DTC C1357 Left TCS Motor Circuit Shorted to Ground. Buick Regal 1998

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1998 🢒 Regal 🢒 DTC 🢒 DTC C1357 Left TCS Motor Circuit Shorted to Ground

ABS Components
Antilock Brake System Schematics
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice

Circuit Description

DTC C1357 identifies a TCS motor circuit that shorts to ground. DTC C1357 will cause one of the following conditions:

•	The TCS motor cannot be controlled at the commanded current rate.

•	The TCS motor driver circuit will allow current to go directly to ground.

Conditions for Setting the DTC

DTC C1357 can set anytime.

A malfunction exists if the EBCM/EBTCM detects an out of range voltage on either of the left front TCS motor circuits, indicating a short to ground.

Action Taken When the DTC Sets

•	A malfunction DTC stores.

•	The TCS disables.

•	The amber TCS indicator turns on.

Conditions for Clearing the DTC

•	The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.

•	100 drive cycles pass with no DTC(s) detected.

Diagnostic Aids

The following conditions may cause an intermittent malfunction:

•	A poor connection

•	Rubbed-through wire insulation

•	A broken wire inside the insulation

If the malfunction is not current, perform the following procedure in order to pinpoint identify an intermittent malfunction in the motor circuitry or connections:

Wiggle the wires of the affected channel.
Inspect to see if the DTC resets.

Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual for the procedure.

Thoroughly inspect any circuitry that may cause the intermittent complaint for the following conditions:

•	Backed out terminals

•	Improper mating

•	Broken locks

•	Improperly formed or damaged terminals

•	Poor terminal-to-wiring connections

•	Physical damage to the wiring harness

Step

Action

Value(s)

Yes

Was the Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check

Does DTC C1357 occur intermittently?

Go to Diagnostic System Check

Go to Step 3

Turn the ignition switch to the OFF position.
Disconnect the 8-way EBCM/EBTCM connector C3.
Disconnect the 4-way TCS motor pack connector.
Use the J 39200 in order to measure the resistance between the 4-way TCS motor pack connector terminal A and ground.

Is the resistance within the specified range?

(Infinite)

Go to Step 4

Go to Step 9

Use J 39200 in order to measure the resistance between the 4-way TCS motor pack harness connector terminal B and ground.

Is the resistance within the specified range?

(Infinite)

Go to Step 5

Go to Step 10

Use the J 39200 in order to measure the resistance between the TCS motor pack connector terminal A and ground.

Is the resistance within the specified range?

(Infinite)

Go to Step 6

Go to Step 8

Inspect the 4-way TCS motor pack connector and the 4-way TCS motor pack harness connector for the following conditions:

•	Poor terminal contact

•	Terminal corrosion

•	Damaged terminal(s)

Inspect the 8-way EBCM/EBTCM connector C3 and the 8-way EBCM/EBTCM harness connector C3 for the following conditions:

•	Poor terminal contact

•	Terminal corrosion

•	Damaged terminal(s)

Is there poor terminal contact, terminal corrosion, or terminal damage evident?

Go to Step 11

Go to Step 7

Reconnect the 4-way TCS motor pack connector.
Reconnect the 8-way EBCM/EBTCM connector C3.
Start the vehicle.
Test drive the vehicle obtaining a speed at least 16 km/h (10 mph).
Stop the vehicle.
Turn the ignition switch to the OFF position.
Repeat the drive sequence two additional times.
Use the Scan Tool in order to inspect for DTCs.

Did DTC C1357 set as a current DTC in the last three drive cycles?

Go to Step 12

Go to Step 13

Replace the TCS motor pack.

Is the repair complete?

Go to Diagnostic System Check

Repair the short to ground in CKT 564.

Is the repair complete?

Go to Diagnostic System Check

Repair the short to ground in CKT 565.

Is the repair complete?

Go to Diagnostic System Check

Replace all of the terminals or the connectors that exhibit the following conditions:

•	Poor terminal contact

•	Terminal corrosion

•	Damaged terminal(s)

Is the repair complete?

Go to Diagnostic System Check

Replace the EBCM/EBTCM.

Is the repair complete?

Go to Diagnostic System Check

The malfunction is intermittent or not present at this time.

Is the repair complete?

Go to Diagnostic Aids