Diagnostic Procedure

WARNING: This page is about a different car, the 2021 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DTC B1453:62 (POWER LIFTGATE CONTROL MODULE) DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT LIFTGATE LATCH SWITCH CONNECTOR CONDITION Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Disconnect the liftgate latch switch 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.
1		No	Repair or replace the connector, then go to Step 11.
2	INSPECT LIFTGATE LATCH SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the liftgate latch switch connector is disconnected. Inspect for continuity between liftgate latch switch terminal A (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
2		No	Refer to the wiring diagram and verify whether or not there is a common connector between liftgate latch switch terminal A and body ground. 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 11.
3	INSPECT LIFTGATE LATCH SWITCH Inspect the liftgate latch switch. (See LIFTGATE/POWER LIFTGATE (PLG) LATCH SWITCH INSPECTION .) Is the liftgate latch switch normal?	Yes	Go to the next step.
3		No	Replace the liftgate latch switch, then go to Step 11. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .)
4	INSPECT POWER LIFTGATE (PLG) LATCH SWITCH CONNECTOR CONDITION Disconnect the power liftgate (PLG) latch switch 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.
4		No	Repair or replace the connector, then go to Step 11.
5	INSPECT POWER LIFTGATE (PLG) LATCH SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT Verify that the power liftgate (PLG) latch switch connector is disconnected. Inspect for continuity between power liftgate (PLG) latch switch terminal C (wiring harness-side) and body ground. Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between power liftgate (PLG) latch switch terminal C and body ground. 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 11.
6	INSPECT POWER LIFTGATE (PLG) CONTROL MODULE CONNECTOR CONDITION Disconnect the power liftgate (PLG) 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.
6		No	Repair or replace the connector, then go to Step 11.
7	INSPECT LATCH SWITCH CIRCUIT FOR SHORT TO GROUND Verify that the liftgate latch switch, power liftgate (PLG) latch switch and power liftgate (PLG) control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Liftgate latch switch terminal B Power liftgate (PLG) latch switch terminal E Power liftgate (PLG) latch switch terminal B Power liftgate (PLG) latch switch terminal D Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Liftgate latch switch terminal B-Power liftgate (PLG) control module terminal 1S Power liftgate (PLG) latch switch terminal E-Power liftgate (PLG) control module terminal 1T Power liftgate (PLG) latch switch terminal B-Power liftgate (PLG) control module terminal 1Q Power liftgate (PLG) latch switch terminal D-Power liftgate (PLG) control module terminal 1O 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 11.
7		No	Go to the next step.
8	INSPECT LATCH SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the liftgate latch switch, power liftgate (PLG) latch switch and power liftgate (PLG) control module 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 following terminals (wiring harness-side): Liftgate latch switch terminal B Power liftgate (PLG) latch switch terminal E Power liftgate (PLG) latch switch terminal B Power liftgate (PLG) latch switch terminal D Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Liftgate latch switch terminal B-Power liftgate (PLG) control module terminal 1S Power liftgate (PLG) latch switch terminal E-Power liftgate (PLG) control module terminal 1T Power liftgate (PLG) latch switch terminal B-Power liftgate (PLG) control module terminal 1Q Power liftgate (PLG) latch switch terminal D-Power liftgate (PLG) control module terminal 1O 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 supply. Go to Step 11.
8		No	Go to the next step.
9	INSPECT LATCH SWITCH CIRCUIT FOR OPEN CIRCUIT Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Verify that the liftgate latch switch, power liftgate (PLG) latch switch and power liftgate (PLG) control module connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Liftgate latch switch terminal B-Power liftgate (PLG) control module terminal 1S Power liftgate (PLG) latch switch terminal E-Power liftgate (PLG) control module terminal 1T Power liftgate (PLG) latch switch terminal B-Power liftgate (PLG) control module terminal 1Q Power liftgate (PLG) latch switch terminal D-Power liftgate (PLG) control module terminal 1O Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Liftgate latch switch terminal B-Power liftgate (PLG) control module terminal 1S Power liftgate (PLG) latch switch terminal E-Power liftgate (PLG) control module terminal 1T Power liftgate (PLG) latch switch terminal B-Power liftgate (PLG) control module terminal 1Q Power liftgate (PLG) latch switch terminal D-Power liftgate (PLG) control module terminal 1O 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 11.
10	INSPECT POWER LIFTGATE (PLG) LATCH SWITCH Inspect the power liftgate (PLG) latch switch. (See LIFTGATE/POWER LIFTGATE (PLG) LATCH SWITCH INSPECTION .) Is the power liftgate (PLG) latch switch normal?	Yes	Go to the next step.
10		No	Replace the power liftgate (PLG) latch switch, then go to the next step. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION .)
11	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Always reconnect all disconnected connectors. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .) Clear the DTC for the power liftgate (PLG) control module using the M-MDS. (See CLEARING DTC [POWER LIFTGATE (PLG) CONTROL MODULE] .) Retrieve the power liftgate (PLG) control module DTCs using the M-MDS. (See DTC INSPECTION [POWER LIFTGATE (PLG) CONTROL MODULE] .) Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the power liftgate (PLG) control module. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION .) Go to the next step.
11		No	Go to the next step.
12	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 [POWER LIFTGATE (PLG) CONTROL MODULE] .)
12		No	DTC troubleshooting completed.