P1602

DIAGNOSTIC TROUBLE CODES P1500/P1602
Battery voltage too high or too low,
Battery voltage +30 input to control module incorrect.

Fault Symptom.
Since incorrect battery voltage usually causes trouble in other system functions, the diagnostic trouble codes are for the most part generated together with other diagnostic trouble codes.

Condition
Voltage higher than 16 V (independent of time) or lower than 10 V for at least three seconds after starting.

Diagnostic Procedure.
1. Check the battery and charging system and rectify any faults.
2. Check that the MOTRONIC control module supply voltage is correct on pins 18, 27 and 37, and that pins 2, 14, 19 and 24 are properly connected to a good ground.