Pinpoint Test X: DTC B11E0:12, 14; B11E1:12, 14 or B11E2:12, 14
Climate Control System
Pinpoint Tests
Pinpoint Test X: DTC B11E0:12, 14; B11E1:12, 14 or B11E2:12, 14
Refer to Wiring Diagram Set 52, Auxiliary Climate Control for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 54, Manual Climate Control System for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 55, Automatic Climate Control System for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, when each mode is selected on the auxiliary climate control assembly, the HVAC module will illuminate the appropriate auxiliary mode indicators on the auxiliary climate control assembly. The mode indicators are illuminated from the HVAC module.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Auxiliary climate control assembly
- HVAC module
PINPOINT TEST X: DTC B11E0:12, 14; B11E1:12, 14 OR B11E2:12, 14
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X1 CHECK THE HVAC MODULE FOR DTCs
- Ignition ON.
- Check the HVAC module for DTCs.
- Is DTC B11E0:12, B11E1:12 or B11E2:12 present?
Yes
GO to X2.
No
GO to X3.
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X2 CHECK INDICATOR CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: Auxiliary Climate Control Assembly C3198.
- Disconnect: HVAC Module C228B.
- Ignition ON.
- Measure the voltage between ground and:
- For DTC B11E0:12, HVAC module C228B-18, circuit CHA35 (BU/BN), harness side.
- For DTC B11E1:12, HVAC module C228B-17, circuit CHA36 (GY/BN), harness side.
- For DTC B11E2:12, HVAC module C228B-16, circuit CHA37 (WH), harness side.
- Is any voltage present?
Yes
REPAIR circuit(s) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
No
INSTALL a new auxiliary climate control assembly. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. If the condition returns, GO to X5.
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X3 CHECK INDICATOR CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: Auxiliary Climate Control Assembly C3198.
- Disconnect: HVAC Module C228B.
- Measure the resistance between ground and:
- For DTC B11E0:14, HVAC module C228B-18, circuit CHA35 (BU/BN), harness side.
- For DTC B11E1:14, HVAC module C228B-17, circuit CHA36 (GY/BN), harness side.
- For DTC B11E2:14, HVAC module C228B-16, circuit CHA37 (WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to X4.
No
REPAIR circuit(s) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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X4 CHECK INDICATOR CIRCUITS FOR AN OPEN
- Ignition OFF.
DTC B11E0:14
- For DTC B11E0:14, measure the resistance between HVAC module C228B-18, circuit CHA35 (BU/BN), harness side and auxiliary climate control assembly C3198-8, circuit CHA34 (YE/BU), harness side.
DTC B11E1:14
- For DTC B11E1:14, measure the resistance between HVAC module C228B-17, circuit CHA36 (GY/BN), harness side and auxiliary climate control assembly C3198-7, circuit CHA34 (YE/BU), harness side.
DTC B11E2:14
- For DTC B11E2:14, measure the resistance between HVAC module C228B-16, circuit CHA37 (WH), harness side and auxiliary climate control assembly C3198-6, circuit CHA34 (YE/BU), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new auxiliary climate control assembly. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. If the condition returns, GO to X5.
No
REPAIR circuit(s) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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X5 CHECK THE HVAC MODULE CONNECTION
- Inspect the module connectors for:
- corrosion.
- pushed-out terminals.
- damaged terminals.
- Connect and correctly seat all the HVAC module connectors.
- Clear the DTCs.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new HVAC module. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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