Current Or Intermittent DTC P2534 - keywords calibrate MIL SES

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment on an illuminated MIL where a DTC P2534 is found in the TCM as a history or active DTC.

This DTC is caused by low Ignition 1 voltage at the TCM. When diagnosing this DTC be sure to inspect the wire harness from the underhood fuse block to the TCM, especially in the right rear area of engine. The harness may have chaffed on the engine causing damage to the Ignition 1 circuit, wire 339, Pink. If wire damage is found refer to Wiring Repairs in SI for further directions on repairing the wire

If no wiring concerns are found a revised calibration which will address this concern is being developed and will be available on TIS2WEB in the near future. Updated information will be provided when this calibration becomes available.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.