LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (On-Board Diagnostic - HS/Ms - Can) >> Determining Short To Power Supply Location (Ms-Can) >> Determination Procedure

Determination Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
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 cable before performing any work that requires handling of connectors.
Step Inspection Action
1 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND REAR BODY CONTROL MODULE (RBCM) 
 Yes Go to the next step.
No Go to Step 9.
2 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND DLC-2 
  • Measure the voltage at DLC-2 terminals L and K.
  • Is the voltage 0 V  ?
 Yes Go to the next step.
No Repair or replace the wiring harness between DLC-2 and connector C-34 because the wiring harness is shorted to the power supply.
3 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND INSTRUMENT CLUSTER 
  • Measure the voltage at instrument cluster terminals C and E.
  • Is the voltage between 1.5 - 3.5 V  ?
 Yes
  • Go to Step 5. (with full-auto air conditioner)
  • Go to Step 6. (with manual air conditioner)
No Go to the next step.
4 INSPECT INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY 
 Yes Replace the instrument cluster because there is a short to the power supply in the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness between the instrument cluster and connector C-34 because the wiring harness is shorted to the power supply.
5 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND CLIMATE CONTROL UNIT 
 Yes Replace the climate control unit because there is a short to the power supply in the climate control unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER] .)
No Repair or replace the wiring harness between the climate control unit and connector C-34 because the wiring harness is shorted to the power supply.
6 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND CLIMATE CONTROL UNIT 
  • Measure the voltage at climate control unit terminals D and B.
  • Is the voltage between 1.5 - 3.5 V  ?
 Yes Go to Step 8.
No Go to the next step.
7 INSPECT CLIMATE CONTROL UNIT FOR SHORT TO POWER SUPPLY 
 Yes Replace the climate control unit because there is a short to the power supply in the climate control unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER] .)
No Repair or replace the wiring harness between the climate control unit and connector C-34 because the wiring harness is shorted to the power supply.
8 INSPECT INDICATOR UNIT FOR SHORT TO POWER SUPPLY 
 Yes Replace the indicator unit because there is a short to the power supply in the indicator unit.
(See INDICATOR UNIT REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness between the indicator unit and connector C-34 because the wiring harness is shorted to the power supply.
9 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-34 AND CONNECTOR C-08 
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-34 and connector C-08 because the wiring harness is shorted to the power supply.
10 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN CONNECTOR C-08 AND REAR BODY CONTROL MODULE (RBCM) 
 Yes Go to the next step.
No Repair or replace the wiring harness between connector C-08 and rear body control module (RBCM) because the wiring harness is shorted to the power supply.
11 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) AND REAR BODY CONTROL MODULE (RBCM) 
  • Measure the voltage at blind spot monitoring (BSM) control module (LH) terminals C and D.
  • Is the voltage between 1.5 - 3.5 V  ?
 Yes Replace the rear body control module (RBCM) because there is a short to the power supply in the rear body control module (RBCM).
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
No Go to the next step.
12 INSPECT FOR SHORT TO POWER SUPPLY BETWEEN REAR BODY CONTROL MODULE (RBCM) AND CONNECTOR C-23 
 Yes Go to the next step.
No Repair or replace the wiring harness between the rear body control module (RBCM) and connector C-23 because the wiring harness is shorted to the power supply.
13 INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) FOR SHORT TO POWER SUPPLY 
 Yes Replace the blind spot monitoring (BSM) control module (LH) because there is a short to power supply in the blind spot monitoring (BSM) control module (LH).
(See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION .)
No Repair or replace the wiring harness between the blind spot monitoring (BSM) control module (LH) and connector C-23 because the wiring harness is shorted to power supply.
scientia non olet · About LEMON Manuals