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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 172 (On-Board Diagnostic - Radar Unit) >> DTC C1A67-4B; Radar Unit Is Outside Of Operation Range (Ignition Power Supply, Internal Temperature) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY PCM DTCs Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
No Go to the next step.
2 INSPECT BATTERY Yes Go to the next step.
No Recharge or replace the battery, then go to Step 9.
(See BATTERY RECHARGING [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3 INSPECT GENERATOR Yes Go to the next step.
No Replace the generator, then go to Step 9.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-ELOOP)] .)
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)] .)
4 INSPECT IG1 RELAY Yes Go to the next step.
No Replace the IG1 relay, then go to Step 9.
(See RELAY LOCATION .)
5 VERIFY RADAR UNIT POWER SUPPLY VOLTAGE Yes Go to the next step.
No Inspect the MAIN 200 A fuse.
  • If the fuse is blown:
    • Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and IG1 relay terminal D.

    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.
    • Replace the fuse.
    • If the fuse is damaged:
      • Replace the fuse.
  • If the fuse is normal:
    • Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal fuse and IG1 relay terminal D.

    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 9.
6 INSPECT RADAR UNIT CONNECTOR CONDITION
  • Remove front bumper. (See FRONT BUMPER REMOVAL .) (See FRONT BUMPER INSTALLATION .)
  • Disconnect the radar unit 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 9.
7 INSPECT IG1 RELAY CIRCUIT FOR SHORT TO GROUND
  • Verify that the IG1 relay is removed.
  • Verify that the radar unit connector is disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • IG1 relay terminal C
      • Radar unit terminal E
  • Is there continuity?
 Yes Inspect the C/U IG1 15 A fuse.
  • If the fuse is blown:
    • Refer to the wiring diagram and verify whether or not there is a common connector between C/U IG1 15 A fuse and radar unit terminal E.

    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.
    • Replace the fuse.
    • If the fuse is normal:
    • Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and C/U IG1 15 A fuse.

    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 9.
No Go to the next step.
8 INSPECT IG1 RELAY CIRCUIT FOR OPEN CIRCUIT
  • Verify that the IG1 relay is removed.
  • Verify that the radar unit connector is disconnected.
  • Inspect for continuity between IG1 relay terminal C (wiring harness-side) and radar unit terminal E (wiring harness-side).
  • Is there continuity?
 Yes Go to the next step.
No Inspect the C/U IG1 15 A fuse.
  • If the fuse is damaged:
    • Replace the fuse.
  • If the fuse is normal:
    • Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and radar unit terminal E.

    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 the next step.
9 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
10 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 [RADAR UNIT] .)
No DTC troubleshooting completed.
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