Engine Controls - Pin Voltage Charts - 6.5l Diesel GMC Suburban I

INTRODUCTION

Pin voltage charts are supplied (when available) to reduce diagnostic time. Checking pin voltages at the electronic control unit determines whether it is receiving and transmitting proper signals. Charts may also help determine if control unit harness is shorted or open.

Note. Unless stated otherwise in testing procedures, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.

6.5L DIESEL - "C" & "K" SERIES WITH A/T & M/T

Note. This PCM voltage chart, along with digital voltmeter, can help save diagnosis time. Voltage readings may vary slightly depending on battery voltage and alternator output.

The following conditions must be met before testing

1. Engine at operating temperature.
2. Engine in closed loop operation.
3. Engine idling (Engine Operating column).
4. DLC test terminal NOT grounded.
5. Scan tester NOT installed.

PCM Pin Voltage Chart (1 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 1

PCM Pin Voltage Chart (2 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 2

PCM Pin Voltage Chart (3 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 3

PCM Pin Voltage Chart (4 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 4

PCM Pin Voltage Chart (5 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 5

PCM Pin Voltage Chart (6 Of 6) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 6

PCM Terminal A-B Connector ID - Pink (1 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 7

PCM Terminal A-B Connector ID - Pink (2 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 8

PCM Terminal C-D Connector ID - Pink (1 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 9

PCM Terminal C-D Connector ID - Pink (2 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 10

PCM Terminal E-F Connector - Blue (1 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 11

PCM Terminal E-F Connector - Blue (2 Of 2) (6.5L Diesel - "C" & "K" Series With A/T & M/T). Scheme 12

6.5L DIESEL - "P" SERIES WITH 4L80-E A/T

Note. This PCM voltage chart, along with digital voltmeter, can help save diagnosis time. Voltage readings may vary slightly depending on battery voltage and alternator output.

The following conditions must be met before testing

1. Engine at operating temperature.
2. Engine in closed loop operation.
3. Engine idling (Engine Operating column).
4. DLC test terminal NOT grounded.
5. Scan tester NOT installed.

PCM Pin Voltage Chart (1 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 13

PCM Pin Voltage Chart (2 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 14

PCM Pin Voltage Chart (3 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 15

PCM Pin Voltage Chart (4 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 16

PCM Pin Voltage Chart (5 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 17

PCM Pin Voltage Chart (6 Of 6) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 18

PCM Terminal A-B Connector ID - Pink (1 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 19

PCM Terminal A-B Connector ID - Pink (2 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 20

PCM Terminal C-D Connector ID - Pink (1 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 21

PCM Terminal C-D Connector ID - Pink (2 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 22

PCM Terminal E-F Connector ID - Blue (1 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 23

PCM Terminal E-F Connector ID - Blue (2 Of 2) (6.5L Diesel - "P" Series With 4L80-E A/T). Scheme 24