For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC B0980: Transmission Sport Switch Circuit Short to Ground

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Signal | B0980 | 1 | -- | --
Ground | -- | 1 | -- | --
Transmission Hold Mode Inoperative

### Circuit/System Description

The transmission hold switch is an input to the instrument panel cluster (IPC). The switch signal circuit is supplied a reference voltage from the IPC. When the hold switch is pressed the reference voltage is closed to ground. When the reference voltage is low the switch is determined to be active.

### Conditions for Running the DTC

Ignition voltage is greater than 9.5 V.

### Conditions for Setting the DTC

The hold switch signal circuit is low for greater than 60 seconds.

### Action Taken When the DTC Sets

The transmission hold mode will be disabled.

### Conditions for Clearing the DTC

The current DTC clears when the fault is no longer present.

### Reference Information

#### Schematic Reference

Instrument Cluster Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Instrument Panel Description

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, observe the scan tool Hold Switch parameter while pressing and releasing the hold switch. The reading should change between Active and Inactive.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the hold switch.
2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Hold Switch parameter is Inactive.

⇒ | If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the IPC.

4. Install a 3A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 2. Verify the scan tool Hold Switch parameter is Active.

⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.

5. If all circuits test normal, test or replace the hold switch.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for IPC replacement, programming, and setup.