LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - HS/Ms - Can >> Determining Short Between Circuits Location (Ms-Can) >> Determination Procedure

Determination Procedure

CAUTION:
  • When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.
  • When inspecting the DLC-2, touch it with a paper clip or similar thin pin without directly inserting a tester into the terminals.
  • Disconnect the negative battery terminal before performing any work that requires handling of connectors.
Step Inspection Action
1 INSPECT BETWEEN CONNECTOR C-63 AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS Yes Go to Step 5.
No Go to the next step.
2 INSPECT BETWEEN CONNECTOR C-63 AND CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS
  • Switch the ignition off (LOCK).
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Inspect for continuity between climate control unit terminals 1K and 1M (with full - auto air conditioner).
  • Inspect for continuity between climate control unit terminals Q and S (with manual air conditioner).
  • Is there continuity?
 Yes Go to the next step.
No Go to Step 4.
3 INSPECT CLIMATE CONTROL UNIT FOR SHORT BETWEEN CIRCUITS
  • Disconnect the climate control unit connector.
  • Inspect for continuity between climate control unit terminals 1K and 1M (wiring harness side). (with full-auto air conditioner)
  • Inspect for continuity between climate control unit terminals Q and S (wiring harness side). (with manual air conditioner)
  • Is there continuity?
 Yes Repair or replace the wiring harness between the climate control unit and connector C-63 because the wiring harness is shorted between circuits.
No Replace the climate control unit because there is a short between circuits inside the climate control unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
4 INSPECT INSTRUMENT CLUSTER FOR SHORT BETWEEN CIRCUITS
  • Disconnect the instrument cluster connector.
  • Inspect for continuity between instrument cluster terminals C and E (wiring harness side).
  • Is there continuity?
 Yes Repair or replace the wiring harness between the instrument cluster and connector C-63 because the wiring harness is shorted between circuits.
No Replace the instrument cluster because there is a short between circuits in the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
5 INSPECT BETWEEN CONNECTOR C-63 AND CONNECTOR C-64 FOR SHORT BETWEEN CIRCUITS Yes Repair or replace the wiring harness between connector C-63 and connector C-64 because the wiring harness is shorted between circuits.
No Go to the next step.
6 INSPECT BETWEEN CONNECTOR C-64 AND DLC-2 FOR SHORT BETWEEN CIRCUITS Yes Repair or replace the wiring harness between connector C-64 and DLC-2 because the wiring harness is shorted between circuits.
No Go to the next step.
7 INSPECT BETWEEN CONNECTOR C-64 AND CONNECTOR C-14 FOR SHORT BETWEEN CIRCUITS
  • Disconnect connector C-14.
  • Connect connector C-64.
  • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Switch the ignition ON (engine off).
  • Measure the voltage at DLC-2 terminals L and K.
  • Is the voltage at DLC-2 terminals L and K the same?
 Yes Repair or replace the wiring harness between connector C-64 and connector C-14 because the wiring harness is shorted between circuits.
No Go to the next step.
8 INSPECT BETWEEN CONNECTOR C-14 AND CONNECTOR C-71 FOR SHORT BETWEEN CIRCUITS Yes Repair or replace the wiring harness between connector C-14 and connector C-71 because the wiring harness is shorted between circuits.
No Go to the next step.
9 INSPECT BETWEEN CONNECTOR C-71 AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS Yes Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-71 because the wiring harness is shorted between circuits.
No Go to the next step.
10 INSPECT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) FOR SHORT BETWEEN CIRCUITS
  • Switch the ignition off (LOCK).
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Inspect the continuity between blind spot monitoring (BSM) control module (LH) terminals C and D.
  • Is there continuity?
 Yes Go to the next step.
No Replace the rear body control module (RBCM) because there is a short between circuits in the rear body control module (RBCM).
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
11 INSPECT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND CONNECTOR C-39 FOR SHORT BETWEEN CIRCUITS
  • Disconnect connector C-39.
  • Inspect the continuity between blind spot monitoring (BSM) control module (LH) terminals C and D.
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-39 because the wiring harness is shorted between circuits.
12 INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) FOR SHORT BETWEEN CIRCUITS
  • Disconnect the blind spot monitoring (BSM) control module (LH) connector.
  • Inspect for continuity between blind spot monitoring (BSM) control module (LH) terminals C and D (wiring harness side).
  • Is there continuity?
 Yes Repair or replace the wiring harness between the blind spot monitoring (BSM) control module (LH) and connector C-39 because the wiring harness is shorted between circuits.
No Replace the blind spot monitoring (BSM) control module (LH) because there is a short between circuits in the blind spot monitoring (BSM) control module (LH).
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION .)
scientia non olet · About LEMON Manuals