For 1990-2009 cars
ABS Components
Cell 44: Stoplamp/BTSI Switch, Inlet/Outlet Solenoid Valves, and Wheel Speed Sensors
Cell 10: TURN LPS, FLAT PACK MTR, PERIM LP, and ABS Fuses
Cell 10: ABS PUMP MOTOR, ABS MAIN, and COOLING FAN Fuses
Cell 14: G102, G104, G106, G110 and G301
Cell 14: G202 (1 of 3) (Buick)
Cell 14: G202 (1 of 3) (Oldsmobile)
Handling ESD Sensitive Parts Notice

### Circuit Description

The normally closed outlet valves operate similarly to the inlet valves. When the EBCM/EBTCM grounds an outlet valve, however, the valve opens instead of closes.

The EBCM/EBTCM opens an outlet valve for short periods in order to reduce pressure at the left front wheel.

### Conditions for Setting the DTC

The DTC C1246 sets when the EBCM/EBTCM detects an open or short to ground in the left front outlet valve circuit.

### Action Taken When the DTC Sets

The following actions are taken when the DTC sets:

• | A malfunction DTC is stored.

• | The ABS is disabled.

• | The ANTILOCK indicator lamp is turned ON.

### Conditions for Clearing the DTC

The DTC will clear under following conditions:

• | Conditions for the malfunction are no longer present. Use the scan tool Clear DTCs function.

• | 100 ignition switch key cycles have passed without detecting any malfunctions.

### Diagnostic Aids

Perform a thorough inspection of the wiring and the connectors.

Failure to inspect wiring carefully may result in a misdiagnosis. A misdiagnosis may result in replacing parts without repairing the malfunction.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check
2 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the BPMV connector C1.
3. Measure the resistance between the BPMV connector C1 terminal 13 and terminal 14.

Is the resistance less than the specified value?

2 ohms

Go to Step 3

Go to Step 13

3 | Measure the resistance between the BPMV connector C1 terminal 14 and the BPMV assembly block. Is the resistance equal to the specified value? | OL (Infinite) | Go to Step 4 | Go to Step 13
4 | Measure the resistance between the BPMV connector C1 terminal 14 and terminal 4. Is the resistance within the specified range? | 3-6 ohms | Go to Step 5 | Go to Step 13
5 |

1. Disconnect the EBCM/EBTCM connector.
2. Install the J 38716 pinout box.
3. Measure the resistance between the J 38716 pinout box terminal 2 and the BPMV harness connector terminal 4.

Is the resistance less than the specified value?

2 ohms

Go to Step 6

Go to Step 9

6 |

1. Reconnect the BPMV harness connector C1.
2. Measure the resistance between the J 38716 pinout box terminal 1 and the ground.

Is the resistance less than the specified value?

2 ohms

Go to Step 7

Go to Step 10

7 |

1. Disconnect the ABS main relay.
2. Measure the resistance between the J 38716 pinout box terminal 1 and the EBCM/EBTCM harness connector terminal 2.

Is the resistance equal to the specified value?

OL (Infinite)

Go to Step 8

Go to Step 11

8 |

1. Reinstall the ABS main relay.
2. Turn the ignition switch to the RUN position.
3. Measure the voltage between the J 38716 pinout box terminal 1 and the EBCM/EBTCM harness connector terminal 2.

Is the voltage greater than the specified value?

1 V

Go to Step 12

Go to Step 14

9 | Repair the open or high resistance in CKT 862. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | --
10 | Repair the open or high resistance in CKT 1451. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | --
11 | Repair the short to ground in CKT 862. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | --
12 | Repair the short to voltage in CKT 862. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Diagnostic System Check | --
13 | Replace the BPMV. Refer to Brake Pressure Modulator Valve Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | --
14 | Replace the EBCM/EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | --