TM 5-2420-231-23-1
0059
Table 1. Transmission Does Not Downshift When Transmission
Kickdown Switch Is Activated - Continued.
059
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Transmission Does Not
2. Remove front instrument panel
Downshift When
right-side cover (WP 0176).
Transmission Kickdown
3. Disconnect powershift wiring har-
Switch Is Activated -
ness connector (WP 0007, Figure
Continued
115) from manual control handle
(WP 0007, Figure 116).
4. Using a digital multimeter, test for
Continuity - Replace manual control
continuity between manual control
handle (WP 0277).
handle wiring harness connector
Proceed to Test Step 5.
(WP 0007, Figure 116) terminals B
No Continuity - Proceed to step 5.
and D. There should be no conti-
nuity.
5. Have an assistant press and hold
the transmission kickdown switch
(TM 5-2420-231-10).
6. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between manual
Proceed to Test Step 3.
control handle wiring harness con-
Resistance Greater Than 5.0 Ohms -
nector (WP 0007, Figure 116) ter-
Replace manual control handle (WP
minals B and D. Resistance should
0277).
be 5.0 ohms or less.
Proceed to Test Step 5.
Test Step 3. Test Transmission
Kickdown Switch Signal Circuit.
1. Remove instrument panel front
cover (WP 0174).
2. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 3.
shift wiring harness connector (WP
Resistance Greater Than 5.0 Ohms -
0007, Figure 115) terminal B and
Replace powershift wiring harness
powershift connector wiring har-
(WP 0167).
ness connector (WP 0007, Figure
Proceed to Test Step 5.
20) terminal J2. Resistance should
be 5.0 ohms or less.
3. Using a digital multimeter, test for
Continuity - Replace powershift wiring
continuity between powershift con-
harness (WP 0167).
nector wiring harness connector
Proceed to Test Step 5.
(WP 0007, Figure 20) terminal K2
No Continuity - Proceed to Test Step 4.
and all other terminals on harness
connector. There should be no
continuity.
Test Step 4. Test Transmission
Kickdown Switch Voltage Supply
Circuit.
1. Connect batteries (WP 0157) and
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
0059-4