Determination Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. 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 connector, touch it with a paper clip or similar thin pin without directly inserting a tester probe into the terminal.
Disconnect the negative battery terminal before performing any work that requires handling of connectors.

DETERMINING SHORT TO POWER SUPPLY LOCATION (CAN-BUS No. 1, US) - DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT CAN LINE BETWEEN BODY CONTROL MODULE (BCM) AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-40. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 3.
1		No	Go to the next step.
2	INSPECT BODY CONTROL MODULE (BCM) FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector 3 which has body control module (BCM) terminals 3X and 3W. Connect the connector C-40. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W (wiring harness side). Is the voltage between 1.5-3.5 V?	Yes	Replace the body control module (BCM) because there is a short to the power supply in the body control module (BCM). (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION (US) .)
2		No	Repair or replace the wiring harness between the body control module (BCM) and connector C-40 because the wiring harness is shorted to the power supply.
3	INSPECT CAN LINE BETWEEN EPS CONTROL MODULE AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY Measure the voltage at EPS control module terminals 2C and 2A. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 5.
3		No	Go to the next step.
4	INSPECT EPS CONTROL MODULE FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the EPS control module connector. Connect the connector C-40. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the EPS control module because there is a short to the power supply in the EPS control module. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION (US) .)
4		No	Repair or replace the wiring harness between the EPS control module and connector C-40 because the wiring harness is shorted to the power supply.
5	INSPECT CAN LINE BETWEEN ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY Measure the voltage at adaptive front lighting system (AFS) control module terminals E and H. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 7.
5		No	Go to the next step.
6	INSPECT ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the adaptive front lighting system (AFS) control module connector. Connect the connector C-40. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the adaptive front lighting system (AFS) control module because there is a short to the power supply in the adaptive front lighting system (AFS) control module. (See ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE REMOVAL/INSTALLATION (US) .)
6		No	Repair or replace the wiring harness between the adaptive front lighting system (AFS) control module and connector C-40 because the wiring harness is shorted to the power supply.
7	INSPECT CAN LINE BETWEEN CONNECTOR C-13 AND CONNECTOR C-40 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-13. Connect the connector C-40. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness between the connector C-13 and connector C-40 because the wiring harness is shorted to the power supply.
8	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTOR C-13 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-21. Connect the connector C-13. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness between the connector C-21 and connector C-13 because the wiring harness is shorted to the power supply.
9	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND PCM FOR SHORT TO POWER SUPPLY Measure the voltage at PCM terminals 2S and 2T. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
9		No	Go to Step 13.
10	INSPECT CAN LINE BETWEEN CONNECTOR C-21 AND CONNECTORS C-55, C-56 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connectors C-55, C-56. Connect the connector C-21. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
10		No	Repair or replace the wiring harness between connector C-21 and connectors C-55, C-56 because the wiring harness is shorted to the power supply.
11	INSPECT CAN LINE BETWEEN SAS CONTROL MODULE AND CONNECTORS C-55, C-56 FOR SHORT TO POWER SUPPLY Measure the voltage at PCM terminals 2S and 2T. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
11		No	Repair or replace the wiring harness between the connectors C-55, C-56 and connector C-21 because the wiring harness is shorted to the power supply.
12	INSPECT SAS CONTROL MODULE FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US)) Disconnect the SAS control module connector. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US)) Switch the ignition ON (engine off). Inspect for continuity between SAS control module terminals 3A and 3D (wiring harness side). Is the voltage 0 V?	Yes	Replace the SAS control module connector because there is a short to the power supply in the SAS control module connector. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
12		No	Repair or replace the wiring harness between the SAS control module and connectors C-55, C-56 because the wiring harness is shorted to the power supply.
13	INSPECT CAN LINE BETWEEN CONNECTOR C-07 AND CONNECTOR C-21 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-07. Connect the connector C-21. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step. (SKYACTIV-G 2.0, SKYACTIV-G 2.5 with connectors C-37, C-36) Go to Step 18. (SKYACTIV-G 2.0, SKYACTIV-G 2.5 without connectors C-37, C-36)
13		No	Repair or replace the wiring harness between the connector C-07 and connector C-21 because the wiring harness is shorted to the power supply.
14	INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-07 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connectors C-37, C-36. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
14		No	Repair or replace the wiring harness between the connectors C-37, C-36 and connector C-07 because the wiring harness is shorted to the power supply.
15	INSPECT CAN LINE BETWEEN DSC HU/CM AND CONNECTORS C-37, C-36 FOR SHORT TO POWER SUPPLY Measure the voltage at DSC HU/CM terminals L and J. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 17.
15		No	Go to the next step.
16	INSPECT DSC HU/CM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the DSC HU/CM connector. Connect the connectors C-37, C-36. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the DSC HU/CM because there is a short to the power supply in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (US)] .)
16		No	Repair or replace the wiring harness between the DSC HU/CM and connectors C-37, C-36 because the wiring harness is shorted to the power supply.
17	INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-02 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-02. Connect the connectors C-37, C-36. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 20. (ATX) Go to Step 24. (MTX)
17		No	Repair or replace the wiring harness between the connectors C-37, C-36 and connector C-02 because the wiring harness is shorted to the power supply.
18	INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-07 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-02. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 20. (ATX) Go to Step 24. (MTX)
18		No	Go to the next step.
19	INSPECT DSC HU/CM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the DSC HU/CM connector. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the DSC HU/CM because there is a short to the power supply in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (US)] .)
19		No	Repair or replace the wiring harness between connector C-07 and connector C-02 because the wiring harness is shorted to the power supply.
20	INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-02 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-38. Connect the connector C-02. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
20		No	Repair or replace the wiring harness between connector C-38 and connector C-02 because the wiring harness is shorted to the power supply.
21	INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-38 FOR SHORT TO POWER SUPPLY Measure the voltage at TCM terminals E and F. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 23.
21		No	Go to the next step.
22	INSPECT TCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the TCM connector. Connect the connector C-38. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the TCM because there is a short to the power supply in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (US)] .) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (US)] .)
22		No	Repair or replace the wiring harness between the TCM and connector C-38 because the wiring harness is shorted to the power supply.
23	INSPECT CAN LINE BETWEEN CONNECTOR C-38 AND CONNECTOR C-01 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-01. Connect the connector C-38. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 25.
23		No	Repair or replace the wiring harness between connector C-38 and connector C-01 because the wiring harness is shorted to the power supply.
24	INSPECT CAN LINE BETWEEN CONNECTOR C-02 AND CONNECTOR C-01 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Connect the connector C-02. Disconnect the connector C-01. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to the next step.
24		No	Repair or replace the wiring harness between connector C-02 and connector C-01 because the wiring harness is shorted to the power supply.
25	INSPECT PCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the PCM connector. Connect the connector C-01. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the PCM because there is a short to the power supply in the PCM. (See PCM REMOVAL/INSTALLATION (VIN M) .) (See PCM REMOVAL/INSTALLATION (VIN L) .)
25		No	Repair or replace the wiring harness between the PCM and connector C-01 because the wiring harness is shorted to the power supply.
26	INSPECT CAN LINE BETWEEN CONNECTORS C-37, C-36 AND CONNECTOR C-07 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connectors C-37, C-36. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 29.
26		No	Go to the next step.
27	INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-02. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at TCM terminals E and F. Is the voltage between 1.5-3.5 V?	Yes	Repair or replace the wiring harness between connector C-07 and connector C-02 and connectors C-37, C-36 because the wiring harness is shorted to the power supply.
27		No	Go to the next step.
28	INSPECT TCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the TCM connector. Connect the connector C-02. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the TCM because there is a short to the power supply in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (US)] .) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (US)] .)
28		No	Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted to the power supply.
29	INSPECT CAN LINE BETWEEN DSC HU/CM AND CONNECTORS C-37, C-36 FOR SHORT TO POWER SUPPLY Measure the voltage at DSC HU/CM terminals L and J. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 31.
29		No	Go to the next step.
30	INSPECT DSC HU/CM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the DSC HU/CM connector. Connect the connectors C-37, C-36. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the DSC HU/CM because there is a short to the power supply in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (US)] .)
30		No	Repair or replace the wiring harness between the DSC HU/CM and connectors C-37, C-36 because the wiring harness is shorted to the power supply.
31	INSPECT PCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the PCM connector. Connect the connectors C-37, C-36. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the PCM because there is a short to the power supply in the PCM.
31		No	Repair or replace the wiring harness between the PCM and connectors C-37, C-36 because the wiring harness is shorted to the power supply.
32	INSPECT CAN LINE BETWEEN TCM AND CONNECTOR C-02 FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the connector C-02. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at TCM terminals E and F. Is the voltage between 1.5-3.5 V?	Yes	Go to Step 34.
32		No	Go to the next step.
33	INSPECT TCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the TCM connector. Connect the connector C-02. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the TCM because there is a short to the power supply in the TCM. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [ET6A-EL, ET6AX-EL (US)] .) (See CONTROL VALVE BODY REMOVAL/INSTALLATION [EV6A-EL, EV6AX-EL (US)] .)
33		No	Repair or replace the wiring harness between the TCM and connector C-02 because the wiring harness is shorted to the power supply.
34	INSPECT DSC HU/CM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the DSC HU/CM connector. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the DSC HU/CM because there is a short to the power supply in the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D. (US)] .)
34		No	Go to the next step.
35	INSPECT PCM FOR SHORT TO POWER SUPPLY Switch the ignition off. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the PCM connector. Connect the connector C-07. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off). Measure the voltage at body control module (BCM) terminals 3X and 3W. Is the voltage between 1.5-3.5 V?	Yes	Replace the PCM because there is a short to the power supply in the PCM.
35		No	Repair or replace the wiring harness between the PCM and the DSC HU/CM and connector C-02 and connector C-07 because the wiring harness is shorted to the power supply.