Test Description

The number below refers to the step number on the diagnostic table.

3: When the test lamp is tapped on the low resolution engine speed signal circuit, the PCM detects engine speed and applies 5 volts to the IC timing signal circuit.

DTC P1350

Step	Action	Values	Yes	No
Schematic Reference: Engine Controls Schematics Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections
3	Turn OFF the ignition. Disconnect the ignition control module (ICM) connector. Turn ON the ignition, with the engine OFF. Measure the voltage from the ignition control (IC) timing signal circuit to a good ground with a DMM. Tap on the low resolution engine speed signal circuit repeatedly with a test lamp that is connected to battery voltage while monitoring the DMM. Refer to Probing Electrical Connectors . Is the voltage more than the specified value?	4.9 V	Go to Step 4	Go to Step 6
4	Is the voltage more than the specified value?	6 V	Go to Step 7	Go to Step 5
5	Observe the DTC information with a scan tool. Is DTC P0350 also set?	-	Go to Step 10	Go to Step 11
6	Connect a test lamp to battery voltage. Probe the ignition control (IC) timing signal circuit at the ICM connector with the test lamp. Refer to Probing Electrical Connectors . Does the test lamp illuminate?	-	Go to Step 8	Go to Step 9
7	Test the ignition control (IC) timing signal circuit between the ICM and the powertrain control module (PCM) for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
8	Test the IC timing signal circuit between the ICM and the PCM for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
9	Test the IC timing signal circuit between the ICM and the PCM for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 12
10	Test the IC timing control circuit between the ICM and the PCM for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
11	Test for an intermittent and poor connections at the ICM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 13
12	Test for an intermittent and poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
13	Replace the ICM. Refer to Ignition Control Module Replacement . Did you complete the replacement?	-	Go to Step 15	-
14	Replace the PCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	-	Go to Step 15	-
15	Clear the DTCs with a scan tool. Turn OFF ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition?	-	Go to Step 2	Go to Step 16
16	Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle	System OK