 FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Connect the connector C-49.
• Disconnect the connector C-48.
• Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 4R and 4Q.
• Is the voltage at body control module (BCM) terminals 4R and 4Q the same?
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Yes
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Replace the JB No.2 because there is a short between circuits in the JB No.2.
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No
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Go to the next step.
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4
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INSPECT BETWEEN AUDIO AMPLIFIER AND CONNECTOR C-48 FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Inspect for continuity between audio amplifier terminals 2N and 2M. (With Bose ® type audio).
• Inspect for continuity between audio amplifier terminals 1Q and 1S. (Without Bose ® type audio)
• Is there continuity?
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Yes
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Go to the next step.
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No
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Go to Step 6.
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5
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INSPECT AUDIO AMPLIFIER FOR SHORT BETWEEN CIRCUITS
• Disconnect the audio amplifier connector.
• Inspect for continuity between audio amplifier terminals 2N and 2M (wiring harness side). (With Bose ® type audio).
• Inspect for continuity between audio amplifier terminals 1Q and 1S (wiring harness side). (Without Bose ® type audio)
• Is there continuity?
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Yes
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Repair or replace the wiring harness between the audio amplifier and connector C-48 because the wiring harness is shorted between circuits.
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No
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Replace the audio amplifier because there is a short between circuits in the audio amplifier.
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6
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INSPECT BETWEEN CONNECTOR C-48 AND CONNECTOR C-13 FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Connect the connector C-48.
• Disconnect the connector C-13.
• Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 4R and 4Q.
• Is the voltage at body control module (BCM) terminals 4R and 4Q the same?
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Yes
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Repair or replace the wiring harness between the connector C-48 and connector C-13 because the wiring harness is shorted between circuits.
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No
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Go to the next step.
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7
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INSPECT CONNECTIVITY MASTER UNIT (CMU) FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the connectivity master unit (CMU) connector.
• Connect the connector C-13.
• Connect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 4R and 4Q.
• Is the voltage at body control module (BCM) terminals 4R and 4Q the same?
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Yes
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Repair or replace the wiring harness between the connectivity master unit (CMU) and connector C-13 because the wiring harness is shorted between circuits.
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No
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Replace the connectivity master unit (CMU) because there is a short between circuits in the connectivity master unit (CMU).
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