DTC P1825 And P1915 Set Defaults To 3rd Gear Start - keywords asembly DTC gear high IMS internal low MIL MH2 MH4 MH6 MY9 mode SES solenoid start switch TCM valve l1 l2 l6 l7 r1 r2 r3 v1 v2 v3 zb

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

Diagnostic codes P1825 and P1915 set, defaults to 3rd gear start.

Poor wire welds on the Internal Mode Switch or internal short to voltage in the Solenoid Valve Asm.(w/Body & TCM).

View the Internal Mode Switch signal readings on the Tech II. Compare with the normal readings (example below).

1. If switch readings are Low when they should be high, replace the Internal Mode Switch and the Solenoid Valve
2. If switch readings are High when they should be Low, replace the Internal Mode Switch.

Example: Normal switch Readings

Example: Switch signal readings Low when they should be High. Replace Internal Mode Switch and the Solenoid Valve Asm.(w/Body & TCM).

Example: Switch signal readings High when they should be Low. Replace Internal Mode Switch

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.