Mirror System: Diagnosis Chevrolet Silverado 2500 HD

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Mirrors

Begin the system diagnosis with the Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system.
2. The ability of the control modules to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Diagnostic Fault Information

DTC B1544, B1600, or B1605

Conditions for Running the DTC

The power mirror is being commanded left, right, up, or down.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If the test lamp illuminates, test the appropriate control circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following control circuits and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If less the specified value, test the appropriate control circuit for a short to ground.
4. Test for 40-100 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 6. If not within the specified range, test both control circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. Test for 40-100 ohms of resistance between the control circuit terminal 2 and the control circuit terminal 6. If not within the specified range, test both control circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
6. If all circuits test normal, replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

DTC B1580 or B1590

The ignition is ON.

1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If less than the specified value, test the appropriate circuit for a short to ground.
4. Test for 4K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the low reference circuit terminal 10. If not within the specified range, test the 5-volt reference circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 4. If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
6. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 5. If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
7. If all circuits test normal, replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

DTC B1640

The heated mirrors or commanded ON.

1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the supply voltage circuit terminal 7 and ground. If the test lamp illuminates, test the supply voltage circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the supply voltage circuit terminal 7 and ground. If less than the specified value, test the supply voltage circuit for a short to ground. If the circuit tests normal, test or replace the applicable rearview mirror face.
4. Test for 5-10 ohms of resistance between the supply voltage circuit terminal 7 and the low reference circuit terminal 3. If not within the specified range, test the supply voltage circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the appropriate rearview mirror face.
5. If all circuits test normal, test or replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

DTC B1722

Mirror folding is requested.

Conditions for Setting the DTC

An improper voltage level is seen on either the folding mirror motor retract control circuit or the folding mirror motor extend control circuit.

Action Taken When the DTC Sets

Power folding mirror operations are suspended so long as the fault is present.

Conditions for Clearing the DTC

1. A current DTC will clear when the fault is no longer present.
2. A history DTC will clear after 40 malfunction-free ignition cycles.

1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground: Control circuit terminal 1 Control circuit terminal 2 If the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground: Control circuit terminal 1 Control circuit terminal 2 If less than the specified value, test the appropriate circuit for a short to ground. If the circuits test normal, test or replace the rearview mirror motor.
4. Test for 5-15 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 2. If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. If all circuits test normal, replace the appropriate door switch.

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(ref-278019-S10639375482008012100000) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Heated Mirrors Inoperative (with RPO AN3)»(ref-278022-S34561327472008012100000) or «Heated Mirrors Inoperative (without RPO AN3)»(ref-278022-S26752274662008012100000)
2. «Automatic Day-Night Mirrors Inoperative (with RPO DL3/DR4)»(ref-278022-S33058100882008012100000) or «Automatic Day-Night Mirrors Inoperative (without RPO DL3/DR4)»(ref-278022-S03167859292008012100000)
3. «Power Mirror Folding Inoperative»(ref-278022-S39422365702008012100000)
4. «Power Mirrors Inoperative (with RPO AN3)»(ref-278022-S38674963462008012100000) or «Power Mirrors Inoperative (without RPO AN3)»(ref-278022-S16225740332008012100000)

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Heated Mirrors Inoperative (with RPO AN3)

1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the supply voltage circuit terminal 7 and ground. If the test lamp illuminates, test the supply voltage circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the supply voltage circuit terminal 7 and ground. If less than the specified value, test the supply voltage circuit for a short to ground. If the circuit tests normal, test or replace the applicable rearview mirror face.
4. Test for 5-10 ohms of resistance between the supply voltage circuit terminal 7 and the low reference circuit terminal 3. If not within the specified range, test the supply voltage circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the appropriate rearview mirror face.
5. If all circuits test normal, test or replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror.
2. Ignition OFF, test for less than 5 ohms of resistance between the ground circuit terminal 3 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the B+ circuit terminal 7 and ground.
4. Ignition ON, command the rear window defogger ON and OFF with the rear defogger switch. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the B+ circuit for a short to voltage. If the test lamp is always OFF, test the B+ circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, test or replace the outside rearview mirror face.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Automatic Day-Night Mirrors Inoperative (with RPO DL3/DR4)

Reverse Input Malfunction

1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
2. Ignition ON, park brake applied, vehicle in REVERSE, test for B+ between the supply voltage circuit terminal 9 and ground. If less than the specified value, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to «Backup Lamps Inoperative»(ref-277990-S26636462752008012100000) .
3. If all circuits test normal, test or replace the inside rearview mirror.

Outside Rearview Mirror Dimming Malfunction

1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
2. Ignition ON, verify a test lamp does not illuminate between the following circuits and ground: Signal circuit terminal 5 Low reference circuit terminal 16 If the test lamp illuminates, test the applicable circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground: Signal circuit terminal 5 Low reference circuit terminal 16 If less than the specified range, test the applicable circuit for a short to ground.
4. Test for less than 100 ohms of resistance between the signal circuit terminal 5 and the low reference circuit terminal 16. If greater than the specified range, test both circuits for an open/high resistance. If the circuit tests normal, test or replace the driver outside rearview mirror face.
5. If all circuits test normal, replace the inside rearview mirror.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Automatic Day-Night Mirrors Inoperative (without RPO DL3/DR4)

Reverse Input Malfunction

1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
2. Ignition ON, park brake applied, vehicle in REVERSE, test for B+ between the supply voltage circuit terminal 9 and ground. If less than the specified value, test the supply voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, refer to «Backup Lamps Inoperative»(ref-277990-S26636462752008012100000) .
3. If all circuits test normal, test or replace the inside rearview mirror.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Power Mirror Folding Inoperative

1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground: Control circuit terminal 1 Control circuit terminal 2 If the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground: Control circuit terminal 1 Control circuit terminal 2 If less than the specified value, test the appropriate circuit for a short to ground. If the circuits test normal, test or replace the rearview mirror motor.
4. Test for 5-15 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 2. If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. If all circuits test normal, replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

Power Mirrors Inoperative (with RPO AN3)

Mirror Motor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector X3 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following control circuit terminals and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If the test lamp illuminates, test the appropriate control circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following control circuits and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 6 If less the specified value, test the appropriate control circuit for a short to ground.
4. Test for 40-100 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 6. If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. Test for 40-100 ohms of resistance between the control circuit terminal 2 and the control circuit terminal 6. If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
6. If all circuits test normal, replace the appropriate door switch.

Mirror Position Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If the test lamp illuminates, test the appropriate circuit for a short to voltage.
3. Ignition OFF, test for infinite resistance between the following circuits and ground: 5-volt reference circuit terminal 7 Signal circuit terminal 4 Signal circuit terminal 5 Low reference circuit terminal 10 If less than the specified value, test the appropriate circuit for a short to ground.
4. Test for 4K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the low reference circuit terminal 10. If not within the specified range, test the 5-volt reference circuit and the low reference circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
5. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 4. If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
6. Test for 1K-7K ohms of resistance between the 5-volt reference circuit terminal 7 and the signal circuit terminal 5. If not within the specified range, test the signal circuit for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.
7. If all circuits test normal, replace the appropriate door switch.

1. Perform the «Diagnostic System Check - Vehicle»(ref-278018-S19353494792008012100000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-278018-S03493196652008012100000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-278018-S38264170562008012100000) provides an overview of each diagnostic category.

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
2. Ignition OFF, test for less than 2 ohms of resistance between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal G and ground. If the test lamp does not illuminate, test the B+ circuit for an open/high resistance. If the B+ circuit fuse is open, test the B+ circuit and each of the mirror position control circuits for a short to ground.
4. Ignition OFF, reconnect the harness connector at the outside rearview mirror switch. Disconnect the harness connector at the inoperative mirror.
5. Ignition OFF, with the outside rearview mirror switch in the UP position, test for 5 ohms of resistance between the control circuit terminal 6 and ground. If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
6. With the outside rearview mirror switch in the DOWN position, test for 5 ohms of resistance between the control circuit terminal 1 and ground. If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
7. With the outside rearview mirror switch in the LEFT position, test for 5 ohms of resistance between the control circuit terminal 6 and ground. If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
8. With the outside rearview mirror switch in the RIGHT position, test for 5 ohms of resistance between the control circuit terminal 2 and ground. If greater than the specified range, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
9. Ignition ON, with the outside rearview mirror switch in the UP position, verify a test lamp illuminates between the control circuit terminal 1 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
10. Ignition ON, with the outside rearview mirror switch in the DOWN position, verify a test lamp illuminates between the control circuit terminal 6 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
11. Ignition ON, with the outside rearview mirror switch in the LEFT position, verify a test lamp illuminates between the control circuit terminal 2 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
12. Ignition ON, with the outside rearview mirror switch in the RIGHT position, verify a test lamp illuminates between the control circuit terminal 6 and ground. If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the outside rearview mirror switch.
13. If all circuits test normal, test or replace the applicable outside rearview mirror motor.