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Diagnostic Procedure

DTC B1207:86 (REAR BODY CONTROL MODULE (RBCM)) DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY SAS CONTROL MODULE DTCs Yes Go to the applicable DTC inspection.
(See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.)] .)
No Go to the next step.
2 INSPECT SAS CONTROL MODULE CONNECTOR
  • Switch the ignition to off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the SAS control module connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 7.
3 INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR
  • Disconnect the rear body control module (RBCM) connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
 Yes Go to the next step.
No Repair or replace the connector, then go to Step 7.
4 INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT TO GROUND
  • Verify that the SAS control module and rear body control module (RBCM) connectors are disconnected.
  • Inspect for continuity between SAS control module terminal 1AF (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal 1AF and rear body control module (RBCM) terminal 3R.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to ground.

Go to Step 7.
No Go to the next step.
3 INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT TO POWER SUPPLY
  • Verify that the SAS control module and rear body control module (RBCM) connectors are disconnected.
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Switch the ignition ON (engine off or on).
  • Measure the voltage at the SAS control module terminal 1AF (wiring harness-side).
  • Is the voltage 0 V?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal 1AF and rear body control module (RBCM) terminal 3R.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to power

Go to Step 7.
6 INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND REAR BODY CONTROL MODULE (RBCM) FOR OPEN CIRCUIT
  • Switch the ignition off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Verify that the SAS control module and rear body control module (RBCM) connectors are disconnected.
  • Inspect the wiring harness for continuity between SAS control module terminal 1AF (wiring harness-side) and rear body control module (RBCM) terminal 3R (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal 1AF and rear body control module (RBCM) terminal 3R.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit.

Go to Step 7.
7 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
No Go to the next step.
8 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE (REAR BODY CONTROL MODULE (RBCM)) .)
No DTC troubleshooting completed
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