U1107
U1107-ECU IN SINGLE-WIRE MODE
For a complete wiring diagram consult Diagrams/Electrical.
- When Monitored:
With the ignition on.
- Set Condition:
The TIPM detects an open, a short high, a short low or a short together in either of the CAN B Bus circuits.
Diagnostic Test
1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase TIPM DTC's.
Cycle the ignition from on to off 3 times.
Turn the ignition on.
With the scan tool, read active TIPM DTC's.
Does the scan tool display this DTC as active?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
2. ANY CAN B BUS MODULE- INTERNAL FAULT
Turn the ignition off.
With the scan tool, monitor the active TIPM DTCs.
While monitoring the scan tool, disconnect each CAN B Bus module one at a time.
NOTE: When performing the above step, turn the ignition off (wait one minute) before disconnecting any module. When the module is disconnected turn the ignition on.
NOTE: This is to determine if the fault is internal within a module.
Check for this DTC to become active after disconnecting each CAN B Bus module the vehicle is equipped with.
NOTE: If the DTC becomes stored when a particular CAN B Bus module is disconnected, that module is causing the DTC to set.
With all the CAN B Bus modules disconnected did the TIPM still set this DTC as active?
Yes
- Go To 3
No
- Replace the module that when disconnected caused the DTC to become stored.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
3. (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Totally Integrated Power Module C1 harness connector.
NOTE: Ensure each CAN B Bus module is disconnected at this time.
Turn the ignition on.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
Is the voltage above 10.0 volts?
Yes
- Repair the (D55) CAN B Bus (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
No
- Go To 4
4. (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE
NOTE: Ensure each CAN B Bus module is disconnected at this time.
Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
Is the voltage above 10.0 volts?
Yes
- Repair the (D54) CAN B Bus (-) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
No
- Go To 5
5. (D55) CAN B BUS (+) CIRCUIT FOR A SHORT TO GROUND
Turn the ignition off.
NOTE: Ensure each CAN B Bus module is disconnected at this time.
Measure the resistance between ground and the (D55) CAN B Bus (+) circuit.
Is the resistance above 1000.0 ohms?
Yes
- Go To 6
No
- Repair the (D55) CAN B Bus (+) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
6. (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO GROUND
NOTE: Ensure each CAN B Bus module is disconnected at this time.
Measure the resistance between ground and the (D54) CAN B Bus (-) circuit.
Is the resistance above 1000.0 ohms?
Yes
- Go To 7
No
- Repair the (D54) CAN B Bus (-) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
7. (D55) CAN B BUS (+) CIRCUIT SHORTED TO THE (D54) CAN B BUS (-) CIRCUIT
Measure the resistance between the (D55) CAN B Bus (+) circuit and (D54) CAN B Bus (-) circuit.
NOTE: Ensure each CAN B Bus module is disconnected at this time.
Is any resistance present?
Yes
- Repair the (D55) CAN B Bus (+) circuit for a short to the (D54) CAN B Bus (-) circuit.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
No
- Go To 8
8. (D55) CAN B BUS (+) CIRCUIT OPEN
Measure the resistance of the (D55) CAN B Bus (+) circuit between the TIPM connector and the Cluster connector.
Is the resistance above 10.0 ohms?
Yes
- Repair the (D55) CAN B Bus (+) circuit for an open or high resistance.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
No
- Go To 9
9. (D54) CAN B BUS (-) CIRCUIT OPEN
Measure the resistance of the (D54) CAN B Bus (-) circuit between the TIPM connector and the Cluster connector.
Is the resistance above 10.0 ohms?
Yes
- Repair the (D54) CAN B Bus (-) circuit for an open or high resistance.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.
No
- Replace and program the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.