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 B1385 01: Device Ignition START Circuit Short To BatteryDTC B1385 59: Device Ignition START Circuit Protection Time-out
Circuit/System Description
The instrument panel module (IPM) is the power mode master and the remote control door lock receiver (RCDLR) is the backup power mode master. Both modules receive information regarding ignition mode switch position from the ignition mode switch. IPM receives ignition mode switch position data through the IPM ignition mode data signal circuit.
Conditions for Running the DTC
Voltage supplied to the module is in the normal operating voltage range of 9-16 V.
Conditions for Setting the DTC
B1385 01
The IPM sets the code if it detects a short to battery on ignition mode switch signal circuit.
B1385 59
The IPM sets the code if it detects that the START contact of the ignition mode switch is closed for more than 30 seconds.
Action Taken When the DTC Sets
B1385 01
The IPM does not react to switch inputs until condition is cleared.
B1385 59
The IPM does not react to switch inputs of equal or lower priority until condition is cleared.
Conditions for Clearing the DTC
| • | A current DTC clears when the malfunction is no longer present. |
| • | A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Power Mode Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition OFF, disconnect the harness connector at the ignition mode switch.
- Ignition OFF, test for less than 5 Ω of resistance between the ignition mode switch pin E and F.
- Ignition OFF, test for 450 Ω of resistance between the ignition mode switch pin E and F with the START button pressed.
- Ignition OFF, disconnect the X3 harness connector at the IPM.
- Ignition ON, test for less then 1 V between the IPM Ignition Mode Data Signal circuit terminal 29 and ground.
- If all circuits test normal, replace the IPM.
| ⇒ | If not the specified range, replace the ignition mode switch. |
| ⇒ | If not the specified value, replace the ignition mode switch. |
| ⇒ | If greater then the specified value, test the circuit for a short to voltage. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for IPM replacement, programming, and setup.
