For 1990-2009 cars

### Diagnostic Instructions

• | Preform 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 P1336 00: Crankshaft Position System Variation Not Learned

### Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

The ECM monitors its ability to read and write to the memory. It also monitors a timing function.

### Conditions for Running the DTC

• | The ignition switch is in Run or Crank.

• | DTC P1336 00 runs once per ignition cycle when the above condition is met.

### Conditions for Setting the DTC

The ECM detects an internal failure or incomplete programming for more than 10 s.

### Action Taken When the DTC Sets

DTCs P1336 00 is a Type A DTC.

### Conditions for Clearing the DTC

DTCs P1336 00 is a Type A DTC.

### Reference Information

#### Schematic Reference

Engine Controls Schematics

#### Connector End View Reference

Component Connector End Views

#### Electrical Information Reference

• | Circuit Testing

• | Testing for Intermittent Conditions and Poor Connections

• | Connector Repairs

• | Wiring Repairs

#### DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Testing

1. Observe the DTCs with the scan tool.

⇒ | If DTC P1336 00 is set, attempt to program the K20 Engine Control Module (ECM) before replacing the K20 Engine Control Module (ECM). Refer to Engine Control Module Programming and Setup.

2. Test the K20 Engine Control Module (ECM) voltage circuits at ECM terminal 21, 50 (X1) and terminal 2, 4, 6 (X2) and test the ground circuits at ECM terminal 20, 35 (X1) and terminal 1, 3, 5 (X2) for the following:

• | A short

• | An open

• | High resistance

⇒ | If all circuits test normal, replace the K20 Engine Control Module (ECM). Refer to Engine Control Module Replacement.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Engine Control Module Programming and Setup for engine control module replacement, programming and setup