Refer to Engine Controls Schematics
Starter Enable Control
.
Circuit Description
The PCM has the ability to disable the starter operation if conditions inappropriate for starter operation exist. The PCM disables the starter if the engine is running, if a correct VTD password is not received from the VTD system, or if the vehicle operator attempts to engage the starter for an extended period of time.
The PCM controlled starter system consists of the following components:
| • | The starter enable relay |
| • | The transaxle range or park/neutral position (PNP) switch |
| • | The ignition switch |
| • | The starter solenoid |
| • | The PCM |
Diagnostic Aids
The PCM Controlled Starter Diagnosis table is intended to identify electrical malfunctions that can occur with the system. For additional system diagnosis, refer to Diagnostic System Check - Engine Electrical in Engine Electrical.
Check for the following conditions:
| • | A faulty connection at the PCM , the starter enable relay, the PNP switch, the ignition switch, or the starter solenoid |
| Inspect the harness connectors for the following conditions: |
| - | Backed out terminals |
| - | Improper mating |
| - | Broken locks |
| - | Improperly formed or damaged terminals |
| - | Faulty terminal-to-wire connections |
| • | Inspect the wiring harness for damage. |
| • | VIN 1--Either of the following conditions can cause the PCM to disable the starter operation: |
| - | The engine is running. |
| - | The starter has been continuously engaged for more than 30 seconds. |
| - | A correct password has not been received from the VTD system. |
| • | VIN K--Either of the following conditions can cause the PCM to disable the starter operation: |
| - | The engine is running. |
| - | The starter has been continuously engaged for more than 15 seconds. |
| - | A correct password has not been received from the VTD system. |
Step | Action | Values | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Does the starter run continuously? | -- | ||||||||
2 | Was the Powertrain On-Board Diagnostic (OBD) System Check performed? | -- | ||||||||
3 | Are any other DTCs set? | |||||||||
4 | Remove the starter relay and probe the relay switch feed with a test lamp connected to ground. Does the test lamp illuminate? | -- | ||||||||
5 |
Important: When performing this step, the engine may crank. Ensure that the following
conditions are met:
Does the engine crank? | -- | ||||||||
6 |
Does the test lamp illuminate? | -- | ||||||||
7 | Probe the relay control circuit with a test lamp connected to B+. Does the test lamp illuminate? | -- | ||||||||
8 | Remove the starter relay. Does the starter run continuously? | -- | ||||||||
9 |
Does the test lamp illuminate? | -- | ||||||||
10 | Is the relay switch feed fuse open? | -- | ||||||||
11 | Is the relay coil feed fuse open? | -- | ||||||||
12 | Test the feed circuit of the relay switch for a short to ground. Repair the circuit if necessary. Refer to Wiring Repairs in Wiring Systems. Was a repair necessary? | -- | ||||||||
13 | Test the feed circuit of the relay switch for an open. Repair the circuit if necessary. Refer to Wiring Repairs in Wiring Systems. Was a repair necessary? | -- | -- | |||||||
14 | Test the feed circuit of the relay coil and all shared circuits for a short to voltage. Repair the circuit if necessary. Refer to Wiring Repairs in Wiring Systems. Was a repair necessary? | -- | ||||||||
15 | Test the feed circuit of the relay coil and all shared circuits for a short to ground. Repair the circuit if necessary. Refer to Wiring Repairs in Wiring Systems. Was a repair necessary? | -- | ||||||||
16 |
Is the current reading within the specified range? | 0.5-1.5 A | ||||||||
17 | Test the feed circuit of the relay coil for an open. Repair the circuit if necessary. Refer to Wiring Repairs in Wiring Systems. Was a repair necessary? | -- | ||||||||
18 | Test the feed circuit for the ignition switch for an open. Repair the circuit if necessary. Was a repair necessary? | -- | ||||||||
19 | Test the feed circuit for the starter solenoid for a short to voltage. Repair the circuit if necessary. Was a repair necessary? | -- | ||||||||
20 | Test the feed circuit for the starter solenoid for a short to ground. Repair the circuit if necessary. Was a repair necessary? | -- | ||||||||
21 |
Does the test lamp illuminate for more than 5 seconds? | -- | ||||||||
22 | Test the feed for the starter solenoid for an open. Repair the circuit if necessary. Was a repair necessary? | -- | ||||||||
23 | Test the control circuit for the starter relay for an open or a short to voltage. Repair the circuit if necessary. Was a repair necessary? | -- | ||||||||
24 | Inspect for a faulty connection at the relay, and repair if necessary. Was a repair necessary? | -- | ||||||||
25 | Inspect for a faulty connection in the feed circuit for the starter solenoid at the starter solenoid, and repair if necessary. Was a repair necessary? | -- | ||||||||
26 | Inspect for a faulty connection in the control circuit for the relay at the PCM, and repair if necessary. Was a repair necessary? | -- | ||||||||
27 | Inspect for a faulty connection in the feed circuits for the relay and the ignition switch at the ignition switch, and repair if necessary. Was a repair necessary? | -- | ||||||||
28 | Replace the ignition switch. Refer to Ignition and Start Switch Replacement in Instrument Panel, Gauges, and Console. Did you complete the repair? | -- | -- | |||||||
29 | Replace the starter solenoid. Refer to Starter Motor Replacement in Engine Electrical. Did you complete the repair? | -- | -- | |||||||
30 | Replace the starter relay. Did you complete the repair? | -- | -- | |||||||
31 |
Important: The replacement PCM must be programmed. Refer to Powertrain Control Module Replacement/Programming . Replace the PCM. Did you complete the repair? | -- | -- | |||||||
32 |
Does the engine crank normally? | -- | System OK |
