DIWA.3 terminal connection diagram

DIWA.3 test steps

1. Open plug connection S1.
   Measure resistance between socket contacts 3 and 52 or 53 of cable 1.
   R_Target = 11-20 Ω.
   If R = R_Target, continue with 4.
2. Open S3.
   Measure resistance between contacts N and A or B (cable harness or WB and -UB (measuring cable).
   R_Target = 11-20 Ω.
3. Remove control cover.
   Open S4.
   Measure resistance between pin contacts 4 and 2 of tab plug of WP solenoid.
   R_Target = 11 ± 0.7 Ω.
4. Check resistance between contact 2 and vehicle ground at open plug connection S4.
   R_Target = ∞ Ω.

DIWA.3E terminal connection diagram

DIWA.3E test steps

1. Open plug connection S1.
   Measure resistance between socket contacts 1 and 52 or 53 of cable 1.
   R_Target = 11-20 Ω.
   If R = R_Target, continue with 4.
2. Open S3.
   Measure resistance between contacts T and A or B (cable harness) or WB and -UB (measuring cable).
   R_Target = 11-20 Ω.
3. Remove control cover.
   Open S4.
   Measure resistance between pin contacts 4 and 2 of tab plug of WP solenoid.
   R_Target = 11 ± 0.7 Ω.
4. Check resistance between contact 2 and vehicle ground at open plug connection S4.
   R_Target = ∞ Ω.

Resistance characteristic

When measuring the coil resistance, please observe the dependence on the temperature.
Simultaneously to the resistance measurement, the temperature of the solenoid enclosure has to measured, too, or estimated with utmost accuracy. Read the target resistance from the temperature resistance curve below, assuming the measured or estimated temperature, and compare it to the measured value.

Operating coil

Measure the resistance between pin 4 and pin 2.
The operating coil is intact when the measured resistance deviates from the target resistance by no more than ± 1 Ω approximately.