DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.2) [(US)]
DETERMINING SHORT BETWEEN CIRCUITS LOCATION (CAN-BUS No.2) [(US)]
SM2566450
id1002x1002400
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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
am3zzw00027521
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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 terminal 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 terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the connector 2 which has body control module (BCM) terminals 2H and 2F.
• Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 2H and 2F (wiring harness side).
• Is the voltage at body control module (BCM) terminals 2H and 2F (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 PCM FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the PCM connector.
• Connect the connector 2 which has body control module (BCM) terminals 2H and 2F.
• Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Switch the ignition ON (engine off).
• Measure the voltage at body control module (BCM) terminals 2H and 2F.
• Is the voltage at body control module (BCM) terminals 2H and 2F 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 PCM because there is a short between circuits in the PCM.
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3
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INSPECT DSC HU/CM FOR SHORT BETWEEN CIRCUITS
• Switch the ignition off.
• Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)].)
• Disconnect the DSC HU/CM connector.
• Disconnect the connector 2 which has body control module (BCM) terminals 2H and 2F.
• Inspect for continuity between DSC HU/CM terminals AQ and AN (wiring harness side).
• Is there continuity?
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Yes
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Repair or replace the wiring harness between the DSC HU/CM and body control module (BCM) and PCM because the wiring harness is shorted between circuits.
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No
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Replace the DSC HU/CM because there is a short between circuits in the DSC HU/CM.
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