SMU - Revised DTC Tables for P0716 and P0717 (Section 7 - Auto Trans)
| Subject: | Revised DTC Tables for P0716 and P0717 (Section 7 Automatic Transmission) |
| Models: | 1998-2000 Chevrolet and GMC C/K Models and G Van |
| with Hydra-Matic 4L80-E Automatic Transmission (RPO MT1) |
This bulletin is being issued to revise the tables for DTC's P0716 and P0717 in the Automatic Transmission 4L80-E Section of the Service Manual. The new tables improve the diagnosis of a short to ground on circuit 1230. Make note of the changes in your Service Manual.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check Section 6E3 | |||||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions in Engine Controls | ||||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||||
12 | Replace the VCM. Refer to VCM Replacement/Programming in Engine Controls. Did you complete the replacement? | -- | -- | |||||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check Section 6E3 | |||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions in Engine Controls | ||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||
12 | Replace the VCM. Refer to VCM Replacement/Programming in Engine Controls. Did you complete the replacement? | -- | -- | |||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (4.3 L) or A Powertrain On Board Diagnostic (OBD) System Check (5.7 L and 7.4 L) Section 6E3 | |||||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (4.3 L) or Intermittent Conditions (5.7 L and 7.4 L) in Engine Controls | ||||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (4.3 L) or VCM Replacement/Programming (5.7 L and 7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (4.3 L) or A Powertrain On Board Diagnostic (OBD) System Check (5.7 L and 7.4 L) Section 6E3 | |||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (4.3 L) or Intermittent Conditions (5.7 L and 7.4 L) in Engine Controls | ||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (4.3 L) or VCM Replacement/Programming (5.7 L and 7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (5.7 L) or A Powertrain On Board Diagnostic (OBD) System Check (7.4 L) Section 6E3 | |||||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (5.7 L) or Intermittent Conditions (7.4 L) in Engine Controls | ||||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (5.7 L) or VCM Replacement/Programming (7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (5.7 L) or A Powertrain On Board Diagnostic (OBD) System Check (7.4 L) Section 6E3 | |||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (5.7 L or Intermittent Conditions (7.4 L) in Engine Controls | ||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (5.7 L) or VCM Replacement/Programming (7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (4.3 L) or A Powertrain On Board Diagnostic (OBD) System Check (5.7 L) or A Powertrain On Board Diagnostic (OBD) System Check (7.4 L) Section 6E3 | |||||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (4.3 L) or Intermittent Conditions (5.7 L) or Intermittent Conditions (7.4 L) in Engine Controls | ||||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (4.3 L) or VCM Replacement/Programming (5.7 L) or VCM Replacement/Programming (7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for proper operation to the A/T ISS Sensor.
-
This step tests for proper A/T ISS circuit operation up to the VCM connections. Remove the fuel pump relay in order to eliminate a flooding condition during this step.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Powertrain Diagnostic System Check? | -- | Go to A Powertrain On Board Diagnostic (OBD) System Check (4.3 L) or A Powertrain On Board Diagnostic (OBD) System Check (5.7 L) or A Powertrain On Board Diagnostic (OBD) System Check (7.4 L) Section 6E3 | |||||
Important: Before clearing the DTC, use the Scan Tool in order to record the Freeze Frame and Failure Records for reference. The Clear Info function will erase the data. With the drive wheels rotating, does the Scan Tool Transmission ISS increase with the drive wheel speed? | -- | Go to Intermittent Conditions (4.3 L) or Intermittent Conditions (5.7 L) or Intermittent Conditions (7.4 L) in Engine Controls | ||||||
3 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
4 | Measure the resistance from terminal C3-7 to ground. Does the resistance measure greater than the specified value? | 50 K ohms | ||||||
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | |||||||
6 |
Does the resistance measure within the specified range? | 1377-3355 ohms | ||||||
7 | Was the resistance measured in Step 3 greater than the specified value? | 3355 ohms | ||||||
8 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
9 |
Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
10 | Test the high circuit (CKT 1230) and the low circuit (CKT 1231) of the ISS assembly for a short together. Refer to General Electrical Diagnosis Procedures in Wiring Systems. Did you find and correct the condition? | -- | -- | |||||
11 | Replace the ISS assembly. Refer to Vehicle Speed Sensor Replacement . Did you complete the replacement? | -- | -- | |||||
12 | Replace the VCM. Refer to VCM Replacement/Programming (4.3 L) or VCM Replacement/Programming (5.7 L) or VCM Replacement/Programming (7.4 L) in Engine Controls. Did you complete the replacement? | -- | -- | |||||
13 | Perform the following procedure in order to verify the repair:
Has the test run and passed? | -- | System OK |
