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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (ENGINE CONTROL SYSTEM - 8.1L - DTC P0506 TO DTC U0107)DTC P2135TEST DESCRIPTION
2006 Chevrolet Suburban C1500, 5.3 Z
Test Description
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Test Description
WARNING: This page is about a different variant/trim than selected.
The number below refers to the step number on the diagnostic table.
- 21: When the TAC module detects a condition within the TAC System, more than 1 TAC System related DTC may set. This is due to the many redundant tests run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Disconnecting components during testing may set additional DTCs. Remember this if you review the stored information in Capture Info.
DTC P2135
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 | Is DTC U0107 set? | Go to Diagnostic Trouble Code (DTC) List - Vehicle | Go to Step 3 |
| 3 |
|
Go to Step 5 | Go to Step 4 |
| 4 |
|
Go to Step 18 | Go to Step 20 |
| 5 |
|
Go to Step 20 | Go to Step 6 |
| 6 | Test for a short between the TP sensor 1, 5-volt reference circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 7 |
| 7 | Test the TP sensor 1 signal circuit for resistance with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 8 |
| 8 | Test for a short between the TP sensor 1 signal circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 9 |
| 9 | Test the TP sensor 1 low-reference circuit for resistance with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 10 |
| 10 | Test for a short between the TP sensor 1 low-reference circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 11 |
| 11 | Test the TP sensor 2, 5-volt reference circuit for resistance with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 12 |
| 12 | Test for a short between the TP sensor 2, 5-volt reference circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 13 |
| 13 | Test the TP sensor 2 signal circuit for resistance with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 14 |
| 14 | Test for a short between the TP sensor 2 signal circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 15 |
| 15 | Test the TP sensor 2 low-reference circuit for resistance with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 16 |
| 16 | Test for a short between the TP sensor 2 low-reference circuit and all other TAC module circuits with a DMM. Refer to Circuit Testing
and Wiring Repairs
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 17 |
| 17 | Inspect for an intermittent and for a poor connection at the harness connector of the TAC module. Refer to Testing for Intermittent Conditions and Poor Connections
and Repairing Connector Terminals
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 18 |
| 18 | Inspect for an intermittent and for a poor connection at the harness connector of the throttle body. Refer to Testing for Intermittent Conditions and Poor Connections
and Repairing Connector Terminals
. Did you find and correct the condition? |
Go to Step 20 | Go to Step 19 |
| 19 | Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement
. Did you complete the replacement? |
Go to Step 20 | - |
| 20 |
|
Go to Step 2 | Go to Step 21 |
| 21 | 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 |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.