P215C

P215C-OUTPUT SHAFT SPEED - WHEEL SPEED CORRELATION

For a complete wiring diagram Refer to the Wiring Information.

Theory of Operation

The vehicle speed sensor signal is a direct input to the Anti-Lock Brake (ABS) module. The ABS module busses the wheel speed signal over the CAN C BUS. The Transmission Control Module (TCM) receives the message from the CAN BUS. The Output Shaft Speed (OSS) sensor is part of the wiring harness leadframe that is attached to the valve body. The OSS signal is sent directly to the TCM.

- When Monitored:
When the ignition switch is turned to the run position.

The vehicle is in a forward gear.

No ABS or OSS DTCs set.

- Set Condition:
The TCM a corrupt signal over the CAN C circuit from the ABS module. The circuit is continuously monitored.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 8HP45 Pre-Diagnostic Troubleshooting Procedure

1. CHECK DTC IS CURRENT
1. Ignition ON, engine NOT running.
2. With the scan tool, select View TCM DTCs.

Is the DTC Active?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

2. U0121-LOST COMMUNICATION WITH ABS MODULE ALSO SET
1. With the scan tool continue reading DTCs.

Is U0121-LOST COMMUNICATION WITH ABS MODULE set?

Yes

- Follow the diagnostics for U0121-LOST COMMUNICATION WITH ABS MODULE. U0121.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Replace and program the TCM. Valve Body - Removal.
- Perform the TRANSMISSION VERIFICATION TEST. Verification Tests.